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ECE :: Digital Electronics

  1. A full adder has two outputs SUM and CARRY.

  2. A.
    True
    B.
    False

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  3. For the circuit shown in the figure, what is the frequency of the output Q?

  4. A.
    Twice the input clock frequency
    B.
    Half the input clock frequency
    C.
    Same as input clock frequency
    D.
    Inverse of the propagation delay of the FF

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  5. Which two rows represent identical binary numbers?

  6. A.
    A second and fourth
    B.
    Fifth and eight
    C.
    Third and seventh
    D.
    Second and third

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  7. How many input-output ports can be accessed by direct method of 8085 μp?

  8. A.
    8
    B.
    256
    C.
    32 K
    D.
    64 K

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  9. The binary equivalent of 4096.90625 is

  10. A.
    1000000000000.11101
    B.
    10000000000001.10101
    C.
    1000000000001.10001
    D.
    1000000000000.10011

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  11. When two 16-input multiplexers drive a 2-input MUX, what is the result?

  12. A.
    2-input MUX
    B.
    4-input MUX
    C.
    16-input MUX
    D.
    32 input MUX

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  13. Two voltages are -5 V and -10 V. In positive logic

  14. A.
    -5 V is 1 and -10 V is 0
    B.
    -10 V is 1 and -5 V is 0
    C.
    -5 V is 1 in some circuits and 0 in others
    D.
    -10 V is 1 in some circuits and 0 in others

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  15. In floating point number 0110100000010101, the exponent is equal to __________ 10

  16. A.
    11
    B.
    -11
    C.
    10
    D.
    -10

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  17. figure shows three pulse train inputs to a 3-input OR gate. Assuming positive logic, the output pulse rate train in figure (b) would be

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  19. The advantage of using dual slope ADC in digital voltmeter is that

  20. A.
    its conversion time is small
    B.
    its accuracy is high
    C.
    its output is in BCD
    D.
    it does not require a comparator

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