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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. For the given truth table, the correct Boolean expression is

    2. A.
    XYZ + X YZ + X Y Z
    B.
    X Y Z + XYZ + X YZ
    C.
    X Y Z + XYZ + XY Z
    D.
    XYZ + XYZ + XY Z

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  2. The race condition in NOR SR latch occurs when

    3. A.
    S = R = 1
    B.
    S = 0, R = 1
    C.
    S = 0, R = 0
    D.
    S = 1, R = 0

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  3. Flag bits in arithmetic unit provide

    4. A.
    status type information
    B.
    repeatability
    C.
    facilities for rechecks
    D.
    all of the above

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  4. The generic microprocessor contains a zero and a carry flag. These are located on the
    The 8156 of a figure has RAM locations from 2000 H to 20 FFH.

    5. A.
    interrupt control
    B.
    status register
    C.
    either (a) or (b)
    D.
    none of the above

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  5. How many interrupts are there of 8085 μP?

    6. A.
    4
    B.
    5
    C.
    6
    D.
    8

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  6. Multiplexer can be used as logic function generator.

    7. A.
    True
    B.
    False

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  7. 74HCT00 series is

    8. A.
    NAND IC
    B.
    interface between TTL and CMOS
    C.
    inverting IC
    D.
    NOR IC

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  8. The output of a full adder is

    9. A.
    SUM
    B.
    CARRY
    C.
    SUM and CARRY
    D.
    none of the above

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  9. Number of cards read per minute by a card reader may be of the order of

    10. A.
    20
    B.
    1
    C.
    10000
    D.
    300

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  10. The open collector gates in the given figure are tied together. The output Y =

    11. A.
    A + B + C + D
    B.
    A + B + C + D
    C.
    (A + B) (C + D)
    D.
    AB + CD

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