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ECE :: Exam Questions Paper

  1. By what name is the equation Δ . J = 0 frequency known?

  2. A.
    Poisson's equation
    B.
    Laplace's equation
    C.
    Continuity equation for steady currents
    D.
    Displacement equation

  3. The multiplication of two n bit numbers gives a product of length less than or equal to

  4. A.
    n bits
    B.
    2n bits
    C.
    2n bits
    D.
    2n - 1 bits

  5. Consider the following statements:

    1. Internal sorting is used if the number of items to be sorted is very large.
    2. External sorting is used if the number of items to be sorted is vary large.
    3. External sorting needs auxiliary storage.
    4. Internal sorting needs auxiliary storage.
    Which of the above statements are correct?

  6. A.
    1 and 2
    B.
    2 and 3
    C.
    3 and 4
    D.
    2 and 4

  7. Unit doublet is the Laplace inverse of __________ .

  8. A.
    1/s
    B.
    s2
    C.
    s
    D.
    none of these

  9. The Wheatstone bridge method of measuring resistance is ideally suited for the measurement of resistance values in the range of

  10. A.
    0.001 to 1 Ω
    B.
    0.1 to 100 Ω
    C.
    100 Ω to 10 kΩ
    D.
    100 kΩ to 10 MΩ

  11. With reference to C programming language, which of the following statements are correct?

    1. An identifier may start with an underscore.
    2. An identifier may end with an underscore.
    3. If is a valid identifier.
    4. The number of significant characters in and identifier is implementation dependent.
    Select the correct answer from the codes given below:

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

  13. A matched filter has a frequency response given:

    The impulse response h(t) of the filter is :

  14. A.
    [δ(t) - δ(t - T]
    B.
    [u(t) - u(t - T)]
    C.
    [S gn(t) - Sgn(t - t)]
    D.
    [S gn(t) + Sgn(t - T)]

  15. Given a unity feedback system with open-loop transfer function, The root locus plot of the system is of the form :


  16. If there is phase error in the carrier signal for the detection of SSB signals, then

  17. A.
    the output gets reduced, but a phase distortion results
    B.
    the output is not reduced, but a phase distortion results
    C.
    the output is not reduced, and also no distortion
    D.
    the output is reduced, no phase distortion

  18. How many and which types of machine cycles are needed to execute PUSH PSW by 8085 microprocessor?

  19. A.
    2, Fetch and memory write
    B.
    3, Fetch and memory write
    C.
    3, Fetch and memory read
    D.
    3, Fetch and memory read and memory write