Question 56
Which logic gate is used as a controlled inverter?
Detailed Solution
A XOR 0 = A, A XOR 1 = A'. When control input is 1, it inverts A.
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GATE CSE Digital Logic – Full Comprehensive Mixed Mock Test-1
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Question 57
A 16:1 multiplexer has how many selection inputs?
Detailed Solution
2^$n=16$, so $n=4 selection inputs$.
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Question 58
In a priority encoder, if input line 3 has highest priority and is active, what is the output regardless of inputs 0, 1, and 2?
Detailed Solution
Decimal 3 in 2-bit binary is 11.
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Question 59
A 4-to-16 decoder is built from two 3-to-8 decoders, each with an enable input. The MSB selects which decoder is enabled. How many independent select signals are needed for this decoder-enable selection?
Detailed Solution
The single MSB is the independent selection signal; complementary enable logic selects one of the two decoders.
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Question 60
A multiplexer is also known as:
Detailed Solution
MUX selects one of many input data channels and passes it to the single output line.
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