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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. The gate width of a monostable multivibrator is given by

    2. A.
    T = 1.1 RC
    B.
    T = 0.693 RC
    C.
    0.963 RC
    D.
    T = 0.369 RC

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  2. Assertion (A): 2's complement arithmetic is preferred in digital computers

    Reason (R): The hardware required to obtain 2's complement is simple.

    3. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is true, R is false
    D.
    A is false, R is true

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  3. For the logic circuit of the given figure, Y =

    4. A.
    A + BC
    B.
    BC
    C.
    AB
    D.
    AB + C

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  4. For edge triggering in flip flops, manufacturers use

    5. A.
    RC circuit
    B.
    direct coupled design
    C.
    either RC circuit or direct coupled design
    D.
    none of the above

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  5. Assertion (A): A binary number is a string of zeros and ones only

    Reason (R): The base in a binary system is 2

    6. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is true, R is false
    D.
    A is false, R is true

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  6. What does the B register contain after the first MOV B, A has been executed?

    7. A.
    40 H
    B.
    60 H
    C.
    80 H
    D.
    80 D

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  7. Program counter in a digital computer

    8. A.
    counts the number of program run in the machine
    B.
    counts the number of times a subroutine is called
    C.
    counts the number of times the loops are executed
    D.
    points the memory address of the current or the next instruction to be executed

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  8. __________ switch, a T flip-flop is used as __________ switch, a T flip-flop is used as switch

    9. A.
    toggled, delay
    B.
    delay, toggle
    C.
    set reset
    D.
    reset, set

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  9. In a three variable K map four adjacent cells give

    10. A.
    single variable term
    B.
    two variable term
    C.
    three variable term
    D.
    either (a) or (b)

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  10. In 2 out of 5 code, decimal number 8 is

    11. A.
    11000
    B.
    10100
    C.
    11000
    D.
    1010

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