Global Edge Software Skype Interview Question

Global Edge Software Skype Interview Question +++++++++++++++++++++++++++++++++++++++++++++

GES Skype Interview Question

Part-1
++++++

1. Tell me about yourself
2. Explain the current project in detail.Then there were question from each lines <how/why/what>
3. why we go for q-in-q. what is benifite of it.
4. How much vlan stacking possible.And in your current project, how it was used.
5. what is NAT/PNAT.
6. LACP related configuration, what mechanisim used to filter control pkt.


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7. what is multicast, how multicast mac address map to multicast ip.
8. Is there any difference in trunk and access port. if show than what is it.
9. Trunk port can be part of how much vlan. and what about access port.
10. What is mib. How to save the configuration, which will restore when system will started.
11. How LAG and LACP differ.
12. Do you know the format of IP header.
13. If I want to send 2500 bytes packet. is it possible to send this size pkt. if no then how this pkt will be sent to.
14. what is fragment bit in ip header.how device know, all fragmented pkt has been recived and start assembling.
15. What is MTU.
16. What is minimum and max size of IP header.

17. What is TTL in ip header. How it is used.
18. What is the important filed in arp header.
19. how packet get identified, i.e it is arp pkt, icmp pkt etc.
20. Do you know TCP.
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                         Part-2
                                                                     

1. Is there any error in the below program. if no then what will be the output of the below program.
main()
{
fun1();
fun2();
}

fun1()
{
static i = 5;
i--;
printf("\r\n%d\r\n",i);
}

fun2()
{
static i = 3;
i--;
printf("\r\n%d\r\n",i);
}

2. what if we have call in main like

main()
{
fun1();
fun2();
fun1();
fun2();
}



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3. what is typedef and typecast.
4. write a program to delete the node in single circular linklist. when address of any node is given.
5. what is difference between inline and macro.
6. what are the type of storage class.
7. explain the memory layout in c. and explain the scope of storage class in it.
8. what is dangling pointer.
9. how will u access the element of structure. if struct xx *y;
10. what is void pointer, size of it . where we can use it.
11. what is function pointer, use of it.
12. how can in include the below header file in both a.c and b.c.
a.h having int i = 10;
13. where we can use union. 




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Global Edge Software Telephonic Interview

Global Edge Software Telephonic Interview Question ++++++++++++++++++++++++++++++++++++++++++++++++++

Global Edge Software

1. Tell me about yourself, what are the protocols you know, and what are the project you have worked, briefly explain the latest project role/work.
2. what is LACP and how it work.
3. what type of control packet are there in LACP.How to identify it.
4. what is vlan, what is trunk and access port, what type of device we can connect to these port.
5. How to identify the tagged and untagged packet. 
6. what will happen if we receive untagged packet at tagged packet. what will happen when it will out from egress port. 
7. There is a scenario where two switch are connect to each other in LAG, and from each switch one host is connected, and ping form host A to Host B.Explain the packet formate and what are the filed will be update/lookup will be happen at each stage.
                                   |------{-}--------- |
Host-A----- Switch-1 |------{LAG}------- | Switch-2 ---------- Host-B
                                   |------{-}--------- |

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8. What is STP, How root is elected, what are the type of port Role.
9. How are you good in C Programming.
10. what are the storage classes in C. and their default value, storage in memory.
11. what is static keyword. explain where we can use and in what scenario it will not be use full.
12. can we have static variable in header file.
compilation steps in C. what type of file will be generated at each stage.
13. we use stdio.h, how compiler know from which path it has to include.
14. If I have array of 10 elements, having 1000100101, in one iteration is it possible to sort this array. if so, explain the logic.
15. if I have single linklist, then without reversing the linklist, can we print the element of linklist in reverse order.
16. If in the same linklist we have address of any node, how can we delete the node.
17. explain the system calls for tcp/udp socket communication for both (client and server) .
18. If I have the connect call in udp socket, what will happen. will it work or throw any error. 


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HCL (Chennai) Telephonic Interview

HCL Interview Question

HCL (Chennai) Telephonic Interview

1. Tell me about yourself.
2. explain each step of compilation in c.
3. what is difference in macro and inline function.
4. I have multiple line of code and I want to use some part of code for one project requirement and other part of code or other project requirement, how you can achieve it.
5. what type of variable declaration in c.
6. In C program what type of main() function will be, whether it is declaration or definition. what is prototype of main.
7. What is the use of extern variable.
8. what is null pointer, where we use it.
9.What is an Opaque pointer.
10. what is memory leak.
11. can you tell me simple program of stack corruption.
12. what is difference between structure and union.
13. what is structre padding.
14. what is difference in malloc & calloc.
15. what does router do. do u konw any routing protocol.what does it user for.
16. Having single linklist there are 5 nodes and if I have address of third node, then how can I delete it.

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17. How you can find the middle of linklist.
18. how can u find the 2/3 of linklist.
19. which sorting technice is best as per you, can you explaion it.
20. what are the field of pkt will be modified in the below topology, form host A to server.
  Host A --- router A ------- router B -------router C -------- server.
21. What is NAT.
22. what is ARP, does arp pkt have ip hadder.
23. what is difference between trunk and access port.
24. What is use of fork system call.
25. what is difference betwwen fork and vfork.
26. having process in kernal and it recived an sigkill, what will happen, what will happen if process have child process.
27. what is IPC, what is difference in pipe and fifo.
28. Do you have any question for me.

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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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Juniper Telephonic Interview Questions

Juniper Telephonic Interview Question

Juniper Interview Questions 

1. Cont t he number of 1s in an integer.
2. Difference between little-endian and bigindian .
3. If unit 32 *0 = 10, what’s the value of p after ++p.
4. What is a system call?
5. Tell the implementation of write() and strcpy().
6. What does keyword volatile in c do?
7. What is spin lock?
8. Difference between semaphore and mutex . how binary semaphore and mutex is differ ?
9. Difference between TCP and UDP.

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10. Function call for client and server .
11. Is listen () block.
12. Difference between SCK_STREAM and SCOK_DGRAM

13. What does the keep alive option in socket () do.
14. Can UDP use connect? What does it do?
15. Describe select, what is the disadvantage of select ().

16. What is MTU/MRU.
17. How traceroute works.
18. What does SOCK_SEQPCAKET do? 
 

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