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ECE :: Microprocessors

  1. In a microprocessor the clock signal

  2. A.
    is always generated internally
    B.
    is always supplied externally
    C.
    may be generated internally or supplied externally
    D.
    is mostly supplied externally

  3. Which of the following identifiers is invalid in Pascal?

  4. A.
    BETA
    B.
    MAX 40
    C.
    2ND
    D.
    A MAX

  5. Computers 'Basic input output system' is generally stored in RAM chips.

  6. A.
    True
    B.
    False

  7. In 8085

  8. A.
    the upper 8 address bits appear on address bus and lower 8 bits on address data bus
    B.
    the lower 8 address bits appear on address bus and the upper 8 address bits appear on address data bus
    C.
    either upper or lower 8 address bits may appear at address bus
    D.
    either upper or lower 8 address bits may appear at address data bus

  9. If x = 0.1396 radians, the values of 1 - cos x and 2 sin2 (x / 2) using floating point arithmetic with a 4 digit mantissa are respectively

  10. A.
    .1000 E - 1 each
    B.
    .9727 E - 2 each
    C.
    .1000 E - 1 and .9727 E - 2 respectively
    D.
    .9727 E - 2 and .1000 E - 1 respectively

  11. The number of select lines in ALU 1C 74181 is

  12. A.
    2
    B.
    4
    C.
    8
    D.
    16

  13. In a computer MPU is the centre of all operations and control.

  14. A.
    True
    B.
    False

  15. Assertion (A): A RAM with access time of the order of hundreds of nano seconds is suitable for a control memory.

    Reason (R): The time taken to execute an operation in a microcomputer is critically de pendent on access time of control memory.

  16. 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 correct R is wrong
    D.
    A is wrong R is correct

  17. The statement ! (b < 5) in C means

  18. A.
    b = 5
    B.
    b > 5
    C.
    b > = 5
    D.
    none of the above

  19. Which data transfer scheme is used when large block of data is to be transferred in a computer?

  20. A.
    DMA
    B.
    Programmed data transfer
    C.
    Either (a) or (b)
    D.
    Neither (a) nor (b)