Interview Experience

I am sharing here some of the interview questions that I faced in this post.

C
1. What is volatile and why is it used?
2. What is the necessity for a const qualifier?
3. What is little Endian and big Endian? Write a code to convert little endian to big endian and vice versa.
4. Write a single line macro to do the above conversion
5. Declare a structure.
6. Structure has been declared with int; char; int; char members in same order. What is the size allocated for it in memory? Is there a way to optimise it?
7. Implement a stack using linked list.
8. String copy without using default functions from string.h
9. How to toggle a bit in a number?
10. Convert decimal to binary
11. Verify if a linked list is a palindrome or not.
12. What will happen if there is
main()
{
printf("Hello");
while(1);
}
13. What is the difference between char * const ptr, char const * ptr and const char * ptr??
14. What are preprocessor macros?
15. What is compilation and linking?
16. Is a global variable extern?
17. Can a static variable be made extern?
18. What are static variables and static functions?
19. Is a MACRO advantageous or a function?
20. What is difference between macro and inline function?
21. Reverse a linked list.
22. Find the middle element of linked list in a single traversal.
23. What are the differences between malloc and calloc?
24. Where are static and global variables stored in the memory?
25. How can a multi threaded application be written?

Linux
1. What is a kernel?
2. What is difference between user space and kernel space?
3. Why kernel mode of operation is required?
4. What happens when a system call is made?
5. How a kernel can be live patched? (Ksplice)
6. sed related, awk related question
7. how to write a module?
8. How to write a system call? steps
9. How the boot time of an embedded machine can be reduced?
10. How are embedded distribution different from regular distributions?
11. rpm and all its options
12. patch and all its options
13. How to debug a shell script/binary?
14. what are different mechanisms of inter process communications?
15. What is procfs and sysfs?
16. The ways to set ip for an interface.
17. What all kind of tests LTP covers?
18. What is the need of asmlinkage?
19. How many arguments can be passed to a system call?
20. yocto related questions.

Agile
1. TDD
2. Iterative model

I have added all the questions that I could remember. As and when I remember, I will update the post.

Thanks,
Gomathi