Different Blackbox testing interview questions

Different Blackbox testing interview questions
Blackbox Techniques:
Equivalence Class
Boundary Value Analysis
Error Guessing
Equivalence Class
For each piece of the specification, generate one or more equivalence class.
Label the classes as “valid” or “invalid”.
Generate one test case for each Invalid Equivalence Class.
Generate a test case that covers as many as possible equivalence classes.
Boundary values Analysis
Generate test cases for the boundary values.
Minimum value, minimum value+1, minimum value-1
Maximum value, Maximum value +1, Maximum value –1

Error Guessing:

Generate test cases against to the specification
Eg:For a text field it takes age limits only 40-60. But here we write test cases against to that like 30, 20, 70 & 65.

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