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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. A full adder adds

    2. A.
    2 bits
    B.
    3 bits
    C.
    4 bits
    D.
    any number of bits

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  2. For a Mod 64 parallel counter we need

    3. A.
    6 flip flops
    B.
    6 flip flops and 2 AND gates
    C.
    6 flip flops and 4 AND gates
    D.
    none of the above

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  3. If the inputs to a 2 input XOR gate are high then, the output is high.

    4. A.
    True
    B.
    False

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  4. The number of select lines in a 16 : 1 multiplexer are

    5. A.
    4
    B.
    3
    C.
    2
    D.
    1

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  5. 9's complement of 5610 is

    6. A.
    4310
    B.
    8410
    C.
    6510
    D.
    5310

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  6. Am equivalent 2's complement representation of the 2's complement number 1101 is

    7. A.
    110100
    B.
    001101
    C.
    110111
    D.
    111101

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  7. In a 7 segment display the segments a, c, d, f, g are lit. The decimal number displayed will be

    8. A.
    9
    B.
    5
    C.
    4
    D.
    2

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  8. The minimum number of comparators required to build an 8 bit flash ADC is

    9. A.
    8
    B.
    63
    C.
    255
    D.
    256

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  9. For a Mod-64 synchronous counter the number of flip flops and AND gates needed is

    10. A.
    6 and 4 respectively
    B.
    4 and 6 respectively
    C.
    7 and 5 respectively
    D.
    5 and 7 respectively

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  10. A 4 bit DAC gives an output of 4.5 V for input of 1001. If input is 0110, the output is

    11. A.
    1.5 V
    B.
    2.0 V
    C.
    3.0 V
    D.
    4.5 V

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