Home / ECE / Microprocessors :: Section 7

ECE :: Microprocessors

  1. In 8085 microprocessor with memory mapped I/O which of the following is true?

  2. A.
    I/O devices have 16 bit addresses
    B.
    I/O devices are accessed during IN and OUT instructions
    C.
    There can be a maximum of 256 input and 256 output devices
    D.
    Logic operations can not be performed

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Which of the following 8 bit microprocessors has maximum addressing modes?

  4. A.
    8085
    B.
    Z 80
    C.
    6800
    D.
    6809

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Java variables are called

  6. A.
    instance variables, class variables and global variables
    B.
    instance variables, class variables and local variables
    C.
    instance variables, class variables and sector variables
    D.
    global variables, class variables and local variables

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Consider the real expression in Pascal language

    ((X * Z) + Y/(M * P + K) + X)/Y + Y)

    What would be evaluated first

  8. A.
    XZ and MP + K
    B.
    XZ + Y and MP + K
    C.
    (MP + K + X) / Y
    D.
    Y / (MP + K)

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. 8 bit data can have 256 numbers ranging from 00000000 to 111 111 11.

  10. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Assertion (A): In C arithmetic operations are pemiissible on ints, floats and chars.

    Reason (R): In C every arithmetic operator must be written explicitly.

  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

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Which of the following is a valid expression in FORTRAN 77?

  14. A.
    B * - 3
    B.
    B * (- 3)
    C.
    B * * - 3
    D.
    B * + 2

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. In setting up 'for' loops in Pascal, the initial and final values of index may be

  16. A.
    integer constants
    B.
    Integer constants or integer variable names
    C.
    integer constants or integer variable names or integer expressions
    D.
    integer constants or real constants

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. In a 3 byte instruction of 8085, the first, second and third byte respectively indicate

  18. A.
    operation code, low order byte of data/address and high order byte of data / address
    B.
    low order byte of data / address, high order byte of data / address and operation code
    C.
    high order byte of data / address, low order byte of data / address and operation code
    D.
    high order byte of data / address, operation code and low order byte of data / address

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. In 8085 stack pointer is

  20. A.
    4 bit register
    B.
    8 bit register
    C.
    16 bit register
    D.
    32 bit register

    View Answer

    Workspace

    Discuss Discuss in Forum