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Computer Fundamentals :: Basic Computer Knowledge

  1.  Two devices are in network if

  2. A.

    a process is running on both devices

    B.

    a process in one device is able to exchange information with a process in another device

    C.

    PIDs of the processes running of different devices are same

    D.

    none of these

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  3.  When collection of various computers seems a single coherent system to its client, then it is called

  4. A.

    computer network

    B.

    distributed system

    C.

    both (A) and (B)

    D.

    none of these

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  5.  Wireless transmission can be done via

  6. A.

    radio waves

    B.

    microwaves

    C.

    infrared

    D.

    all of the above

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  7.  A single channel is shared by multiple signals by

  8. A.

    analog modulation

    B.

    digital modulation

    C.

    multiplexing

    D.

    none of these

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  9.  The physical layer translates logical communication requests from the ______ into hardware specific operations.

  10. A.

    data link layer

    B.

    network layer

    C.

    trasnport layer

    D.

    application layer

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  11.  The physical layer is responsible for

  12. A.

    line coding

    B.

    channel coding

    C.

    modulation

    D.

    all of these

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  13.  In asynchronous serial communication the physical layer provides

  14. A.

    start and stop signalling

    B.

    flow control

    C.

    both (A) and (B)

    D.

    none of these

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  15.  The portion of physical layer that interfaces with the media access control sublayer is called

  16. A.

    physical signalling sublayer

    B.

    physical data sublayer

    C.

    physical address sublayer

    D.

    none of these

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  17.  Bits can be send over guided and unguided media as analog signal by

  18. A.

    digital modulation

    B.

    amplitude modulation

    C.

    frequency modulation

    D.

    phase modulation

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  19.  Which transmission media has the highest transmission speed in a network?

  20. A.

    coaxial cable

    B.

    twisted pair cable

    C.

    optical fiber

    D.

    electrical cable

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