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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. High speed counter

    2. A.
    ring counter
    B.
    ripple counter
    C.
    synchronous counter
    D.
    asynchronous counter

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  2. Registers and counters are similar in the sense that they both

    3. A.
    count pulses
    B.
    store binary information
    C.
    are made from an array of flip-flops and gates integrated on a single chip
    D.
    are shift registers

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  3. A 4 line to 16 line decoder has

    4. A.
    16 inputs and 4 outputs
    B.
    4 inputs and 16 outputs
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

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  4. Which one of the following is the correct sequence of the numbers represented in the series given below?

    5. A.
    2, 3, 4, 5, 6......
    B.
    2, 4, 6, 8, 10 .....
    C.
    2, 4, 6, 10, 12......
    D.
    2, 4, 6, 10, 16 .....

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  5. Consider the Boolean expression X = ABCD + ABCD + ABCD + ACBD The simplified form of X is

    6. A.
    C + D
    B.
    BC
    C.
    CD
    D.
    B

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  6. In floating point representation the number of bits in exponent is

    7. A.
    8
    B.
    7
    C.
    6
    D.
    5

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  7. In 8085 microprocessor, an active low signal INTA is not needed from up service which of the following interrupt request?

    8. A.
    TRAP
    B.
    INTR
    C.
    RST 7.5
    D.
    RST 5.5

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  8. Consider the following statements:

    1. In the 2's complement representation, negative numbers are stored in sign magnitude form.
    2. Taking 2's complement is equivalent to sign change.
    3. In a 4 bit complement representation of a binary number A.
    4. In the 2's complement representation the most significant bit (MSB) is zero for a positive number.
    Of these, the only true statements are

    9. A.
    (I) and (III)
    B.
    (I) and (IV)
    C.
    (II) and (III)
    D.
    (II) and (IV)

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  9. Without any addition circuitry, an 8:1 MUX can be used to obtain.

    10. A.
    some but not all Boolean functions of 3 variables
    B.
    all functions of 3 variables but none of 4 variables
    C.
    all functions of 3 variables and some but not all of 4 variables
    D.
    all functions of 4 variables

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  10. The internal structure of PL A is similar to

    11. A.
    RAM
    B.
    ROM
    C.
    both RAM and ROM
    D.
    neither RAM nor ROM

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