Advanced Microprocessors

Advanced Microprocessors

Easy Questions

Microprocessor

8085 Microprocessors
Advanced Microprocessors
  1. The number of Boolean function that can be generated by n variables is equal to—








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    22n are the number of Boolean function that can be generated by variable. For example if n = 2 ⇒ 222 = 24 = 16 function.

    Correct Option: B

    22n are the number of Boolean function that can be generated by variable. For example if n = 2 ⇒ 222 = 24 = 16 function.

  1. The period of the output wave form for the circuit of figure shown, when triggered by a negative pulse is—








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    This circuit work as monostable multivibrator Time period = T= 1·1 RC (seconds)
    = 1·1 × 7·5 × 103 × 0·1 × 10–6 = 0·825 ms

    Correct Option: B

    This circuit work as monostable multivibrator Time period = T= 1·1 RC (seconds)
    = 1·1 × 7·5 × 103 × 0·1 × 10–6 = 0·825 ms

  1. The combinational logic circuit shown in given figure has an output Q which is—








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    Output of MUX, Q = A BC + AB + AB + AB
    Multiply by (C + C) the term which contain no C term:
    ∴     C + C=1
    Q = A BC + AB (C + C) + AB (C + C) + ABC (C + C)
    or  Q = A BC + ABC + ABC + ABC + AB C + ABC + AB C
    This can be simplified by K-map, from K-map
    Q = A + B + C

    Hence alternative (B) is the correct answer.

    Alternative Method:

    Output of Mux, Q = A BC + AB + AB + AB
    or
    Q = A (BC + B) + A (B+ B)
    or
    Q = A (B + C) + A {∵ BC + B = B + C}
    or
    Q = AB + AC + A {∵B + B = 1}
    or
    Q = AB + A +AC {∵ AB + A = A + B}
    or
    Q = A + B + AC
    or
    Q = AC + A + B
    or
    Q = A + C + B {∵ AC + A = A + C}
    or
    Q = A + B + C

    Correct Option: B

    Output of MUX, Q = A BC + AB + AB + AB
    Multiply by (C + C) the term which contain no C term:
    ∴     C + C=1
    Q = A BC + AB (C + C) + AB (C + C) + ABC (C + C)
    or  Q = A BC + ABC + ABC + ABC + AB C + ABC + AB C
    This can be simplified by K-map, from K-map
    Q = A + B + C

    Hence alternative (B) is the correct answer.

    Alternative Method:

    Output of Mux, Q = A BC + AB + AB + AB
    or
    Q = A (BC + B) + A (B+ B)
    or
    Q = A (B + C) + A {∵ BC + B = B + C}
    or
    Q = AB + AC + A {∵B + B = 1}
    or
    Q = AB + A +AC {∵ AB + A = A + B}
    or
    Q = A + B + AC
    or
    Q = AC + A + B
    or
    Q = A + C + B {∵ AC + A = A + C}
    or
    Q = A + B + C

  1. To realise the given truth table from the circuit shown in figure, the input to J in terms of A and B would be—








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    From truth table if we form K map, we get

    J = AB + AB = B (A + A) = B

    Correct Option: C

    From truth table if we form K map, we get

    J = AB + AB = B (A + A) = B

  1. An OR gate has 6 inputs. How many input words are there in its truth table?








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    Number of input = 6
    Number of words = 26 = 64
    Hence alternative (C) is the correct answer.

    Correct Option: C

    Number of input = 6
    Number of words = 26 = 64
    Hence alternative (C) is the correct answer.