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ECE :: Digital Electronics

  1. A flip flop is a

  2. A.
    combinational circuit
    B.
    memory element
    C.
    arithmetic element
    D.
    memory or arithmetic element

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  3. A 4 bit parallel type A/D converter uses a 6 volt reference. How many comparators are required and what is the resolution in volts?

  4. A.
    0.375 V
    B.
    15 V
    C.
    4.5 V
    D.
    10 V

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  5. Quantization error occurs in

  6. A.
    D/A converter
    B.
    A/D converter
    C.
    both D/A and A/D converter
    D.
    neither D/A nor A/D converter

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  7. Which of these are universal gates?

  8. A.
    Only NOR
    B.
    Only NAND
    C.
    Both NOR and NAND
    D.
    NOR, NAND, OR

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  9. Out of latch and flip flop, which has clock input?

  10. A.
    Latch only
    B.
    Flip flop only
    C.
    Both latch and flip flop
    D.
    None

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  11. A mod 4 counter will count

  12. A.
    from 0 to 4
    B.
    from 0 to 3
    C.
    from any number n to n + 4
    D.
    none of the above

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  13. In the given figure shows a 4 bit serial in parallel out right shift register. The initial contents as shown are 0110. After 3 clock pulses the contents will be

  14. A.
    0000
    B.
    0101
    C.
    1010
    D.
    1111

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  15. Which of the following finds application in pocket calculators?

  16. A.
    TTL
    B.
    CMOS
    C.
    ECL
    D.
    Both (a) and (c)

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