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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): A multiplexer can be used for data routing.

    Reason (R): A multiplexer has one input and many outputs.

    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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    3. A.
    A + B + C
    B.
    ABC
    C.
    ABC
    D.
    A + B + C

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  3. A 3 bit up-down counter can count from

    4. A.
    000 to 111
    B.
    111 to 000
    C.
    000 to 111 and also from 111 to 000
    D.
    none of the above

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  4. The density of dynamic RAM is

    5. A.
    the same as static RAM
    B.
    less than that of static RAM
    C.
    more than that of static RAM
    D.
    either equal or less than that of static RAM

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  5. The gates G1 and G2 in the figure have propagation delays of 10 n sec. and 20 n sec. respectively. If the input Vi makes an output change from logic 0 to 1 at time t = t0 then the output wavefrom V0 is

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  6. A 3 input NAND gate is to be used as inverter. Which of the following will give better results?

    7. A.
    The two unused inputs are left open
    B.
    The two unused inputs are connected to 0
    C.
    The two unused inputs are connected to 1
    D.
    None of the above

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  7. The maximum counting range of a four stage counter using IC 74193 is

    8. A.
    0 to 1023
    B.
    0 to 4093
    C.
    0 to 65535
    D.
    0 to 131071

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