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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. Assertion (A): The output of an 8 bit ADC is 80 H if input is 2.5 V

    Reason (R): ADC has an output range of 00 to FF H if input range is - 5 to + 5 V

    2. 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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  2. A parity detector can detect

    3. A.
    single error only
    B.
    single error or odd number of errors
    C.
    two errors
    D.
    single or two errors

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  3. Which of the- following display consumes least amount of power?

    4. A.
    LCD
    B.
    LED
    C.
    Fluorescent display
    D.
    All display consume same power

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  4. The converter whose conversion time is independent of number of bits is

    5. A.
    dual stope
    B.
    counter type
    C.
    parallel conversion
    D.
    successive approximation

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  5. Serial input data of 8085 can be loaded into bit-7 of the accumulator by

    6. A.
    executing a RIM instruction
    B.
    executing RSTI
    C.
    using TRAP
    D.
    none of the above

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  6. The logic operations of the two circuits given below are

    7. A.
    complementary
    B.
    identical
    C.
    entirely different
    D.
    none of these

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  7. Which of the following is incorrect?

    8. A.
    (111)2 + (10)2 = 9
    B.
    (111)2 + (2)10 = (9)16
    C.
    7 + 2 = (1001)2
    D.
    None of the above

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  8. A register is

    9. A.
    a group is memories
    B.
    a group of devices that store digital data
    C.
    a chip used in computers
    D.
    a pure silica piece used in digital systems

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  9. In 8085 microprocessor, when TRAP interrupt is triggered program control is transferred to location

    10. A.
    0020 H
    B.
    0024 H
    C.
    0028 H
    D.
    002 CH

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  10. In 8085 microprocessor, what is the length of SP (stack) pointer?

    11. A.
    6 bits
    B.
    8 bits
    C.
    12 bits
    D.
    16 bits

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