After applying through a job portal, got a mail with link for video interview. There were 23 questions, apart from tell me about yourself. Some questions to be explained in video and some are programming.

1. What are the various memory segments of a C program?

2. What are the design constraints while implementing an ISR?

3. What are the contents of vtable?

4. What is a copy constructor and why do we need it?

5. How to achieve Encapsulation in C?

6. define function pointer returning char* and takes two int arguments

7. Define and declaration of a HW Register of type integer to be placed at 0x41038000; volatile int *HW_Register; HW_Register = (uint32_t *)0x41038000

8. Any error in below code? #include <stdio.h> int main () { char a [] = {'h','e','l','l', 'o'}; char * b = "Hello"; printf("%d %d", sizeof (a), sizeof(b)); strcat (a, "world"); strcat (b, "world"); }

9. Difference between Thread & Process? RTOS

10. What are the various IPC mechanisms available and which is the fastest?

11. what is the difference between Mutex, Semaphore, Binary semaphore?

12. Difference between blocking and non-blocking socket? What are the socket APIs used?

13. How to achieve multiplexing in sockets? Explain briefly

14. While designing a task how do you decide to go for event driven approach or polling? Can you give an example for each scenario?

15. How to fast Producer and slow consumer problem in flow control context in high speed ethernet connection?

16. Explain SOLID principles with an example for each?

17. Write a program to generate a hex-coded string of a given integer Ex: Input: 100 Output: 0x64

18. Remove all special characters from a given string buffer without using additional buffer Eg.: Input: “12?45*AB-” Output: “1245AB”

19. Reverse the bit sequence in the given integer Eg.: 10110110 (or) 0xB6 01101101 (or) 0x6B

20. Write a class for implements stack with push, pop, length, isempty, isfull methods