Quality center Interview Questions and Answers

Quality center Interview Questions and Answers
1.What is Quality Center?
QC is mercury interactive process based test management system.
2.Why use Quality Center?
QC is a part of the Test Suite set of tools that allows u to organize and manage your testing effort.
-create a repository to store all the test results, metrics and collateral.
-maintain security for the testing project.
-Writing manual test cases and automated test scripts
-Scheduling and executing the tests
-Integrating with the feature testing tool (Win Runner & QTP)
-Analyze the entire testing process with graphs and reports
-generate custom project documents (MS Word, MS Project)
-Provides a means for defect tracking and reporting
-Is accessible world-wide
3.What are the phases of Quality Center process?
-Setting up the QC project
-Requirements Management
-Create Test Cases
-Run Tests and Analyze Results
-Report and Track Defects
4.What are the features of Quality Center?
-Entirely browser based
-Project customization now a separate module
-Test requirements management
-Execution Flow tab
-"Drill Down" in graphs
-save graph, report and grid settings for reuse
-Attach screen snapshots to any object that accepts attachments
-Web Defect Manager functionality built into Defects tab
5.What is a Quality Center Project?
A QC project is a customizable repository for the testing effort. It contains tests, test sets, execution records, defect reports and other test documentation.
6.What data sources (databases) does QC use to store and manage data?
A QC project can be stored and managed using the following data sources.
-Microsoft Access
-Sybase
-Microsoft Sql
-Oracle
7.How does u create a project in QC?
Use the Project Administration Utility to create a QC project
8.How does u control the access to a QC project?
As a QC Admin, you can specify the users and the privileges each user will have. Privileges can also be set for groups.
9.What is a Table in QC project?
A table in QC project stores records of information about your test plan. It is part of a database.
10.How many built-in tables does QC have? What are they?
There are 6 tables accessible to the user via QC's Customize Project interface.
They are as follows:
-Test Table
-Test Step Table
-Run Table
-Test Set Table
-Defect Table
-Requirement Table
11.What is a User-Defined field? How many can u create?
A User-Defined field is a column in a QC table activated by the user to hold project specific information. You can create unto 99 user-defined fields in a QC project
12.What are the benefits of User-defined fields?
-Store project-specific information that may be inappropriate for built-in fields
-More ways to filter and sort project information
-More ways to customize graphs and reports.
13.What are the currently supported user defined field types?
-Number
-Date
-String
-User List
-Lookup List
14.Where are the user-defined fields added?
The user-defined fields are added to the Test Plan tab under "Other Information"
15.How do u launch winRunner ?
Test Script tab under Test Plan module lets u
-see any WinRunner code that exists for a test
-launch WinRunner with this script loaded.
16.How do u link requirements with a test?
We link requirements to a particular test using Requirements coverage tab.
17.What is a Test Plan Tree?
The Test Plan tree is a branching structure that allows you to organize
Your entire test plan visually.
18.What are the benefits of a test plan tree?
-Visually organize your tests
-Use different criteria for groups of tests
-object controls
-business tasks
-regression
-Insert Placeholders where needed
-Testing can start before all tests are created while keeping the plan orderly.
19.Why limit access to a Quality Center project?
You can enhance project security by assigning access privileges to all users.
20.What are Test Requirements?
Test Requirements refer to objectives or conditions that must be satisfied during testing
21.What are the categories of test requirements?
-Business Requirements->High-Level objectives of the customer requesting the product
-User requirements->Describe tasks the user must be able to accomplish with the product.
->Tasks captured in use cases or scenario descriptions.
-functional requirements->documented in a software requirements specification (SRS)
->Define the application's software functionality to enable users to
accomplish their tasks.
22.How do u check which tests are linked to a specific requirement?
Coverage View is used to check which tests are linked to a specific requirement.
Use this view to find untested requirements.
23.What does document view show?
document view displays columns for all requirements.
24.How do u customize requirements traa?
Open the "select columns" dialog to customize the requirements tree
25.What is an automated test?
An automated test is a recorded script of user actions that is played back on an application to verify correct functionality.
26.Can u use QC for automation?
Yes. QC integrates with WinRunner which is a testing tool that enables you to create and playback automated tests.
27.What are the 2 ways of adding automated tests?
-save a WR test to a Quality Center project.
-Convert a manual test to an automated one.
28.What is the importance of connecting a test case to test requirements?
-to see if all the requirements are covered.
-to map a test case associated with its requirements.
29.What are the types of graphs and reports in QC?
Progress graphs are available for all tables.
Summary graphs are available for all tables.
Test lab has additional graphs
-cross test set progress
-cross test set summary
Defects table also has Age graphs
Reports
-standard reports
-Document generator
-snapshots
-full reports
30.What are Progress Graphs?
Progress Graphs display specified information over a period of time.
Each testing phase has a progress graph
Requirements Phase -Data grouped by fields in the REQUIREMENT table.
Planning Phase -Data from TEST table
Execution Phase -Data from RUN table
Defects Phase -Data from DEFECT table
31.What are Summary Graphs?
Summary graphs show the accumulated value of specified data in the
Quality Center project. Each testing phase has a summary graph
User may select 2 fields for grouping- graph for each field, grouped by field
32.Why use a filter?
Filters allow you to restrict the scope of data displayed in the
graph, report or grid according to criteria that you specify.
When a filter is applied, only those records that meet the filter
Conditions are displayed. Filters are available for Graphs, Reports and Grids.
33.When would you generate project documents using the standard Reports?

Feature and when would you use the Document Generator?
We use standard Reports
-to view quick reports,
-to filter/sort and customize the fields,
-and to save it to a Web page file (.htm)
We use Document Generator
-for high customization involving index, tables & attachments
-to save and edit in MS Word format (.doc)
-to choose between snapshot and Full report.
34.What icon indicates whether a test has steps?
A footprint next to the manual and automated icons indicates whether a test has steps.
35.What is a Test Set?
A Test Set is a group of tests selected from the database to achieve a
Specific goal.
36.What is a Host Machine?
A host is a computer connected to a network, serving the project database, Which is able to execute automated tests.
37.What is a Scheduler?
The Scheduler is a QC feature that allows timed execution of automated tests. You can specify the date and time when a test will be run. This is useful for running large no. of tests unattended, such as overnight.
38.How does u open a Scheduler?
Goto-> Execution Flow tab. Right click a test to be scheduled and select "Test Run Schedule" from the pop-up menu.
39.Why use QC to track defects?
Maintains a centralized database
Standardize defect reporting
Prevent duplicate defects
Attach supporting information easily
Analyze defect data using reports and graphs.
40.How to prevent logging of duplicate defects?
Search the defect table for similar defects before entering a new one.
Use the "Find Similar" option to compare new defect and all other defects by:
Summary
Description and R&D comments.

Industrial Engineering Interview Question and Answers

Industrial Engineering Interview Question and Answers
What is Industrial engineering?Tell me about your subjects?
Industrial Engineering is concerned with the design of production systems. The Industrial Engineer analyzes and specifies integrated components of people, machines, and facilities to create efficient and effective systems that produce goods and services beneficial to mankind.
What is Production system?
Production system is a system in which there are some inputs and some transformation processes gives required output.
Why is Statistics Important in Industries?
It helps to knew problem and control good product and similar heart monitoring.
What is improving in Industrial engineering sense?
Improving is going through better work environment to reach higher productivity with better quality for the achievement of the scheduled plane. Improving is the elimination of Non-Value Added Tasks.
What is Productivity?
Productivity is a measure of how much input is required to produce a given output i.e. output/input is called productivity.

Javascript Interview Question and Answers

Javascript Interview Question and Answers
1.What is JavaScript?
JavaScript is a platform-independent,event-driven, interpreted client-side scripting and
programming language developed by Netscape Communications Corp. and Sun Microsystems.
2.How to read and write a file using javascript?
I/O operations like reading or writing a file is not possible with client-side javascript.
However , this can be done by coding a Java applet that reads files for the script.
3.How to detect the operating system on the client machine?
In order to detect the operating system on the client machine, the navigator.appVersion
string (property) should be used.
4.What can javascript programs do?
Generation of HTML pages on-the-fly without accessing the Web server.
The user can be given control over the browser like User input validation
Simple computations can be performed on the client's machine
The user's browser, OS, screen size, etc. can be detected
Date and Time Handling
5.How to set a HTML document's background color?
document.bgcolor property can be set to any appropriate color.
6.What does the "Access is Denied" IE error mean?
The "Access Denied" error in any browser is due to the following reason.
A javascript in one window or frame is tries to access another window or frame whose
document's domain is different from the document containing the script.
7.Is a javascript script faster than an ASP script?
Yes.Since javascript is a client-side script it does require the web server's help for its
computation,so it is always faster than any server-side script like ASP,PHP,etc..
8.Are Java and JavaScript the Same?
No.java and javascript are two different languages.
Java is a powerful object - oriented programming language like C++,C whereas Javascript is a
client-side scripting language with some limitations.
9.What is the difference between an alert box and a confirmation box
An alert box displays only one button which is the OK button whereas the Confirm box
displays two buttons namely OK and cancel.
10.What is a prompt box?
A prompt box allows the user to enter input by providing a text box.
11.What does javascript null mean?
Ans.The null value is a unique value representing no value or no object.
It implies no object,or null string,no valid boolean value,no number and no array object.
12.What does undefined value mean in javascript?
Ans.Undefined value means the variable used in the code doesnt exist or is not assigned any value or the property doesnt exist.
13.What is the difference between undefined value and null value?Ans.(i)Undefined value cannot be explicitly stated that is there is no keyword called undefined whereas null value has keyword called null
(ii)typeof undefined variable or property returns undefined whereas
typeof null value returns object

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Queues and Operations on it in C

Queues and Operations on it in C
A Queue is an ordered collection of items from which items may be deleted at one end (called the front of the queue) and into which items may be inserted at the other end (the rear of the queue).Queues are first in first out (FIFO) data structures.
Queues are used where the elements are processed in the order in which they arrive-for example the process queue, the print queue.
Operations on a queue:
InitQueue(Queue):
creates an empty queue
Join (Item):
inserts an item to the rear of the queue
Leave(Queue) :
removes an item from the front of the queue
isEmpty(Queue) :
returns true is the queue is empty
Queue overflow:
The condition resulting from trying to add an element onto a full queue.
if(!q.IsFull())
q.Join(item);
Queue underflow:
The condition resulting from trying to remove an element from an empty queue.
if(!q.IsEmpty())
q.Leave(item);

Stack and operations on It

Stack and operations on It
A stack is a list in which all insertions and deletions are made at one end, called the top of the stack. The last element to be inserted into the stack will be the first to be removed. Thus stacks are sometimes referred to as Last In First Out (LIFO) Data structures.
stacks are used in evaluating expressions, for keeping track of function calls and in recursion etc.
Operations on a stack:
InitStack(Stack) :
creates an empty stack.
Push (Item) :
pushes an item on the stack.
Pop(Stack):
removes the first item from the stack.
Top(Stack ):
returns the first item from the stack w/o removing it.
isEmpty(Stack):
returns true if the stack is empty.
IsFull(stack):
returns true if the stack is full.
Stack overflow:
The condition resulting from trying to push an element onto a full stack.
if(!stack.IsFull())
stack.Push(item);
Stack underflow:
The condition resulting from trying to pop an empty stack.
if(!stack.IsEmpty())
stack.Pop(item);

DataStructure Types

DataStructure Types
A data structure is a way of storing data in the memory so that it can be used efficiently.
Linear Data Structures:
A data structure is said to be linear if its elements form a sequence.
Examples:
• Arrays
• Linked Lists
• Stacks, Queues
Non linear Data Structures:
• Non linear data structures do not form a sequence.
• Non linear data structures are very flexiable and powerful datastructures and these can be used for wide variety of applications.
•Non linear data structures are most random in nature.
• programming on non linear data structures is difficult.
Examples:
• Trees
• Graphs

Operations on Linear Datastructures

Operations on Linear Datastructures
•Traversal:
Travel through the data structure.
•Search:
Traversal through the data structure for a given element.
•Insertion:
Adding new elements to the data structure.
•Deletion:
Removing an element from the data structure.
•Sorting:
Arranging the elements in some type of order.
•Merging:
Combining two similar data structures into one.

Can structures be assigned to variables and passed to and from functions?

Can structures be assigned to variables and passed to and from functions?
Yes, they can!
But note that when structures are passed, returned or assigned, the copying is done only at one level (The data pointed to by any pointer fields is not copied!.

Do Global variables start out as zero?

Do Global variables start out as zero?
Un initialized variables declared with the "static" keyword are initialized to zero. Such variables are implicitly initialized to the null pointer if they are pointers, and to 0.0F if they are floating point numbers.
Local variables start out containing garbage, unless they are explicitly initialized.
Memory obtained with malloc() and realloc() is likely to contain junk, and must be initialized. Memory obtained with calloc() is all-bits-0, but this is not necessarily useful for pointer or floating-point values (This is in contrast to Global pointers and Global floating point numbers, which start as zeroes of the right type).

Declaration and the definition of a variable difference?

Declaration and the definition of a variable difference?
The definition is the one that actually allocates space, and provides an initialization value, if any.
There can be many declarations, but there must be exactly one definition. A definition tells the compiler to set aside storage for the variable. A declaration makes the variable known to parts of the program that may wish to use it. A variable might be defined and declared in the same statement.

C Bit fields Interview Questions

C Bit fields Interview Questions
1)Write a C program to count bits set in an integer?
2)What purpose do the bitwise and, or, xor and the shift operators serve?
3)How to reverse the bits in an integer?
4)Check if the 20th bit of a 32 bit integer is on or off?
5)How to reverse the odd bits of an integer?
6)How would you count the number of bits set in a floating point number?

C Pointers Interview Questions

C Pointer Interview Questions
1)What does *p++ do? Does it increment p or the value pointed by p?
2)What is a NULL pointer? How is it different from an unitialized pointer? How is a NULL pointer defined?
3)What is a null pointer assignment error?
4)Does an array always get converted to a pointer? What is the difference between arr and &arr? How does one declare a pointer to an entire array?
5)Is the cast to malloc() required at all?
6)What does malloc() , calloc(), realloc(), free() do? What are the common problems with malloc()? Is there a way to find out how much memory a pointer was allocated?
7)What's the difference between const char *p, char * const p and const char * const p?
8)What is a void pointer? Why can't we perform arithmetic on a void * pointer?
9)What do Segmentation fault, access violation, core dump and Bus error mean?
10)What is the difference between an array of pointers and a pointer to an array?
11)What is a memory leak?
12)What are brk() and sbrk() used for? How are they different from malloc()?
13)What is a dangling pointer? What are reference counters with respect to pointers?
14)What do pointers contain?
15)Is *(*(p+i)+j) is equivalent to p[i][j]? Is num[i] == i[num] == *(num + i) == *(i + num)?
16)What operations are valid on pointers? When does one get the Illegal use of pointer in function error?
17)What are near, far and huge pointers?
18)What is the difference between malloc() and calloc()?
19)Why is sizeof() an operator and not a function?
20)What is an opaque pointer?
21)What are the common causes of pointer bugs?

What is ALV ABAP List Viewer

What is ALV ABAP List Viewer
There are several ways to create report in SAP, such as SAP ABAP Query, ALV (ABAP list viewer), SmartForms, SAP BW, using Adobe interactive forms. ALV is still being used as the tool to create reports in SAP, whether a standard listing report to a complex report format.
A lot of reports for the release of SAP 4.0 and later are developed using ALV, even many older standard R/3 reports have been modified into ALV format because if offers many advantages compare to any other report formats.
So What is SAP ALV?
ALV is a set of function modules, sub routines that are created to a program code in tcode SE38. The programming language to create the AVL report is called ABAP (Advanced Business Application Programming). ALV can gives you a standard user interface and list format for ABAP reports that way it can help you reduce even eliminate redundant functions.Using the ALV will enhance the functionality provided with reports and decreasing the development time up to 40%.
An ALV report can be displayed as grid format and also list format, when you’re using the Grid format you can have all the capabilities such as download the report into Excel or flat file format, drag and drop columns, sort function, filter function even sum functions.
By using ALV you can also have more flexibility and features compare with report generated using SAP ABAP QUERY (SQ01), the performance is also much better then using SAP Query, that’s why a lot of companies are migrating their SAP query report into ABAP list viewer format.

So the main purpose of creating ALV is just for reporting, but it offers more powerful features and more complex data display compare with SAP query, the best thing about ALV report is it’s using ABAP programming language that is also being used in almost all of SAP related products.

Agilent technologies Interview questions

Agilent technologies Interview questions
1)What is abstract function?
2)What is the difference between copy by value and copy by reference?
3)What are various searching techniques? explain
4)what is binary search? what is it complexity?
5)What is good object oriented language?
6)what are different object oriented features?
7)Difference between object and class?
8)difference between c++ and c struct and class?Explain
9)What would you do if you were given a project and couldn't finish it on time?
10)Write program to count number of bits in a integer?

Impetus Dot net Interview Questions

Impetus Dot net Interview Questions
1)What’s a proxy of the server object in .NET Remoting
2)What are remotable objects in .NET Remoting
3)What are channels in .NET Remoting
4)What security measures exist for .NET Remoting in System.Runtime.Remoting
5)What is a formatter

Investment Manager Interview Questions

Investment Manager Interview Questions
Investment manager is a typical job the interview questions given below may not be as same but thease are just samples
Some typical sample examples May be like below:
1.Tell me about yourself.
2.Why do you want investment management?
3.What qualities make for a good analyst?
4.What skills can you offer as an analyst? Any industry-specific ones?
5.What industry do you want to cover? Any preference for value or growth?
6.How would you analyze the industry?
7.Pitch a stock to me.
This is the “Pitch Me a Stock” portion of the IM interview. BEFORE walking into an IM interview you should:
a)Choose at least 2 stocks to buy & 2 stocks to short
b)KNOW these companies
a.Major ratios
b.Comparable companies
c.The competitive landscape of the industry in which these stocks reside (basically a Porter’s 5 Forces exercise)
d.Build your own model, including income statement, balance sheet & cashflow statement. This will FORCE you to get to really know the company, its drivers, major assumptions and greatest risks.
e.Know the opinion of the stock on the Street and how your opinion either agrees or dissents with the consensus.
f.The effect of macroeconomic factors on the stock & its industry.
g.Major news events in the sector.
TIP:If you pick a well-known, widely covered stock it will certainly be one on which the interviewer has some sort of opinion even if he/her does not cover the stock. While this will certainly allow for a fluid discussion, it will ensure that you have to be CONFIDENT in your knowledge of the stock. Picking an obscure stock is a way for you to show your explanatory powers and lessen the chances that the interviewer knows everything there is to know about that stock. However, this might also work against you as the interviewer might lose interest in the story.
REMEMBER: They are attempting to assess:
(1)How much you prepared for the interview.
(2)If you can think quickly on your feet.
(3)If you can communicate well and take criticism.
8.How did you arrive at your target price?
9.What is your investment philosophy?
10.Do you own/have you owned any stocks? Tell me about them. Why did you buy/sell them?
11.Did you pitch a stock to the IMC fund members? What was the outcome?
12.Why do you want to work for us?
13.Why do you want to live in the (firm’s location) area? What ties to you have to the area?
14.What other firms are you looking at?
15.Where do you think the market is going? Why?

Asset Management Interview Questions

Asset Management Interview Questions
1.Q :"Tell me about yourself."
HINT:Talk about personal characteristics and skills that translate into career strengths.
A :"I love to jump into projects with both feet. I like sitting in front of a computer or at my desk for hours at a time thinking about a problem, plotting out the solution, making the presentation. Object-oriented technology [or any new technology] is my newest challenge."
2.Q:"What are your greatest strengths?"
HINT:Discuss specific assets the employer desires.
A : "Pleasant personality/politeness, loyalty, willingness to work hard, motivation, persistence, tenacity."
3.Q:"What are your weaknesses?"
HINT : There are a couple of approaches you can take with the "weakness" question. Whatever you do, do not mention any true weakness, such as, "I have a hard time getting to work on time." The ability to answer the question properly is half of what the manager is looking for. One strategy is to give a personal weakness that is considered a professional strength.
A : "I'm so compulsive about my work, that I can't stop until the job is perfect." Another approach is to turn the question into a discussion of your current professional goals. Example: "I plan to improve myself this year by taking a class in public speaking." Choose a peripheral weakness -- one that you may really need to work on, but not one that would disqualify you for the position in question.
4.Q:"Why do you want to work here at XYZ Company?"
HINT : Be very careful with this one. If you've researched this company then you can say something specific, like "object-oriented relational database technology really turns me on." Showing that you have done some research marks you as a self-starter with a solid grasp of the big picture.
A : "I've been following XYZ's growth and I want a company that I can grow with. Your company is solid and stable, with a growth rate of X percent last year and a great competitive position" Or, "I like a start-up environment where I can really make a difference."
5.Q:"What books and/or magazines do you read?"
HINT : Obviously, a technical or trade journal is one answer they are looking for. The books you've read tells the manager something about your personality.
A : Whatever you do, don't say, "I don't like to read."
6.Q:"What were your favorite subjects in school and why?"
HINT : Of course, if your major is Computer Science you want to mention some of your computer science classes. You might mention other related subjects. For example, if you're interviewing at a financial services firm, you might discuss why you liked your accounting or finance classes. If you did any unusual or special projects in that area, you would bring that up now. Mention anything that shows a keen interest this employer's particular kind of work.
If you are interviewing at a software or integration consulting firm, somewhere during the interview you would want to mention that you truly enjoy working with people. To illustrate this point, mention any volunteer work or part-time jobs you might have held anytime in your life that involved interacting with people. For example, "I volunteered at a homeless shelter during the holidays giving out food." This shows that you genuinely care about others and like giving back to the community, and that you would go out of your way for a boss or a coworker.
7.Q:"How do you let off steam after you've completed a tough project? What do you like to do in your spare time?"
HINT : Managers like well-rounded employees; your answer to this question illustrates some of your personal qualities. If you can mention pastimes that would be an asset to the job you are seeking, so much the better. For example, a bridge player must possess valuable analytical skills. Whatever your favorite hobby is, strong outside interests round out your character.
A : "For relaxation I like to read a mystery novel, go swimming, go skiing, make pottery . . ."

Basic Electrical Interview Questions

Basic Electrical Interview Questions
1)Give two basic speed control scheme of DC shunt motor?
Answer:1. By using flux control method:in this method a rheostat is connected across the field winding to control the field current.so by changing the current the flux produced by the field winding can be changed, and since speed is inversely proportional to flux speed can be controlled 2.armature control method:in this method a rheostat is connected across armature winding by varying the resistance the value of resistive drop(IaRa)can be varied,and since speed is directly proportional to Eb-IaRa the speed can be controlled.
2)What is the principle of motor?
Answer:Whenever a current carrying conductor is placed in an magnetic field it produce turning or twisting movement is called as torque.
3)What is meant by armature reaction?
Answer:The effect of armature flu to main flux is called armature reaction. The armature flux may support main flux or opposes main flux.
4)Give two basic speed control scheme of DC shunt motor?
Answer:1. By using flux control method:in this method a rheostat is connected across the field winding to control the field current.so by changing the current the flux produced by the field winding can be changed, and since speed is inversely proportional to flux speed can be controlled 2.armature control method:in this method a rheostat is connected across armature wdg.by varying the resistance the value of resistive drop(IaRa)can be varied,and since speed is directly proportional to Eb-IaRa the speed can be controlled.
5)What is the difference between synchronous generator & asynchronous generator?
Answer:In simple, synchronous generator supply's both active and reactive power but asynchronous generator(induction generator) supply's only active power and observe reactive power for magnetizing.This type of generators are used in windmills.
6)What is the Polarization index value ? (pi value)and simple definition of polarization index ?
Answer:Its ratio between insulation resistance(IR)i.e meggar value
for 10min to insulation resistance for 1 min. It ranges from 5-7 for new motors & normally for motor to be in good condition it should be Greater than 2.5 .
7)Why syn. generators r used for the production of electricity?
Answer:synchronous machines have capability to work on different power factor(or say
different imaginary power varying the field emf. Hence syn. generators r used for the production of electricity.
8)What is the difference between synchronous generator & asynchronous generator?
Answer:In simple, synchronous generator supply's both active and reactive power but asynchronous generator(induction generator) supply's only active power and observe reactive power for magnetizing.This type of generators are used in windmills.
9)1 ton is equal to how many watts?
Answer:1 ton = 12000 BTU/hr and to convert BTU/hr to horsepower,
12,000 * 0.0003929 = 4.715 hp therefore 1 ton = 4.715*.746 = 3.5 KW.
10)Why syn. generators r used for the production of electricity?
Answer:Synchronous machines have capability to work on differentpower factor(or say
different imaginary pow varying the field emf. Hence syn. generators r used for the production of electricity.
11)Enlist types of dc generator?
Answer:D.C.Generators are classified into two types 1)separatly exicted d.c.generator 2)self exicted d.c.generator, which is further classified into;1)series 2)shunt and
3)compound(which is further classified into cumulative and differential).

Electrical interview faqs Part 2

Electrical interview faqs Part 2
1)Why, when birds sit on transmission lines or current wires doesn't get shock?
Answer:Its true that if birds touch the single one line (phase or neutral) they don't get electrical shock... if birds touch 2 lines than the circuit is closed and they get electrical shock.. so if a human touch single one line(phase) then he doesn't get shock if he is in the air (not touching - standing on the ground if he is standing on the ground then touching the line (phase) he will get a shock because the ground on what we standing is like line (ground bed - like neutral)। and in the most of electric lines the neutral is grounded..so that means that human who touch the line closes the circuit between phase and neutral.
2)What is meant by armature reaction?
Answer:The effect of armature flu to main flux is called armature reaction. The armature flux may support main flux or opposes main flux.
3)What happen if we give 220 volts dc supply to d bulb r tube light?
Answer:Bulbs [devices] for AC are designed to operate such that it offers high impedance to AC supply. Normally they have low resistance. When DC supply is applied, due to low resistance, the current through lamp would be so high that it may damage the bulb element.
4)Which motor has high Starting Torque and Staring current DC motor, Induction motor or Synchronous motor?
Answer:DC Series motor has high starting torque. We can not start the Induction motor and Synchronous motors on load, but can not start the DC series motor without load.
5)What is ACSR cable and where we use it?
Answer:ACSR means Aluminium conductor steel reinforced, this conductor is used in transmission & distribution.
6)What is vaccum currcuit breaker.define with cause and where be use it Device?
Answer:A breaker is normally used to break a ciruit. while breaking the circuit, the contact terminals will be separated. At the time of seperation an air gap is formed in between the terminals. Due to existing current flow the air in the gap is ionised and results in the arc. various mediums are used to quench this arc in respective CB's. but in VCB the medium is vaccum gas. since the air in the CB is having vaccum pressure the arc formation is interrupted. VCB's can be used upto 11kv.
7)What will happen when power factor is leading in distribution of power?
Answer:If their is high power factor, i.e if the power factor is close to one:
1.losses in form of heat will be reduced,
2.cable becomes less bulky and easy to carry, and very
cheap to afford, &
3. it also reduces over heating of tranformers.
8)Whats the one main difference between UPS & inverter ? And electrical engineering & electronics engineering ?
Answer:uninterrupt power supply is mainly use for short time . means according to ups VA it gives backup. ups is also two types : on line and offline . online ups having high volt and amp for long time backup with with high dc voltage.but ups start with 12v dc with 7 amp. but inverter is startwith 12v,24,dc to 36v dc and 120amp to 180amp battery with long time backup.
9)What is 2 phase motor?
Answer:A two phase motor is a motor with the the starting winding and the running winding have a phase split. e.g;ac servo motor.where the auxiliary winding and the control winding have a phase split of 90 degree.
10)Advantages of vvvf drives over non vvvf drives for EOT cranes?
Answer:1.smooth start and stop.
2.no jerking of load.
3.exact posiitoning
4.better protection for motor.
5.high/low speed selection.
6.reliability of break shoe.
7.programmable break control.
8.easy circutry
9.reduction in controls
10.increases motor life
11)What is the significance of vector grouping in Power Transformers?
Answer:Every power transformer has a vector group listed by its manufacturer. Fundamentally it tells you the information about how the windings are connected (delta or wye) and the phace difference betweent the current and voltage. EG. DYN11 means Delta primary, Wye Secondry and the current is at 11 o clock reffered to the voltage.
12)Which type of A.C motor is used in the fan (ceiling fan, exhaust fan, padestal fan, bracket fan etc) which are find in the houses ?
Answer:Its Single Phase induction motor which mostly squirrel cage rotor and are capacitor start capacitor run.

Electrical interview Faqs

Electrical interview Faqs
1)What is electric traction?
Answer:Traction means using the electric power for traction system i.e. for railways,trams, trolleys etc. electric traction means use of the electricity for all these . now a days, magnetic traction is also used for bullet trains. basically dc motors are used for electric traction systems.
2)How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil?
Answer:It's possible by means of Electronic choke.otherwise it's not possible to ionize the particles in tube. light, with normal voltage.
3)What is "pu" in electrical engineering?
Answer:Pu stands for per unit and this will be used in power system single line diagram there it is like a huge electrical circuit with no of componenes (generators, transformers, loads) with different ratings (in MVA and KV). To bring all the ratings into common platform we use pu concept in which, in general largest MVA and KV ratings of the component is considered as base values, then all other component ratings will get back into this basis.Those values are called as pu values. (p.u=actual value/base value).
4)Operation carried out in Thermal power station?
Answer:The water is obtained in the boiler and the coal is burnt so that steam is obtained this steam is allowed to hit the turbine , the turbine which is coupled with the generator generates the electricity
5)Why link is provided in neutral of an ac circuit and fuse in phase of ac circuit?
Answer:Link is provided at a Neutral common point in the circuit from which various connection are taken for the individual control circuit and so it is given in a link form to withstand high Amps. But in the case of Fuse in the Phase of AC circuit it is designed such that the fuse rating is calculated for the particular circuit (i.e load) only.So if any malfunction happen the fuse connected in the particular control circuit alone will blow off.
6)what is the diff. btwn. electronic regulator and ordinary rheostat regulator for fans?
Answer:The difference between the electronic and ordinary regulator is that in electronic reg. power losses are less because as we decrease the speed the electronic reg. give the power needed for that particular speed but in case of ordinary rheostat type reg. the power wastage is same for every speed and no power is saved.In electronic regulator triac is employed for speed control.by varying the firing angle speed is controlled but in rheostatic control resistance is decreased by steps to achieve speed control.
7)How tube light circuit is connected and how it works?
Answer:A choke is connected in one end of the tube light and a starter is in series with the circuit. When supply is provided ,the starter will interrupt the supply cycle of AC. Due to the sudden change of supply the chock will generate around 1000volts . This volt will capable of to break the electrons inside the tube to make electron flow. once the current passes through the tube the starter circuit will be out of part. now there is no change of supply causes choke voltage normalized and act as minimize the current.
8)whats is MARX CIRCUIT?
Answer:It is used with generators for charging a number of capacitor in parallel and discharging them in series.It is used when voltage required for testing is higher than the available.
9)What is encoder, how it function?
Answer:An encoder is a device used to change a signal (such as a bitstream) or data into a code. The code may serve any of a number of purposes such as compressing information for transmission or storage, encrypting or adding redundancies to the input code, or translating from one code to another. This is usually done by means of a programmed algorithm,especially if any part is digital, while most analog encoding is done with analog circuitry.
10)What are the advantages of speed control using thyristor?
Answer:Advantages :1. Fast Switching Characterstics than Mosfet, BJT, IGBT 2. Low cost 3. Higher Accurate.
11)Why Human body feel Electric shock ?? n in an Electric train during running , We did nt feel any Shock ? why?
Answer:Unfortunately our body is a pretty good conductor of electricity, The golden rule is Current takes the lowest resistant path if you have insulation to our feet as the circuit is not complete (wearing rubber footwear which doing some repairs is advisable as our footwear is a high resistance path not much current flows through our body).The electric train is well insulated from its electrical system.
12)what is the principle of motor?
Answer:Whenever a current carrying conductor is placed in an magnetic field it produce turning or twisting movemnt is called as torque.

Os concepts Interview Questions and Faqs

Os Interview Questions and Faqs
1)What is MUTEX ?
2)What isthe difference between a 'thread' and a 'process'?
3)What is INODE?
4)Explain the working of Virtual Memory.
5)How does Windows NT supports Multitasking?
6)Explain the Unix Kernel.
7)What is Concurrency? Expain with example Deadlock and Starvation.
8)What are your solution strategies for "Dining Philosophers Problem" ?
9)Explain Memory Partitioning, Paging, Segmentation.
10)Explain Scheduling.
11)Operating System Security.
12)What is Semaphore?
13)Explain the following file systems : NTFS, Macintosh(HPFS), FAT .
14)What are the different process states?
15)What is Marshalling?
16)Define and explain COM?
17)What is Marshalling?
18)Difference - Loading and Linking ?
19)What are the basic functions of an operating system?
20)Explain briefly about, processor, assembler, compiler, loader, linker and the functions executed by them.
21)What are the difference phases of software development? Explain briefly?
22)Differentiate between RAM and ROM?
23)What is DRAM? In which form does it store data?
24)What is cache memory?
25)What is hard disk and what is its purpose?
26)Differentiate between Complier and Interpreter?
27)What are the different tasks of Lexical analysis?
28)What are the different functions of Syntax phase, Sheduler?
29)What are the main difference between Micro-Controller and Micro- Processor?
30)Describe different job scheduling in operating systems.
31)What is a Real-Time System ?
32)What is the difference between Hard and Soft real-time systems ?
33)What is a mission critical system ?
34)What is the important aspect of a real-time system ?
35)If two processes which shares same system memory and system clock in a distributed system, What is it called?
36)What is the state of the processor, when a process is waiting for some event to occur?
37)What do you mean by deadlock?
38)Explain the difference between microkernel and macro kernel.
Give an example of microkernel.
39)When would you choose bottom up methodology?
40)When would you choose top down methodology?
41)Write a small dc shell script to find number of FF in the design.
42)Why paging is used ?
43)Which is the best page replacement algorithm and Why? How much time is spent usually in each phases and why?
44)Difference between Primary storage and secondary storage?
45)What is multi tasking, multi programming, multi threading?
46)Difference between multi threading and multi tasking?
47)What is software life cycle?
48)Demand paging, page faults, replacement algorithms, thrashing, etc.
49)Explain about paged segmentation and segment paging
50)While running DOS on a PC, which command would be used to duplicate the entire diskette?

8086 Interview Questions Faqs

8086 Interview Questions Faqs
1)What are the flags in 8086?
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
2)What are the various interrupts in 8086?
Maskable interrupts, Non-Maskable interrupts.
3)What is meant by Maskable interrupts?
An interrupt that can be turned off by the programmer is known as Maskable interrupt.
4)What is Non-Maskable interrupts?
An interrupt which can be never be turned off (ie.disabled) is known as Non-Maskable interrupt.
5)Which interrupts are generally used for critical events?
Non-Maskable interrupts are used in critical events. Such as Power failure, Emergency, Shut off etc.,
6)Give examples for Maskable interrupts?
RST 7.5, RST6.5, RST5.5 are Maskable interrupts
7)Give example for Non-Maskable interrupts?
Trap is known as Non-Maskable interrupts, which is used in emergency condition.
8)What is the Maximum clock frequency in 8086?
5 Mhz is the Maximum clock frequency in 8086.
9)What are the various segment registers in 8086?
Code, Data, Stack, Extra Segment registers in 8086.
10)Which Stack is used in 8086?
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrived first.
11)What are the address lines for the software interrupts?
RST0 0000 H
RST1 0008 H
RST2 0010 H
RST3 0018 H
RST4 0020 H
RST5 0028 H
RST6 0030 H
RST7 0038 H
12)What is SIM and RIM instructions?
SIM is Set Interrupt Mask. Used to mask the hardware interrupts. RIM is Read Interrupt Mask. Used to check whether the interrupt is Masked or not.
13)Which is the tool used to connect the user and the computer? Interpreter is the tool used to connect the user and the tool.
14)What is the position of the Stack Pointer after the PUSH instruction? The address line is 02 less than the earlier value.
15)What is the position of the Stack Pointer after the POP instruction? The address line is 02 greater than the earlier value.
16)Logic calculations are done in which type of registers?Accumulator is the register in which Arithmetic and Logic calculations are done.
17)What are the different functional units in 8086?
Bus Interface Unit and Execution unit, are the two different functional units in 8086.
18)Give examples for Micro controller?
Z80, Intel MSC51 &96, Motorola are the best examples of Microcontroller.
19)What is meant by cross-compiler?
A program runs on one machine and executes on another is called as cross-compiler.
20)What are the address lines for the hardware interrupts?
RST 7.5 003C H
RST 6.5 0034 H
RST 5.5 002C H
TRAP 0024 H
20)Which Segment is used to store interrupt and subroutine return address registers?
Stack Segment in segment register is used to store interrupt and subroutine return address registers.
21)Which Flags can be set or reset by the programmer and also used to control the operation of the processor?
Trace Flag, Interrupt Flag, Direction Flag.
22)What does EU do?
Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.
23)Which microprocessor accepts the program written for 8086 without any changes?
8088 is that processor.
24)What is the difference between 8086 and 8088?
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086.
 
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