Here is the programs how they asked
1) write a program to insert a node at rear end in double linked list?
2) write a program to reverse the lined list?
3) write a program to find substring using pointers?
4) write a program for palindrome using recursion ?
5) write a program for to find repeated letter in given file?
some technical questions
1.Describe how procedure of c program -like compilation every thing...
2.what is macro write a program to find largest b/w 3 elements by using macro?
3.diff b/w in declaration and definition?
4.tell memory structure allocation process and how it works?
5.what is DMA? what it means?
6.what is function pointer?
7.what is difference b/w structure and union?
8.write a program for conversion of little endian to big endian?
9.what is splay tress and some question about tress?
10.can u write a print a statement with out using print function ?
11.They told me to write a program to find mid point of rectangle by just giving x1 x2 and y1 y2 ?