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ECE :: Digital Electronics

  1. A Read/Write memory chip has a capacity of 64 k bytes. Assuming separate data and address line and availability of chip enable signal, what is the minimum number of pins required in the IC chip?

  2. A.
    28
    B.
    26
    C.
    24
    D.
    22

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  3. SSI refers to ICs with

  4. A.
    less than 12 gates on the same chip
    B.
    less than 8 gates on the same chip
    C.
    less than 6 gates on the same chip
    D.
    less than 3 gates on the same chip

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  5. In 8085, TRAP is

  6. A.
    always maskable
    B.
    cannot interrupt a service subroutine
    C.
    used for catastrophic events like temporary power failure
    D.
    lowest priority interrupt

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  7. The simplest register is

  8. A.
    buffer register
    B.
    shift register
    C.
    controlled buffer register
    D.
    bidirectional register

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  9. The logic realized by the circuit shown in figure

  10. A.
    F = A ⊙ C
    B.
    F = A ⊕ C
    C.
    F = B ⊙ C
    D.
    F = B ⊕ C

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  11. The hexadecimal number 5 F is equal to binary number

  12. A.
    1010011
    B.
    1011001
    C.
    1010101
    D.
    1011111

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  13. Which of the following methods is used for solving differential equations numerically?

  14. A.
    Runge-Kutta method
    B.
    Gauss-elimination method
    C.
    Newton-Raphson method
    D.
    Any one of these

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  15. Some ADCs are

    1. Parallel
    2. Updown
    3. Single slope
    4. Dual slope
    5. Successive approximation
    6. Stair step
    Out of above which ones do not use DAC?

  16. A.
    1 only
    B.
    1, 3, 4
    C.
    1, 2, 3
    D.
    1, 5, 6

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  17. As compared to TTL, ECL has

  18. A.
    lower power dissipation
    B.
    lower propagation delay
    C.
    higher propagation delay
    D.
    higher noise margin

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  19. A 16-megabit dynamic random access memory (DRAM) is an integrated circuit capable of storing __________ characters (bytes).

  20. A.
    1048567
    B.
    16 x 1024 x 106
    C.
    16 x 106
    D.
    2.1 x lo6

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