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ECE :: Digital Electronics

Digital Electronics - Section 1
Digital Electronics - Section 2
Digital Electronics - Section 3
Digital Electronics - Section 4
Digital Electronics - Section 5
Digital Electronics - Section 6
Digital Electronics - Section 7
Digital Electronics - Section 8
Digital Electronics - Section 9
Digital Electronics - Section 10
Digital Electronics - Section 11
Digital Electronics - Section 12
Digital Electronics - Section 13
Digital Electronics - Section 14
Digital Electronics - Section 15
Digital Electronics - Section 16
Digital Electronics - Section 17
Digital Electronics - Section 18
Digital Electronics - Section 19
Digital Electronics - Section 20
Digital Electronics - Section 21
Digital Electronics - Section 22
Digital Electronics - Section 23
Digital Electronics - Section 24
Digital Electronics - section-25
Digital Electronics - Section-26

  1. A is even or B is true. Negation of above statement is

    2. A.
    A is odd or B is false
    B.
    A is odd and B is false
    C.
    A is even or B is false
    D.
    A is even and B is false

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  2. The abbreviation DTL stands for

    3. A.
    Digital Timing Logic
    B.
    Diode Transistor Logic
    C.
    Dynamic Transient Logic
    D.
    Delayed Tracking Logic

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  3. Which one of the following is a D to A conversion technique?

    4. A.
    Successive approximation
    B.
    Weighted resistor
    C.
    Dual slope
    D.
    Single slope

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  4. What is the purpose of using ALE signal high?

    5. A.
    To latch low order address from bus to separate A0 - A7 lines
    B.
    To latch data D0 - D7 from bus to separate data bus
    C.
    To disable data bus latch
    D.
    All of the above

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  5. To have the multiprocessing capabilities of the 8086 microprocessor, the pin connected to the ground is

    6. A.
    DEN
    B.
    ALE
    C.
    INTER
    D.

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  6. An index register in digital computer is a register to be used for

    7. A.
    performing arithmetic and logic operations
    B.
    temporary storage of result
    C.
    counting number of times a program is executed
    D.
    address modification purpose

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  7. Assuming accumulator contain A 64 and the carry is set (1). What will register A and carry (CY) contain after ORA A?

    8. A.
    A 6 H, 1
    B.
    A 6 H, 0
    C.
    00 H, 0
    D.
    00 H, 1

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  8. 2's complement of a given 3 or more bit number of non-zero magnitude is the same as the original number if all bits except

    9. A.
    MSB are zero
    B.
    LSB are zero
    C.
    MSB are 1
    D.
    LSB are 1

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  9. A half adder adds __________ bits and a full adder adds __________ bits.

    10. A.
    two, three
    B.
    three, four
    C.
    four, six
    D.
    two, four

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  10. When a binary adder is used as BCD adder, the sum is

    11. A.
    correct when it is < 9
    B.
    correct when it is > 9
    C.
    correct when it is < 16
    D.
    none of these

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