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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. Which of the following characteristic are necessary for a sequential circuit?

    1. It must have 6 gates
    2. It must have feedback
    3. Its output should depend on past value
    Which of the above statements are correct?

    2. A.
    1, 2, 3
    B.
    1, 2
    C.
    2, 3
    D.
    1, 3

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  2. 10112 x 1012 = __________ 10

    3. A.
    55
    B.
    45
    C.
    35
    D.
    25

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  3. For the logic circuit of the given figure the simplified Boolean equation

    4. A.
    Y = (A + B) (C + D) (E + F)
    B.
    Y = A = B + C + D + E + F
    C.
    ABCDEF
    D.
    ABC + DEF

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  4. A combination circuit is one in which the output depends on

    5. A.
    input combination at that time
    B.
    input combination and previous output
    C.
    input combination and previous input
    D.
    present output and previous output

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  5. 718 = __________ .

    6. A.
    1110002
    B.
    1110012
    C.
    1000012
    D.
    1100012

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  6. Boolean expression for the output of XNOR (Equivalent) logic gate with inputs A and B is

    7. A.
    AB + AB
    B.
    AB + AB
    C.
    (A + B). (A + B)
    D.
    (A + B). (A + B)

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  7. An SR flip flop can be built using NOR gates or NAND gates.

    8. A.
    True
    B.
    False

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  8. In the given figure RC = RL = 1 kΩ, then V0 =

    9. A.
    5 V
    B.
    2.5 V
    C.
    1 V
    D.
    0 V

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  9. A 14 pin NOT gate 1C has __________ NOT gates.

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

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  10. F's complement of (2BFD)hex is

    11. A.
    E 304
    B.
    D 403
    C.
    D 402
    D.
    C 403

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