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ECE :: Microprocessors

  1. Consider the following ON GO TO statement in Basic

    45 ON C GO TO 10, 20, 30

    If the values of C are 1, 2, 3, 2.6 the control will be transferred to statement number

  2. A.
    10, 20, 30, 20 respectively
    B.
    10, 20, 20, 30 respectively
    C.
    20, 30, 20, 10 respectively
    D.
    10, 30, 20, 20 respectively

  3. Consider the following about 'return' statement in C

    1. On executing the return statement, it immediately transfers the control back to the calling program.
    2. There is no restriction on the number of 'return' statements present in a function.
    3. The 'return' statement must be present at the end of called function.
    Which of the above are correct?

  4. A.
    All
    B.
    1 and 2 only
    C.
    1 and 3 only
    D.
    2 and 3 only

  5. For an accurate clock period in 8085 it is preferable to use

  6. A.
    Crystal
    B.
    Crystal or LC resonant circuit
    C.
    Crystal or RC circuit
    D.
    LC or RC circuit

  7. The memory hierarchy in microprocessor based system is

  8. A.
    register, cache, primary, mass, off line back up
    B.
    cache, register, primary, mass, off line back up
    C.
    cache, register, mass, primary, off line back up
    D.
    register, cache, mass, primary, off line back up

  9. When a peripheral device is not ready for data transfer it will send to the microprocessor a

  10. A.
    low READY bit
    B.
    high READY bit
    C.
    low or high READY bit depending on whether input or output is activated
    D.
    none of the above

  11. Assertion (A): In microprocessor 8085 DMA allows direct access to memory to speed up data transfer.

    Reason (R): HOLD and HLDA signals are used for DMA operations.

  12. 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

  13. Which of the following is not a valid variable in FORTRAN 77?

  14. A.
    BRG
    B.
    VS
    C.
    VS 3A
    D.
    3 VSA

  15. The expression A ** B / C + D is equivalent to

  16. A.
    AB / C + D
    B.
    AB / C + D
    C.
    AB / (C + D)
    D.
    None of the above

  17. Consider the following symbols

    1. Letters A to Z and a to z
    2. Digits 0 to 9
    3. Logical operators and, or, not
    4. Parenthesis ( )
    Which of the above symbols are available in Pascal?

  18. A.
    1 and 2 only
    B.
    1, 2 and 3 only
    C.
    1, 2 and 4 only
    D.
    All

  19. Which of the following 8085 instructions does not belong to arithmetic group?

  20. A.
    SHLD addr
    B.
    SUI data
    C.
    ADCM
    D.
    INR r