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ECE :: Digital Electronics

  1. To convert SR latch to D latch

  2. A.
    connect both S and R to D
    B.
    connect D to S directly and D to R through inverter
    C.
    connect D to R directly and D to S through inverter
    D.
    connect S to D and leave R open

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  3. If a RAM has 34 bits in its MAR and 16 bits its MAR, then its capacity will be

  4. A.
    32 GB
    B.
    16 GB
    C.
    32 MB
    D.
    16 MB

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  5. The output voltage of 5-bit D/A binary ladder that has a digital input of 11010 (Assuming 0 = 0 V and 1 = + 10 V) is

  6. A.
    3.4375 V
    B.
    6.0 V
    C.
    8.125 V
    D.
    8.6875 V

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  7. The inputs to a 4 channel MUX have the following bandwidths. Channel 1-50 Hz, channel 2-200 Hz. Channel 3-75 Hz. Channel 4-90 Hz. The theoretical minimum sampling rate of the MUX is

  8. A.
    200 Hz
    B.
    400 Hz
    C.
    415 Hz
    D.
    1600 Hz

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  9. SSI is used in flip flops.

  10. A.
    True
    B.
    False

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  11. Two numbers in excess-3 code are added and the result is less than 8. To get equivalent binary

  12. A.
    0011 is subtracted
    B.
    0011 is added
    C.
    0110 is subtracted
    D.
    0110 is added

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  13. Flow charts that contain decision symbol

  14. A.
    represent straight line programs
    B.
    do not represent straight line programs
    C.
    all of the above
    D.
    none of the above

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  15. The ASCII code is for information interchange by a binary code for

  16. A.
    alphabet only
    B.
    number only
    C.
    alpha-numeric and other common symbols
    D.
    none of these

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  17. Assertion (A): CMOS devices have very low power consumption

    Reason (R): CMOS devices have high noise margin.

  18. 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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  19. Which is known as flash converter?

  20. A.
    Weighted resistor D/A converter
    B.
    Parallel A/D converter
    C.
    Stair step A/D converter
    D.
    Up-down counter type A/D converter

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