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ECE :: Digital Electronics

Digital Electronics - Section 1
Digital Electronics - Section 2
Digital Electronics - Section 3
Digital Electronics - Section 4
Digital Electronics - Section 5
Digital Electronics - Section 6
Digital Electronics - Section 7
Digital Electronics - Section 8
Digital Electronics - Section 9
Digital Electronics - Section 10
Digital Electronics - Section 11
Digital Electronics - Section 12
Digital Electronics - Section 13
Digital Electronics - Section 14
Digital Electronics - Section 15
Digital Electronics - Section 16
Digital Electronics - Section 17
Digital Electronics - Section 18
Digital Electronics - Section 19
Digital Electronics - Section 20
Digital Electronics - Section 21
Digital Electronics - Section 22
Digital Electronics - Section 23
Digital Electronics - Section 24
Digital Electronics - section-25
Digital Electronics - Section-26

  1. TTL inverter has

    2. A.
    one input
    B.
    two inputs
    C.
    one or two inputs
    D.
    three inputs

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  2. 4 bit ripple counter and 4 bit synchronous counter are made using flip-flop having a propagation delay of 10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S respectively, then

    3. A.
    R = 10 ns, S = 40 ns
    B.
    R = 40 ns, S = 10 ns
    C.
    R = 10 ns, S = 30 ns
    D.
    R = 30 ns, S = 10 ns

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  3. The number of digits in hexadecimal system

    4. A.
    15
    B.
    16
    C.
    10
    D.
    8

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  4. Which of these is the most recent display device?

    5. A.
    LED
    B.
    LCD
    C.
    VF
    D.
    (a) and (c)

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  5. A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH

    6. A.
    A = B = C = 0
    B.
    A = B = C = 1
    C.
    A = B = 1 and C = 0
    D.
    A = C = 1 and B = 0

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  6. In 2's complement form, - 2 is

    7. A.
    1011
    B.
    1110
    C.
    1100
    D.
    1010

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  7. The Boolean function/implemented in the figure using two I/P multiplexers is

    8. A.
    ABC + ABC
    B.
    ABC + AB C
    C.
    ABC + ABC
    D.
    ABC + AB C

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