1. What is the difference in features between kernel 2.2, 2.4 and 2.6 ?

2. What are Static and Shared libraries ?

3. What is dynamic linking ? What is static linking ?

4. What are the advantages of Dynamic linking or Shared libraries ?

5. Does gcc search for both static and shared libraries ? Which is searched initially by gcc compiler ?

6. What should be done for Shared library based linking in gcc ?

7. What should be done for static library based linking in gcc ?

8. What is object file and what are symbols ?

9. Can you tell the memory layout based on Data,BSS,HEAP and STACK ?

10. What are the ways in which linux kernel can be compiled ?

11. How will get the driver added into the kernel ? What are Kconfig files ?

12. What is a kernel module ?

13. What is the difference between insmod and modprobe ?

14. How will you list the modules ?

15. How do you get the list of currently available drivers ?

16. How will you Access userspace memory from kernel ? What are the various methods ?

17. What is the use of ioctl(inode,file,cmd,arg) ApI ?

18. What is the use of the poll(file, polltable) API ?

19. What is the use of file->private_data in a device driver structure ?

20. What is a device number ?

21. What are the two types of devices drivers from VFS point of view ?

22. What are character devices ?

23. How does the character device driver adds and remove itself from the kernel ?

What is the use of register_chrdev and unregister_chrdev ?

24. What is the role of interrupts in a device driver ? How are interrupts handled in device driver ?

25. How will you make interrupt handlers as fast as possible ?

26. What are the types of softirqs ? 

27. Difference between Timer Softirq and Tasklet Softirq ?

28. What are tasklets ? How are they activated ? when and How are they initialized ?

29. What is task_struct and how are task states maintained ?

30. What is rwlock and spinlock ? Briefly explain about both of them ?

31. When will you use rwlock instead of spinlock ?

32. Can spinlock/rwlock be used in Interrupt handler ?

33. Tell about the Memory Layout of a Process in Linux .

34. How will you trace the system calls made into the kernel of lInux ?

35. What is mmap ? MMAP & malloc ? MMAP & brk ? MMAP adv & dis-adv.

36. Tell the relation between Malloc and MMAP

37. Advantages of MMAP over Read ?

38. Tell the role of brk() in malloc / Tell the relation between heap and brk?

39. Example of using MMAP and MUNMAP in C ?

40. Tell about the method/steps in Linux Kernel Compilation.

41. What is Kmalloc and how does it differ from normal malloc ? or Why can't we use malloc in kernel code ?

42. What happens as soon as a packet arrives from the network in Linux ?

43. What is a stack frame, stack pointer & frame pointer ?

44. What is a profiler ? Which one have you used ?

45. How do you determine the direction of stack growth ?

1. How are FLIHs and SLIHs termed in Linux ?

2. What is the main drawback for not considering Linux as realtime ?

3. What is the type of scheduler used in Linux Kernel 2.5 ?

4. What are the types of scheduler used in Linux Kernel 2.6 to 2.6.23 and after Linux kernel 2.6.23 ?

5. CFS scheduler in Linux is based on red-black tree - True / False ?

6. O(1) scheduler in Linux is based on run queues - True / False ?

7. Is the architecture of linux kernel monolithic / microkernel ?

8. How will you trace the system calls made into the kernel of lInux ?

9. Tell about the Linux Kernel Compilation method ?

10. What is 'make mrproper' and how is it different from 'make clean' ?

11. What is Kmalloc and how does it differ from normal malloc ? or Why can't we use malloc in kernel code ?

12. Does the scheduler assign a zombie state to a process ?

13. Brief up 'vmalloc' vs 'kmalloc' ?

14. Brief up 'malloc' vs 'kmalloc' ?

15. How modules begin and end in LInux ? Tell the difference between Modules and Program ?

16. What is mmap ?

17. What are the advantages of mmap over read ?

18. Most of Unix kernels are monolithic - True / False ?

19. Why is microkernel slower than monolithic kernel ?

20. What are the advantges of microkernel over monolithic kernel ?

21. What is a 'Module' ?

22. What are the main advantages of using a 'Module' ?

23. Once linked in, the object code of a 'module' is equivalent to the object code of the statically linked kernel - True / False ?

24. What are the limitations of hard links / What are advantages of soft links ?

25. Unix Kernels are Reentrant - True / False ?

26. What is Kernel Control Path ?

27. What is the drawback in using semaphore for synchronization ? How does spinlock help in overcoming it ?

28. What does a semaphore consist of ? and What does a spinlock consist of ?

29. Why spinlocks are useless in uniprocessor systems ?

30. What are the two kinds of system events ?