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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

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  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

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  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

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  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

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  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

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  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

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  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

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

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

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  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

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  19. The symbol ! in Java means

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

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