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ECE :: Microprocessors

  1. The timing difference between a slow memory and fast processor can be resolved if

  2. A.
    processor is capable of waiting
    B.
    external buffer is used
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

  3. In 8086 the number of bytes which can be addressed directly is about

  4. A.
    1000
    B.
    10000
    C.
    100000
    D.
    one million

  5. Consider the following statements about DRAM

    1. Page mode read operation is faster than RAS read
    2. RAS input remains active during column address strobe
    3. The row and column addresses are strobed into the internal buffers using RAS and CAS inputs respectively
    Which of the above statements are correct?

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

  7. In Fortran 77 a variable name can contain special characters.

  8. A.
    True
    B.
    False

  9. Consider the following statements

    1. EEPROM has the problem of high write time.
    2. EEPROM has the problem of limited number of write cycles.
    3. Shadow RAM has the problem of high write time.
    Which of the above statements are correct?

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

  11. Which of the following is not a general purpose peripheral?

  12. A.
    I/O port
    B.
    Programmable interrupt controller
    C.
    Programmable CRT controller
    D.
    Programmable interval timer

  13. Each instruction in assembly language program has the following fields:

    1. Lable field
    2. Mnemonic field
    3. Operand field
    4. Comment field
    The correct sequence of these fields is?

  14. A.
    1, 2, 3, 4
    B.
    1, 2, 4, 3
    C.
    2, 1, 3, 4
    D.
    2, 1, 4, 3

  15. In one's complement 8 bit representation 11111111 represents

  16. A.
    +0
    B.
    -0
    C.
    +1
    D.
    -1

  17. The operating modes of 8255 A are called

  18. A.
    mode 0 and mode 1
    B.
    mode 0, mode 1 and mode 2
    C.
    mode 0 and mode 2
    D.
    mode 0, mode 2 and mode 3

  19. Which of the following is type declaration statement in C?

  20. A.
    int bar
    B.
    s = s + 1
    C.
    king = horse + 1
    D.
    prin = prin * prin