How many questions can you answer about Linux?

Can 1.memcmp be used to compare structures? The difference between strcmp and memcpy?

2. What are the differences between soft interrupts and hard interrupts?

3. How are interprocess communications?

4.kmalloc and Vmalloc difference?

5. What are the differences in memory access between the mmap of the application layer and the vmalloc of the kernel state?

6. Does the user state have direct access to the kernel state memory?

How does MSI interrupt in 7.PCIe trigger?

8. How do I know the size of a file?

What is the difference between 9.spin_lock in single-core and multi-core mode?

10. What is wait time for multi-process?

11. If the process is stuck, how can I see where the card is?

12. How to troubleshoot downtime problems?

13. How does the variable parameter work? How should it be implemented?

What is the difference between 14.select and poll?

15. Talk about the understanding of section-page management?

16. What is a hash table used for?

What is the implementation principle of the 17.core file?

18.fork return 0 and greater than 0 are processes respectively?

19. What is the heap and stack used to do when the program executes?

20. What are the differences between threads and processes?

21. How to optimize the performance, how to increase the boot speed?

How many questions can you answer about Linux?