Operating system interview questions

1. What is an interrupt Vector ?

2. How CPUs find the ISR and distinguish between the various devices ?

Is it possible for two devices to share an interrupt request line but have different ISR for those two devices ?

3. What is page fault ?

4. Which hardware unit of processor detects the page fault ?

5. Difference between Monolithic kernel, Micro kernel and Hybrid kernel ?

6. What is Interrupt Descriptor Table (IDT) ?

7. Main Difference between a process and thread ?

8. Threads are lightweight. Why and How ?

9. STACK growth is in downward direction in the case of 80×86 processor – True/False.

10. What is the difference between Multiprogramming and Multiprocessing ?

11. What is parallel programming ?

12. What is a time slice ?

13. What is the difference between multiprogramming and multiprocessing ?

14. What is parallel programming ?

15. What is ABI (Application Binary Interface ) ?

16. What is the layout of a program image in main memory ?

17. What are the types of IPC mechanisms ?

18. Tell about shared memory ? Does it provide locking mechanism ? When is it typically used ?

19. What are the types of synchronization problems and what are the resources that can cause such problems ?

20. What is data race ?

21. What is Indefinite Postponement / Indefinite blocking or starvation ?

22. What is Deadlock ?

23. What are the synchronization relationships that are present in a multithreaded or mulitprogramming applications ?

24. How Many Processes or Threads Are Enough for an application ?

25. How does memory segmentation help in memory protection ?