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ECE :: Microprocessors

  1. Assertion (A): In 8085 WR and RD signals are active high.

    Reason (R): LOW WR means write operation and low RD means read operation.

  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. Which of the following is not treated as hexadecimal constant by assembler in 8085?

  4. A.
    64 H
    B.
    5 AFH
    C.
    AFH
    D.
    OCFH

  5. Which of the following real expressions is correct in Pascal?

  6. A.
    - Z + P * X
    B.
    (X + Y) (A + B)
    C.
    Z ** M
    D.
    Z P * M

  7. Each cell of static RAM contains

  8. A.
    4 MOS transistors
    B.
    4 MOS transistors and 1 capacitor
    C.
    2 MOS transistors
    D.
    4 MOS transistors and 2 capacitors

  9. Which group of instructions is used to change sequence of operations in a computer program?

  10. A.
    Data transfer group
    B.
    Branch group
    C.
    Arithmetic group
    D.
    Logic group

  11. In 8085, which instructions are useful for writing and using subroutines?

  12. A.
    CALL
    B.
    RET
    C.
    CALL and RET
    D.
    none of the above

  13. In a RAM chip with a total of 8096 words, the word addresses range from

  14. A.
    1 to 8096
    B.
    0 to 8095
    C.
    1 to 8095
    D.
    0 to 8096

  15. The loops ' for , 'while' , 'do-while' are used in

  16. A.
    Fortran 77
    B.
    Pascal
    C.
    C
    D.
    none of the above

  17. Which of the following is not a valid arithmetic statement in C?

  18. A.
    x = x + 1
    B.
    x = y * z
    C.
    x * y = z
    D.
    z = y / x

  19. The symbol ! in Java means

  20. A.
    logical NOT
    B.
    logical OR
    C.
    AND
    D.
    logical XOR