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ECE :: Microprocessors

Microprocessors - Section 1
Microprocessors - Section 2
Microprocessors - Section 3
Microprocessors - Section 4
Microprocessors - Section 5
Microprocessors - Section 6
Microprocessors - Section 7
Microprocessors - Section 8
Microprocessors - Section 9
Microprocessors - Section 10
Microprocessors - Section 11
Microprocessors - Section 12
Microprocessors - Section-13

  1. In 8085

    2. A.
    RST 6.5 and RST 5.5 are high level sensitive interrupts
    B.
    RST 6.5 and RST 5.5 are low level sensitive interrupts
    C.
    RST 5.5 is low level sensitive interrupt but RST 5.5 is high level-sensitive interrupt
    D.
    RST 5.5 is low level sensitive interrupt but RST 6.5 is high level sensitive interrupt

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  2. Assertion (A): Microprocessor 8085 has an 8 bit register called accumulator which stores intermediate answers during a computer operation.

    Reason (R): Accumulator can send or receive data.

    3. 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. Assertion (A): Interfacing means synchronisation of digital information transmission between input output devices and computer.

    Reason (R): A computer with higher bit word size executes programs at a faster rate.

    4. 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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  4. IC 74181 is a 4 bit device.

    5. A.
    True
    B.
    False

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  5. Which of the following instructions in 8085 does not belong to data transfer group?

    6. A.
    L X I rp, data 16
    B.
    MOV M, r
    C.
    MVIM, data
    D.
    ADC M

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  6. Which of the following buses does not exist in 8085?

    7. A.
    Data bus
    B.
    Address bus
    C.
    Control bus
    D.
    Exchange bus

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  7. The sign of a floating point number depends on

    8. A.
    only the sign of mantissa
    B.
    only the sign of exponent
    C.
    the sign of both mantissa and exponent
    D.
    either (a) or (b)

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  8. Assertion (A): A higher level language is less efficient that machine language but more efficient than assembly language.

    Reason (R): It is easier to learn and use higher level language than machine language.

    9. 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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  9. The accumulator drives the ALU.

    10. A.
    True
    B.
    False

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  10. System bus is the communication channel between microprocessor and peripherals.

    11. A.
    True
    B.
    False

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