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Interview Questions and Answers :: NEC Technologies

Home > Experience Archives > NEC Technologies > Interview Question Set 2
First Round (F-2-F) Second Round (F-2-F)
    Question :: 1
    Tell me about yourself and about project you are recently working on.

    Answer:
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    Question :: 2
    How you will debug, When packets are not coming to the interface. What Approach you will follow.

    Answer:
    It can be verified based on packets ERROR CODE in BCM.
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    Question :: 3
    How L3/L2 processing happen inside the ASIC. Expalin each steps in details.

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    Question :: 4
    What are the stages packets can come across while pass through ASIC?

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    Question :: 5
    How filters can be added in BCM chipset? List down all the steps.

    Answer:
    create group,
    create Fp entry,
    fp priority set,
    qualifier set,
    values to the qualifier and
    install.
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    Question :: 6
    How multicast IP address can be informed to multicast L2 MAC.?

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    Question :: 7
    How switch understands the multicast packets?

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    Question :: 8
    How would you rate yourself in C?

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    Question :: 9
    What will be the output:
    int a=2;
    if (a=0)
    printf("a is non zero");
    elseif(a>0)
    printf("a is +ve");
    else
    printf("a is zero");

    Answer:

    It will give a compile time error due to first if condition.



    Given : if(a=0)



    It should be : if(a==0)

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    Question :: 10
    Write the program to find prime numbers.

    Answer:
    int n;
    int a=0;
    scanf("%d",&a);
    n=a;
    while (n>2)
    {
    if(n%2!=0)
    {
    n=n/2;
    if (n>=2)
    {
    printf("%d is prime number", a);
    break;
    }
    }
    else
    {
    printf("%d is not prime number", a);
    break;
    }

    }
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    Question :: 11
    Write the program to find the duplicate numbers and its count in an array.

    Answer:
    int a[]= {2,3,4,7,9,3,8,9,6,8,7,9};
    int i=0;
    int j=0;
    int flag=0;
    int n=12;
    static int incr;
    for (i=0;i {
    for(j=0;j {
    if (a[i]==a[j])
    {
    incr++;
    if (incr>=2)
    flag=1;
    }
    }
    if (flag)
    printf("\n %d is repeated %d times in this array", a[i],incr);
    flag=0;
    incr=0;

    }
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    Question :: 12
    Describe a situation when you were forced to work under pressure. How did you cope with the situation?

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    Question :: 13
    What is differnce between policing and shaping? Explain in detail.

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First Round (F-2-F) Second Round (F-2-F)
    Question :: 1
    Tell me about yourself and about latest project.

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    Question :: 2
    What is hierarchy scheduling and its use?

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    Question :: 3
    How many hierarchy supports in QoS scheduling in BCM?

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    Question :: 4
    How ToS/CoS value impact in L2/L3 layers?

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    Question :: 5
    How leaky bucket algorithm works?

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    Question :: 6
    How WRED works? Explain in detail. What are the advantage over RED.

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    Question :: 7
    What if CCM packets received at MIP and MEP in ECFM?

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    Question :: 8
    Write the program to find the sum of two numbers & positions in an array to a numbers.

    Answer:
    int a[]= {2,3,4,7,9,3,8,9,6,8,7,9};
    int i=0;
    int j=0;
    int n=12;
    int sum=12;
    for (i=0;i {
    for(j=++i;j {
    if ((a[i]+a[j]) == sum)
    {
    printf("\n %d + %d positions of sum %d", a[i], a[j], sum);
    continue;
    }
    }
    }
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    Question :: 9
    How multicast L2 packets are mapped to multicast IP group.

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    Question :: 10
    Write a progrm to find loop detect and remove from linked list.

    Answer:
    int detectLoop(struct node *head)
    {
    struct node *slow = list, *fast = head;

    while (slow && fast && fast->next )
    {
    slow = slow->next;
    fast = fast->next->next;
    if (slow == fast)
    {
    printf("\r\nLoop detected in linked list \r\n");
    removeloop(slow, head);
    }
    }
    return 0;
    }

    void removeLoop(struct node *loop_node, struct node *head)
    {
    struct node *ptr1;
    struct node *ptr2;

    ptr1 = head;
    while (1)
    {
    ptr2 = loop_node;
    while (ptr2->next != loop_node && ptr2->next != ptr1)
    {
    ptr2 = ptr2->next;

    if (ptr2->next == ptr1)
    break;

    ptr1 = ptr1->next;
    }
    }
    ptr2->next = NULL;
    }
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    Question :: 11
    Write a program to find machine is little endian or big endian

    Answer:
    int i=1;
    if ((*(char*)&i) == 1)
    printf("LE");
    else
    printf("BE");
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    Question :: 12
    Write a program to change the byte in integer as 0xABABABAB to 0xABABCDAB;

    Answer:
    unsigned int i=0xABABCDAB;
    int b=0;
    for(b=31;b>0;b--)
    {
    if (b<16 && b>7)
    i=(1< }
    printf("\n NEW i = %X \r\n", i);
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    Question :: 13
    How do you see yourself contributing to our company?

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    Question :: 14
    Describe a situation when you needed to meet a tight deadline. How did you ensure to meet it?

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    Question :: 15
    Do you have any questions for me?

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