Advanced Microprocessors

Advanced Microprocessors

Easy Questions

Microprocessor

8085 Microprocessors
Advanced Microprocessors
  1. Given Boolean theorem AB + A′C + BC = AB + A′C which of the following is true?








  1. View Hint View Answer Discuss in Forum

    For the given Boolean theorem
    AB + A′C + BC = AB + A′C
    Apply dual property, we get:
    (A + B) (A′ + C) (B + C) = (A + B) (A′ + C)
    Hence alternative (A) is the correct answer.

    Correct Option: A

    For the given Boolean theorem
    AB + A′C + BC = AB + A′C
    Apply dual property, we get:
    (A + B) (A′ + C) (B + C) = (A + B) (A′ + C)
    Hence alternative (A) is the correct answer.

  1. (A′ + B′ + C′)′ is equal to—








  1. View Hint View Answer Discuss in Forum

    = (A′ + B′ + C′)′
    = A′′. B′′. C′′
    = ABC
    Hence (B) is the correct alternative.

    Correct Option: B

    = (A′ + B′ + C′)′
    = A′′. B′′. C′′
    = ABC
    Hence (B) is the correct alternative.

  1. Which of the following indentities is true?








  1. View Hint View Answer Discuss in Forum

    Apply hit and trial method
    (A) A + AC + AB + BC = A + BC: i.e., False
    (B) AC + AB + BC: i.e., False
    (C) AC + AB + BC = AC + AB = BC + AA = A (A + B) + C (A + B) = (A + C) (A + B)
    which is ≠ LHS i.e., False
    (D) A + AC + AB + BC
    = A (1 + C) + AB + BC
    = A + BC
    = L.H.S. True
    Hence alternative (D) is the correct answer.

    Correct Option: D

    Apply hit and trial method
    (A) A + AC + AB + BC = A + BC: i.e., False
    (B) AC + AB + BC: i.e., False
    (C) AC + AB + BC = AC + AB = BC + AA = A (A + B) + C (A + B) = (A + C) (A + B)
    which is ≠ LHS i.e., False
    (D) A + AC + AB + BC
    = A (1 + C) + AB + BC
    = A + BC
    = L.H.S. True
    Hence alternative (D) is the correct answer.

  1. A microprocessor with a 16 bit address bus is used in a linear memory selection configuration (i.e., Address bus lines are directly used as chip select of memory chips) with 4 memory chips. The minimum addressable memory space is—








  1. View Hint View Answer Discuss in Forum

    Each bit require one line so that for n lines, the size of memory in the address bus is 2n
    for 16 bit, 216 = 65, 536 or 64 K.

    Correct Option: A

    Each bit require one line so that for n lines, the size of memory in the address bus is 2n
    for 16 bit, 216 = 65, 536 or 64 K.

  1. In a dual slope ADC, to eliminate 50 Hz pick up, the minimum period of integration of the input signal is adjusted to be …… ms.








  1. View Hint View Answer Discuss in Forum

    The gate period is made equal to main supply period, 1/50 = 0·02 s or 20 ms. for 60 Hz, it is 16·67 ms.

    Correct Option: B

    The gate period is made equal to main supply period, 1/50 = 0·02 s or 20 ms. for 60 Hz, it is 16·67 ms.