Home / ECE / Digital Electronics :: Section 8

ECE :: Digital Electronics

  1. A ripple counter has propagation delay.

  2. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Adder is a combinational logic circuit.

  4. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. In a decimal digital computer, the number 127 is stored

  6. A.
    1111111
    B.
    0001 00100111
    C.
    10001
    D.
    11000111

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. In 8085 microprocessor, which of the following interrupts has the lowest priority?

  8. A.
    RST 5.5
    B.
    RST 7.5
    C.
    TRAP
    D.
    INTR

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. All digital circuits can be realised using only

  10. A.
    EX-OR gates
    B.
    Multiplexers
    C.
    Half adders
    D.
    OR gates

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. The code used to reduce the error due to ambiguity in reading of a binary optical encoder is

  12. A.
    Octal code
    B.
    Excess-3 code
    C.
    gray code
    D.
    BCD code

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. In a clocked latch, clock drives

  14. A.
    R NAND gate
    B.
    S NAND gate
    C.
    both R and S NAND gates
    D.
    either R or S NAND gates

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Vectored interrupt is an interrupt that takes the program to a vector location. TRAP vectors to 0024 FI, RST 7.5 to 003 CH, RST 6.5 to 0034 H and

  16. A.
    RST 5.5
    B.
    RST 6.5
    C.
    24 H to 48 H
    D.
    RST 5.5 to 002 CH

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. ALU carries out

  18. A.
    arithmetic operations
    B.
    logic operations
    C.
    both arithmetic and logic operations
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. The SID data received is

  20. A.
    LSB first
    B.
    LSB last
    C.
    1
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum