1's complement of 11100110 is
Answer: A
Replace 1 by 0 and 0 by 1.
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Which device has one input and many outputs?
Answer: B
Demultiplexer takes data from one line and directs it to any of its N output depending on the status of its select lines.
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In digital circuits Schottky transistors are preferred over normal transistors because of their
Answer: A
Schottky transistors have low switching time and hence low propagation delay.
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Assertion (A): A multiplexer can be used for data routing.
Reason (R): A multiplexer has one input and many outputs.
Answer: C
Multiplexer has many inputs but one output.
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The number of switching functions of 3 variables are
Answer: B
No Explanation.
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The access time of a word in 4 MB main memory is 100 ms. The access time of a word in a 32 kb data cache memory is 10 ns. The average data cache bit ratio is 0.95. The efficiency of memory access time is
Answer: B
Access time = 0.95 x 10 + 0.05 x 100.
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Assertion (A): CMOS devices have very high speed.
Reason (R): CMOS devices have very small physical size and simple geometry.
Answer: D
CMOS has high packing density but low speed.
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The function of interface circuit is
Answer: A
Output of driver stage has to be matched with input of load.
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Assertion (A): ECL gate has very high speed of operation.
Reason (R): Transistors in ECL do not go into saturation region.
Answer: A
Since transistors in ECL do not enter saturation state, switching is fast.
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Binary number 11001 is equivalent to decimal number
Answer: D
11001 = 16 + 8 + 1 = 25 in decimal.
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