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ECE :: Microprocessors

  1. Assertion (A): A PROM is a user programmable ROM.

    Reason (R): After programming PROM behaves like ROM.

  2. 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

  3. The operator precedence in Java is in the order

  4. A.
    arithmetic operation, increment and decrement operation, comprassion, logical operation and assignment operation.
    B.
    increment and decrement operation, arithmetic operation, comparison, logical operation and assignment operation.
    C.
    comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation.
    D.
    arithmetic operation, comparison operation, increment and decrement operation, logical operation and assignment operation.

  5. A colour monitor usign 16 bits at a resolution of 600 x 400 pixels needs a memory of

  6. A.
    240000 B
    B.
    9600 B
    C.
    6400 B
    D.
    480000 B

  7. Read the following statements as regards register pairs in microprocessor 8085

    1. B represents B, C pair with B as high order register and C as low order register.
    2. D represents D, E pair with D as high order register and E as low order register.
    3. H represents H, L pair with H as high order register and L as low order register.
    Which of the above statements are correct?

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

  9. The 8085 instruction 'PUSH PSW' belongs to the group

  10. A.
    data transfer
    B.
    arithmetic
    C.
    logic
    D.
    none of the above

  11. Assertion (A): In C it is possible for functions to call themselves.

    Reason (R): C makes use of 'Pointers'.

  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. In IC 74181 a sum greater than 15 leads to low carry out.

  14. A.
    True
    B.
    False

  15. Assertion (A): In 8085, the zero flag is set when ALU operation results in 0. If the result is not 0, this flag is reset.

    Reason (R): In 8085 the S flag is set when the contents of accumulator become negative during execution of an instruction.

  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 operations which occur most frequently in a computer are

  18. A.
    fetch
    B.
    execute
    C.
    both (a) and (b)
    D.
    none of the above

  19. The addressing mode depicted in the given figure is

  20. A.
    direct
    B.
    register
    C.
    register indirect
    D.
    immediate