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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. In a digital counter the number of flip-flops is

    2. A.
    always 2
    B.
    always even
    C.
    always odd
    D.
    equal to the number of bits required in the final binary count

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  2. Assertion (A): Gray code is used in shaft position encoding.

    Reason (R): In gray code only a single bit change occurs when going from one code to another.

    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 K map of the given figure the simplified Boolean expression is

    4. A.
    ACD + ABD + BCD
    B.
    ACD + BCD
    C.
    ACD + ABD
    D.
    none of the above

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  4. The term VLSI generally refers to a digital IC having

    5. A.
    more than 1000 gates
    B.
    more than 100 gates
    C.
    more than 1000 but less than 9999 gates
    D.
    more than 100 but less than 999 gates

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  5. 11012 - 10012 =

    6. A.
    1000
    B.
    0100
    C.
    0010
    D.
    0001

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  6. Which of the following memories normally has highest storage capacity?

    7. A.
    Magnetic disc
    B.
    Magnetic tape
    C.
    Semiconductor memory
    D.
    Core memory

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  7. The number of comparators of needed in a parallel conversion type 8 bit A to D converter is

    8. A.
    8
    B.
    16
    C.
    255
    D.
    256

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  8. Assertion (A): In hybrid digital circuits the problem of logic race can occur.

    Reason (R): In two level logic there is no problem of logic race.

    9. 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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  9. What is the memory word size of 8085 μp?

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

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  10. The characteristic equation of an SR flip-flop in given by

    11. A.
    Qn+1 = S + RQn
    B.
    Qn+1 = RQn + SQn
    C.
    Qn+1 = S + RQn
    D.
    Qn+1 = S + RQn

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