Home / ECE / Digital Electronics :: Section 15

ECE :: Digital Electronics

  1. DeMorgan's second theorem is

  2. A.
    A . A = 0
    B.
    A = A
    C.
    A + B = A . B
    D.
    AB = A + B

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. In a D latch

  4. A.
    a high D sets the latch and low D resets it
    B.
    a low D sets the latch and high D resets it
    C.
    race can occur
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. In floating point representation, mantissa is expressed in

  6. A.
    excess 3 notation
    B.
    gray code
    C.
    excess 32 notation
    D.
    2's complement

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Which of the circuits in the given figure that converts JK flip flop to T flip flop?

  8. View Answer

    Workspace

    Discuss Discuss in Forum


  9. In the generic microprocessor

  10. A.
    instruction cycle time period is shorter than machine cycle time period
    B.
    machine cycle time period is shorter than instruction cycle time period
    C.
    instruction cycle time period is exactly half of machine cycle time period
    D.
    instruction cycle time period is exactly equal to machine cycle time period

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Consider the following registers:

    1. A accumulator and B register
    2. B and C registers
    3. D and E registers
    4. H and L registers
    Which of these 8-bit registers of 8085 μP can be paired together to make a 16-bit register?

  12. A.
    1, 3 and 4
    B.
    2, 3 and 4
    C.
    1 and 2
    D.
    1, 2 and 3

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Access time of a storage is the time required

  14. A.
    to write one word into the memory
    B.
    to read one word from the memory
    C.
    to write one word into and to read one word from the memory
    D.
    either to write one word or to read one word

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. For a D/A converter, inputs and outputs are given. The output corresponding to digital input 01000

  16. A.
    2.0 V
    B.
    2.5 V
    C.
    3.0 V
    D.
    4.0 V

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. By placing an inverter between both inputs of an S-R flip-flop, the resulting flip-flop becomes

  18. A.
    J-K flip-flop
    B.
    D-flip-flop
    C.
    T-flip-flop
    D.
    Master salve JK flip-flop

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Which of the following flip-flop do not have race problem?

  20. A.
    T flip-flop
    B.
    D flip-flop
    C.
    JK flip-flop
    D.
    Master-slave flip-flop

    View Answer

    Workspace

    Discuss Discuss in Forum