Cavium Network Interview Questions

Cavium Network Interview Questions

Cavium Network Interview Questions
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1. What is offset of() macro will work?? will it consider padding ??...
2. Swap the Bit's from x location to y location..!!!
3. Write a function which takes arguments such as bitwise swap, word wise swap, bitwise swap and completes the same
4. How to determine the Big-endian and Little-Endian of machine??
5. Please describe regarding the structure padding and how the __attribute__((packed)) works to remove the structure padding
6. How do you determine the linked list got a circular loop within the list?
7. Reverse the linked list both Recursive and Iterative way.
8. What are the boot stages involved with the boot up of Linux. Why the MMU is initialized two times instead of single??
9. How will the primary boot loader detect the MMC card without any driver, exactly how it will know the format of the disc to read the MBR
10. Why there is a Two stage boot loader instead of simple Single Boot stage process
11. What is the High-Mem and how it is useful in Linux
12. Position Independent and Position Dependent code in Linux?? Do you mean that standard shared libraries can also be made position Independent Code while compiling??
13. Structure padding was also called as holes...!! Can you access them with your normal pointer??
14. What are differences in typedef and #define?
15. How the DMA coherency is achieved?? Will it need the CPU to come into picture to flush the data to disk??
16. How do you know that your DMA Engine is capable of the scatter-gather??? Can you implement if it not capable??
17. Debugging the pthreads with GDB how?? Can we pause/suspend/kill a thread??
18. What is the dynamic debugging in Linux kernel??? Do you know kgdb??

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Infinite Computer Solution Telephonic Interview Questions

Infinite Computer Solution Interview Question

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1. Can you tell me about yourself, what all are the project you have done.
2. Specific questions from projects. Specially covered the current project in details.
3. What is ARP, what role it plays?
4. Can you explain the packet flow <in/out> in Broadcom chipset <L2 pkt> in details, at what level what all are the thing of the pkt will be looked /updated?
5. What is LACP, what activity you have done in it at your project?
6. Do you know LACP state machine.
7. What are the differences in LAG and LACP? What is similarity in both? < Some more questions arise at same points.>
8. What all are the properties that port should have to add in port channel.
9. What is the need of spanning tree, can’t we achieve its properties by any other mechanism.
10. What is difference between STP and RSTP?  <some more question covering port roles/stage etc>
    |--Switch A ---- Switch B -------Switch C ----|
    |----------------------------loop-------------|
11. What is loop guard in STP?
12. Can you explain vlan packet format. What all are the field it contains? How may max vlan can be. Why can’t we have more than that?  If we want, can we achieve in any other way.
13. If pkt will be double tagged, its size will be increased, then how it will be handled in network,
14. What IPC you have used in you project.  Then question from that, how/why not this.
15. What is general difference in binary semaphore and mutex.
16. What is function pointer, what is used of it, have you used it in your any project.
17. Is there any way we can achieved the functionality of function pointer.
18. Do you know sizeof operator, is this macro or function.

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Sasken Interview Questions

Sasken Interview Questions

Sasken Interview Questions

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Technical round

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1. Can you tell us about yourself and briefly about the projects you have mention in resume?
2. What exactly was your role in current project?  There were some questions related to project.
3. What types of debugging tool you have used?
4. What is NAT, what are the fields in NAT table?
5. Do you know SNMP, what is it?
6. What are the types of IPC you have used?
7. Have you used shared memory in project?
8. What is semaphore, how binary semaphore is differ from mutex, is it same or what.
9. Have you used messaged queue in you project.
10. What are the differences in process and thread?
11. What is volatile keyword in c?
12. What all are the storage classes.
13. What are the differences between static and global variable.
14. There is one function, and in that functions we declare an array of size 1000, and recursively we calling it, what will be the impact in respect of memory. What will be the impact if we declare that array as static?
15. What malloc return.
16. What kind of memory allocation mechanism used in you project.
17. What is difference in malloc/calloc.
18. What is difference between array and linklist.
19. What type of linklist have you used in your project.
20. If u had the address of head in single linklist, how you can print the list element from tail to head in single traversing.
21. What is paging.
    HR Round
    ========
    
    

1. Briefly tell me about yourself.
2. Some question from resume. Verified the information shared in resume.
3. Do you face a scenario like where you feel that you are not having prior working experience for any assigned work?
4. What is your primary approach, when task assign to you and you didn’t have prior information?
5. What additional step you will take <as per you>, when you feel that your rating in organization degrade.
6. Through out your carrier, do u face any issue personal/technical etc.if so how you come over it.Through out your carrier, do u face any issue personal/technical etc.if so how you come over it.Through out your carrier, do u face any issue personal/technical etc.if so how you come over it.Through out your carrier, do u face any issue personal/technical etc.if so how you come over it.In your carrier, do you face any issue i.e personal / technical etc? If so than how you came over it.
7. What are your career aspirations?
8. Then some pkg/notice etc question.

Sasken's Client Interview question (NEC Technologies India Limited)

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1. Can you introduce you self, covering what all are the project you have done, and what was your contributions in it?

2. Can you give brief idea about LACP state machine?

3. We have scenario like, 3 ports are part of port-channel, and one port in that goes down, so how the underlying protocol come to know

4. Which link has gone down, and how the load balancing happen at remaining two link.

5. What are the types of pdu used in LACP.

6. Can you tell the header for PDU.

7. How marker and control pdu differentiate.

8. We have scenario like at one switch lacp is supported and at another switch it doesn't, so can we bundle the ports in port channel if so then how if not then why not.

9. What advantage and disadvantage we have in the scenario where we have created bridge instead of port-channel. (3 ports are its part). <we can or can’t>

10. What is bridge, can you tell us the functionality of it. (There were some more question related to LACP and bridge, currently I am not able to re-call it.)

11. What is STP and can u tell how it works.

12. What is intension of resolving the loop <in term of stp>, what impact will be if it will be.

13. What are the ports types in STP.

14. There is scenario, we attached one host <laptop> to switch,<stp is enable at switch>, what type of PDU will be transmitted once we connected the host to switch.

15. What all are the type of pdu in terms of STP.

16. at what interval pdu exchange between switches.

17. What is basic difference in STP and RSTP. Also what will be change in pdu of STP and RSTP.

18. What is PVSTP.

20. Can you name some IPC mechanism?

21. Suppose i have to communicate with one machine to another machine, can we use pipe for it, if not the why, if so then how.

22. Can you tell the procedure for creating the socket <client/server>?

23. What is purpose of using the bind? What are the argument we pass.

24. When TCP connection establish, at server side we define the port no X, and at client we define at port no Y, so will it work or.

25. What is pthread.  What kind of library you have used for pthread.

26. When we create the thread what all thing will shared.

27. What is difference in mutex and binary semaphore?

 

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