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ECE :: Digital Electronics

  1. In a sequential circuit the output at any instant depends on

  2. A.
    present inputs only
    B.
    past inputs only
    C.
    past outputs only
    D.
    past output and present input

  3. Point out the wrong statement, Sequential logic circuit is

  4. A.
    one that requires a clock to change states
    B.
    one in which past affects the present states
    C.
    one whose outputs changes immediately when the inputs change
    D.
    also called clock logic or synchronous logic

  5. In 8085 microprocessor, what is the memory address stored on the stack, when the program is interrupted?

  6. A.
    0210 H
    B.
    0.211 H
    C.
    0118 H
    D.
    020 FH

  7. The decimal equivalent of ABC16 is

  8. A.
    348
    B.
    2583
    C.
    2748
    D.
    33

  9. In parallel in-parallel out shift register all bits are loaded and read simultaneously.

  10. A.
    True
    B.
    False

  11. One XOR gate can work as

  12. A.
    one bit magnitude comparator
    B.
    two bit magnitude comparator
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

  13. A Charge Couple Device (CCD) is a

  14. A.
    RAM
    B.
    sequential accessed memory
    C.
    content addressable memory
    D.
    read only memory

  15. In an R-S latch, race condition occurs when

  16. A.
    R is low and S is high
    B.
    R and S are high
    C.
    R and S are low
    D.
    R is high and S is low