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ECE :: Microprocessors

  1. ALU 1C 74181 can accept two words each having

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

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  3. Which of the following is not a legal subscript?

  4. A.
    J + 2
    B.
    JA - 4
    C.
    -3
    D.
    3* IA - 2

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  5. The instruction MOV M, r in 8085

  6. A.
    causes content of register r to be moved to memory location whose address is in register H, L and uses register indirect addressing mode
    B.
    causes the content of memory location whose address is in register H, L to move to register r and uses register indirect addressing mode
    C.
    causes the content of register r to be moved to memory location whose address is in register H, L and uses immediate addressing mode
    D.
    causes the content of memory location whose address is in register H, L to move to register r and uses immediate addressing mode

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  7. Which of the following characters is allowed in variable names in C?

  8. A.
    comma
    B.
    dot
    C.
    blank
    D.
    underscore

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  9. The standard FORTRAN exponential form of decimal number - 0.000000023 is

  10. A.
    2.3 E - 8
    B.
    -2.3 E - 8
    C.
    2.3 E - 7
    D.
    -2.3 E - 7

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  11. Consider the following program for 8085

    MOV A, D
    RAL
    MOV D, A

    If initial contents of register D is decimal number 20, the final content of register D is

  12. A.
    decimal 20
    B.
    decimal 40
    C.
    decimal 10
    D.
    none of the above

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  13. Assertion (A): In C a variable name can have upto 8 characters and special symbols can also be part of variable name.

    Reason (R): In C a type declaration at the beginning of program indicates the type of variable name used in the program.

  14. 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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  15. A string constant in basic is

  16. A.
    a string of capital alphabets A to Z, included in question mark
    B.
    a string of capital alphabets A to Z and digits 0 to 9 included in question mark
    C.
    a string of capital alphabets A to Z, digits 0 to 9 and special characters
    D.
    a string of capital alphabets A to Z, digits 0 to 9 and special characters included in question mark

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  17. Assertion (A): In 8085 when RESET OUT goes low processing begins.

    Reason (R): CPU remains reset till RESET IN signal goes high.

  18. 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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  19. In microprocessor 8088

  20. A.
    8 data bits are multiplexed with 8 least significant bits of address bus
    B.
    8 data bits are multiplexed with 8 most significant bits of address bus
    C.
    16 data bits are multiplexed with 16 bits of address bus
    D.
    none of the above

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