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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. NAND gates can be used to produce edge triggering.

    2. A.
    True
    B.
    False

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  2. The number of comparator circuits required to build a three-bit simultaneous A/D converter is

    3. A.
    7
    B.
    8
    C.
    15
    D.
    16

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  3. -8 is equal to signed binary number

    4. A.
    10001000
    B.
    00001000
    C.
    10000000
    D.
    11000000

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  4. Assume that only x and y logic inputs are available. What is the minimum number of 2-input NAND gates required to implement x ⊕ y?

    5. A.
    2
    B.
    3
    C.
    4
    D.
    5

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  5. The parity bit is

    6. A.
    always 1
    B.
    always 0
    C.
    1 or 0
    D.
    none of the above

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  6. In 2's complement representation, a certain negative number - N is 1011. The representation for + N is

    7. A.
    0100
    B.
    0101
    C.
    0110
    D.
    0011

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  7. In 8355, the ROM is organized as __________ words of 8 bits each.

    8. A.
    2000
    B.
    2048
    C.
    8355
    D.
    835

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  8. What binary number does second row represent?

    9. A.
    01111001
    B.
    01010101
    C.
    10101010
    D.
    11101010

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  9. In C-language f- = 9 is equivalent to

    10. A.
    f = -9
    B.
    f = f - 9
    C.
    f = 9 - 1
    D.
    -f = 9

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  10. Effective address is calculated by adding or subtracting displacement value to

    11. A.
    immediate address
    B.
    Relative address
    C.
    absolute address
    D.
    base address

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