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ECE :: Digital Electronics

  1. In an R-S latch, to set the output to high

  2. 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

  3. The amplifier used in miller voltage sweep should have a gain of

  4. A.
    -∞
    B.
    +1
    C.
    +∞
    D.
    -1

  5. How many different binary numbers can be stored in a register consisting of six switches?

  6. A.
    16
    B.
    32
    C.
    64
    D.
    128

  7. In one of the codes for transfer of numbers the code for the succeeding number differs from that of the number only in the change of a single digit. The code is

  8. A.
    ASCII
    B.
    Excess 3 CODE
    C.
    Gray CODE
    D.
    none of these

  9. Assertion (A): TTL uses multiple emitter transistor.

    Reason (R): Multiple emitter transistors with about 60 emitters have been developed.

  10. 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

  11. "Micro-program" is

  12. A.
    the name of the source program in microcomputer
    B.
    the set of instructions indicating the primitive operations in 1 system
    C.
    the general name of 'MACRO's' in assembly language programming
    D.
    the name of programs of very small size

  13. The number of programmable 16 bit registers of 6800 are

  14. A.
    2
    B.
    3
    C.
    4
    D.
    5

  15. In 8085 microprocessor, if interrupt service requests have been received from all of the following interrupts, then which one will be serviced first?

  16. A.
    RST 5.5
    B.
    RST 6.5
    C.
    RST 7.5
    D.
    None

  17. In floating point representation, the number of bits of mantissa is

  18. A.
    10
    B.
    9
    C.
    8
    D.
    7

  19. The clock shown in figure has a frequency of 6 MHz. The frequency of the Q output will be

  20. A.
    12 MHz
    B.
    24 MHz
    C.
    3 MHz
    D.
    1.5 MHz