Q. Assertion (A): TTL is a very popular logic in SSI and MSI category.

Reason (R): In Schottky TTL the power dissipation is less than in ordinary TTL.

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Q. FF₁₆ when converted to 8421BCD =

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Q. ECL has high switching speed because the transistors are

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Q. Karnaugh map can not be drawn when the number of variables is more than 4

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Q. A dynamic RAM cell which holds 5 V has to be refreshed every 20 ms so that the stored voltage does not fall by more than 0.5 V. If the cell has a constant discharge current of 0.1 pA, the storage capacitance of cell is

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Q. If memory chip size is 256 x 1 bits, the number of chips required to make 1 k byte memory is

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Q. Computers use RC circuit for edge triggering.

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Q. The function Y = AC + BD + EF is

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Q. Assertion (A): A multiplexer can be used for data routing.

Reason (R): A multiplexer has one input and many outputs.

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Q. TTL is used in electronic calculators.

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Q. Inverter 74 LS04 has following specifications I0H max = - 0.4 mA, I0L max = 8 mA, IIH max = 20 μA, IIL max = 0.1 mAThe fan out of this inverter is

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Q. A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is

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Q. The number FF in hexadecimal system is equivalent to number __________ in decimal system.

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Q. The number of switching functions of 3 variables are

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Q. The applications of shift registers are

1. Time delay
2. Ring counter
3. Serial to parallel data conversion
4. Serial to serial data conversion

Which of the above are correct?

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Q. Assertion (A): ECL is fast as compared to TTL.

Reason (R): ECL dissipates less power than TTL.

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Q. Assertion (A): Synchronous counter has higher speed of operation than ripple counter

Reason (R): Synchronous counter uses high speed flip flops.

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Q. What will be the maximum conversion time in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

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Q. A multilevel decoder is more costly as compared to single level decoder.

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Q. EPROM can be

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