IP Infusion Interview Question

IpInfusion Interview Question

IP-Infusion Interview Question
----------------------------------------

Instead of taking multiple rounds, As per my knowledge IP Infusion took only one round, and touch all of the area.
First they will start throwing question from the area in which you are comfortable,and then they will toggle in topics.
Allow me to share my friend experience and Interview process for exp person.
The below question may be depend upon panel to panel and as per technology.

1.a Introduce yourself.
    b. role in each project.
2. In which area you are more comfortable i.e layer 2 or layer 3.
3. Have you worked on any broadcom chipset.
4. pkt flow in broadcom.
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5. how l2 table maintain, what data structure used to maintain.
6. what is IPC, do you know the implementation of pipe,
7. what is basic difference between pipe and fifo.
8 what is difference between linklist and tree.
9. Do you know the RB tree, write program for it.
10.a.  Explain packet flow from host H1 to H2. port 1 and 2 are in port channel .
     b. you have to explain pkt structure at each step from H1 to H2.
     c. how pkt distribution take place.
     d.  what is marker, explain the state machine.
      e. Do you know the D-Lag.
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      f. what is difference in LAG and LACP.
      g. Dest mac in lacp pdu. is it broadcost address or system address. Ethernet type for LACP.
      h. Can we do both side mode as passive. if no then why, is so then why.
      

                  -----------------                         -----------------
                  |  Switch  A       | 1---(-)---------|   Switch  B      |
                  |____________| 2---(-)---------|____________|
                           |                                                   |
                       Host H1                                       Host H2

IP Infusion Interview

11.a.  ping host A to host B, explain pkt at each steps
     b. what is ARP, can we modify the arp entry.
     Ethernet type for ARP.

       Host A -------- Switch ------------ Host B

12. can you write program, implementing message que.
13. complexity of some sorting . which is best sorting as per you. can you write same.
14. why you join us.

15. How soon you can join us.

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Ciena Interview Questions

Ciena Interview Questions


Few week back my Friend had interview in Ciena.
Allow me to share his experience and Interview process for exp person.
Generally Ciena take three technical round and one HR round,The below question may be depend upon panel to panel and as per technology.



+++++++++++++
First Round
+++++++++++++

This Round covered mostly c, DS, OS, and some networking basic Question.

1. Introduce yourself.
2. what will be the output.
   char *p = "ciena"
   char ar[] = "ciena"
   strlen(p);
   strlen (ar);
   strlen (&ar);
  
3. write your own strlen() program.
4. How to find the nth node from last in single linklist.
5. Allocate the memory for 2 int*. and free it. Now i had question
... How free will know how many byte memory has to free.
6. what will be the output of the below line.
int x = 100;
printf("%d",!c);

7. what will be the size of the below structure. explain why size will be this only.
struct x
{
  int x;
  struct x *y;
  char z;
  char *x;
}

8. what is difference in the below
char *p = "ciena"
char ar[] = "ciena"

9. Is there any abnormality if no the what will be output.
Sizeof (NULL)
Strlen(NULL);

10. ping host A to host B, explain pkt at each steps

ping Host B
Host A -------- Switch ------------ Host B

11. what is ARP.
12. what is vlan, what is untag and tag pkt.
13. Explain the current project and your activities/role in it.
14. what is static keyword.difference in below pgm and memory allocation of it.

1. static int x;
main()
{
printf x
}

2.
fun()
{
static int x;
}

15. what is difference between process and thread, how communication happen between them. what is shared between them.
16. what is mutex.
17. what is semaphore, how it differ form mutex.
18. what is volatile keyword.

19. char *p = (char *) malloc(sizeof(char));
P++;
is there any abnormality in the above line.

20. can we create thread like, is there any difference in A and B
A)                          B)
thread                  process
   |                      |
thread                   thread
   |                      |
Thread                   thread

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+++++++++++++
Second Round
+++++++++++++

1. Introduce yourself.
2. write a program <in such a way which can be run without any warning or error > to find whether linklist is circular or not.
3. what is difference in sourceport and inport in ACL rule.
4. Packet flow in broadcom.
5. write a program to set any bit of number. also write program to check whether any particular bit is set or not.
6. How may slices in each CAP, and how many entry can be in each CAP.
7. What is vlan cross connect.
8. What we can in egress which we can't do in VCAP/ICAP.
9. Is it required to set the qset, without setting it can we not create group.
10. Crete a entry in Braodcom, with below qualifiers,
 Dest mac,
 inport,
 ethernet Type,
 source port,
11. How will you protract a Global variable.
12. write the prototype of function to create a thread.Why we pass NULL.
13. write program to protract the global variable.
14. How semaphore differ from mutex.
15. What is IPC, is shared memory is ipc, can u write the prgram, using shared memory.

+++++++++++++
Third Round
+++++++++++++

1. Introduce yourself.
2. Write a program to merge the two linklist in sorted manner.
3. what is socket, can you write a program.
4. what is pthread, mutex and semaphore. can you write program.
5. what is the IPC.
6. what mechanise used for related and unrelated process.
7. How can thread communicated.
8. Do you see any difference in the below.
char *p = "ciena"
char ar[] = "ciena"
9. write a program to find the loop in linklist.
10. why below structure take only 12 byte.
struct cc
{
int x;
char y;
struct cc *c;
}
11. What is pointer to constant and constant to pointer.
12. what is lacp.


+++++++++++++
Fourth Round
+++++++++++++

It was last round,And suppose that it will only formality, so I was not excepting any technicl question, but in this round he give me marker
and ask me to explain the below question on board.

1. Draw the flow digram for upstream and downsteam in your project.
2. memory layout in C.
3. what does volatile keyword do. write a program using it.
4. do you know malloc, what does malloc return, why void.
5. write a declaration of array of pointer, pointer to an array.
6. write a prototype of function having argument as array of pointer, returning pointer of int type.
7. Allocate memory for 2-D array.
8. Why you want to join us.
9. Do you know pragma,what is it, how may types of it.
10. Through out your carrier, do u face any issue personal/technical etc.if so how you come over it.

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Ciena Interview Process

++++++++++
HR Round
++++++++++

1. Introduce yourself.
2. Why you want to join ciena.
3. How is you carrier in your present company.
4. Do you feel anything, which need to be change/improve in your present company.
And there was many more question in this round, it may vary from person to person.

Kindly refer it, We hope it will help you to focus on the particular area.

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