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HCL Technologies Technical Interview Questions Answers HCL Telephonic Interview Questions

Home > Experience Archives > HCL Technologies > Interview Question Set 6
Second Round (Telephonic)

    1 / 18

    Introduce yourself and current project activities.

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    2 / 18

    How to find the loop in Single linked list, and how to resolve it. Explain each steps.

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    3 / 18

    Which is efficient in respect to searching AVL tree or RED BLACK tree.

    Answer:
    RB-Trees are, as well as AVL trees, self-balancing. Both of them provide O(log n) lookup and insertion performance.
    In respect to searching AVL tree is efficient then Red-Black Tree because they are more rigidly balanced.. The path from the root to the deepest leaf in an AVL tree is at most ~1.44 lg(n+2), while in red black trees it's at most ~2 lg (n+1).
    But if your application required frequent insertions and deletions, then Red Black trees should be preferred over AVL tree.
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    4 / 18

    What is big endian and little endian, Why we use little endia/big endia, How to identify which machine is little or big endian,

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    5 / 18

    What is volatile keyword, can we use constant and volatile together.

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    6 / 18

    Suppose below data I have to send from Machine A to B, where machine A is (big-endian machine) and machine B (little endian) machine, and without converting to data, which element of structure will be corrupted at little endian machine.
    struct
    {
    unsigned int x;
    unsigned int y;
    char d;
    char p;
    unsigned int z;
    }

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    7 / 18

    Can we not optimize the volatile variable?

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    8 / 18

    Where the global static variable, global variable, local variable, local static variable and volatile variable will be stored.

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    9 / 18

    When we put volatile what does compiler understand.

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    10 / 18

    What mechanism you will use to debug memory leak issue.

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    11 / 18

    How Valgrind track for memory leak. Valgrind work at run time or compile time.

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    12 / 18

    Order of evaluation, assume in an expression you have ++ -- and (), what will be execution order.

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    13 / 18

    How does sizeof operator calculate the size of variable, can you create your own size of operator.

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    14 / 18

    How does ARP work, what work you have done?

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    15 / 18

    How does ping happen from HOST-A to HOST-B in below topology?

    topology

    A) When both host are in same subnet.
    B) When Host are in different subnet.
    C) What if replace both router to switch explain scenario (A) and (B).

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    16 / 18

    Do you know local mac-address/Global mac-address?

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    17 / 18

    What is VLAN and how does it work, why we need VLAN, if we had subnet.

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    18 / 18

    What is native vlan? What is vlan pkt format, explain in details.

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