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  1. Following information is given:

    1. x(z) has two poles at z = and z = - 1
    2. x(1) = 1, x(- 1) = 1
    3. ROC includes
    Then x(n) is:

  2. A.
    u(n) + (-1)n u(- n - 1)
    B.
    2 u(n) + (-1)n u(- n - 1)
    C.
    2 u(n - 1) + (-1)n - 1 u(- n)
    D.
    None

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  3. The feedback configuration and the pole-zero locations of G(s) are shown below. The root locus for negative values k, i.e., for -∞ < k < 0, has breakaway/break in points and angle of departure at pole P (with respect to the positive real axis) equal to

  4. A.
    ± 2 and 0°
    B.
    ± 2 and 45°
    C.
    ± 3 and 0°
    D.
    ± 3 and 45°

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  5. Consider the following, logic diagram :

    The count sequence of the above logic diagram is :

  6. A.
    0000 to 1111
    B.
    0000 to 1001
    C.
    0000 to 1010
    D.
    1001 to 0000

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  7. Which of the following has a major role in implementation of functions calls in C?

  8. A.
    Processor's registers
    B.
    Data segment
    C.
    The heap
    D.
    System stack

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  9. Effective Q of the equivalent electrical circuit of quartz crystal is of the order of

  10. A.
    200
    B.
    2000
    C.
    20000
    D.
    200000

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  11. Two linearly polarized plane waves A and B travelling in free space in the positive x direction meet at a point. Wave A is polarized in the y direction and the wave B is polarized in the z direction. If the two waves are of equal amplitude and are in phase quadrature, the resultant wave will be

  12. A.
    circularly polarized
    B.
    elliptically polarized
    C.
    linearly polarized
    D.
    vertically polarized

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  13. Consider the following statements regarding an antenna:

    1. It is a transducer
    2. Its performance is essentially frequency sensitive
    3. It is a reciprocal device
    4. With increase in its effective aperture area, width of the radiated beam increases.
    Which of the above statements are correct?

  14. A.
    1, 2 and 3
    B.
    1, 2 and 4
    C.
    2 and 3 only
    D.
    1 and 4 only

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  15. The range of memory location in given memory interfacing scheme is

  16. A.
    0000H - 07FFH
    B.
    F800H - FFFFH
    C.
    0000H - 03FFH
    D.
    0000H - 3FFFH

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  17. What was the first commercial geostationary communication satellite?

  18. A.
    INTELSAT 1
    B.
    ECHO
    C.
    INSAT-1A
    D.
    SPUTNIK

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  19. Assertion (A): When all inputs of a NAND-gate are shorted to get a one input, one output gate, it becomes an inverter.

    Reason (R): When all inputs of a NAND-gate are at logic 'O' level, the output is at logic 'I' level.

  20. A.
    Both A and R are individually true and R is the correct explanation of A
    B.
    Both A and R are individually true but R is not the correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

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