IBM ISL Interview

 

This interview is for AIX testing position.

Round – 1 was around 2 hours. it includes C, datastructures, OS , multithreading , Linux, Shell.

1. Difference between process & threads
2. How the following system calls will work: fork , read, open , write.
3. Difference between open & fopen.
4. A program that creates a thread.
5. A program with multi thread
6. A program with  the implementation of thread join & synchronization.

OS concepts & linux
7. Fragmentation & types
8. Paging & type  of allocation
9. Scheduling
10. Process memory layout
11. Process states
12. Difference between zombie & orphan process
13. How to find zombie & orphan process in linux using commands.
14. uses of chown , chmod, df , free, top, /proc & some other linux admin commands.
15. question s in sed , awk , grep
16. pipe & examples
17. writing simple shell scripting programs

C programs
18. Program to reverse a string (with & without recursion)
19. Program to reverse a linked list
20. Program to add two numbers (in linked list)
21. program to sort the linked list (own logic)
22. function call by value, call by reference
23. program to swap bytes in an integer
24. questions in padding
25. questions in pointers

26. what is meant by system testing
27. what all testing i have done in previous experience

Round –2 : it was around half an hour. it consists of unix & shell questions.

1. System programming questions like, using a system call in a program
2. writing makefiles
3. shell script program;
Input: hello
Output: h  e  l l  0
4. some other simple shell script programs & some command functionalities in linux

Round – 3 : It was around half an hour. It is a HR + Manager round

1. some questions about testing
2. why leaving the old company
3. why IBM ISL
4. Other general HQ questions