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Top MCQ

The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.

A. A = 1, B = 1, C = 0B. A = 0, B = 0, C = 0C. A = 1, B = 1, C = 1D. A = 1, B = 0, C = 1

Which of the following logical operations is represented by the + sign in Boolean algebra?

A. inversionB. ANDC. ORD. complementation

Output will be a LOW for any case when one or more inputs are zero for a(n):

A. OR gateB. NOT gateC. AND gateD. NOR gate

Output will be a LOW for any case when one or more inputs are zero for a(n):

A. OR gateB. NOT gateC. AND gateD. NOR gate

A full subtracter circuit requires ________.

A. two inputs and two outputsB. two inputs and three outputsC. three inputs and one outputD. three inputs and two outputs

A decoder converts ________.

A. noncoded information into coded formB. coded information into noncoded formC. HIGHs to LOWsD. LOWs to HIGHs

A demultiplexer has ________.

A. one data input and a number of selection inputs, and they have several outputsB. one input and one outputC. several inputs and several outputsD. several inputs and one output

A flip-flop has ________.

A. one stable stateB. no stable statesC. two stable statesD. none of the above

Convert the fractional binary number 0000.1010 to decimal.

A. 0.625B. 0.125C. 0.550D. 0.100

If half adders and full adders are implemented using gates, then for the addition of two 17 bit numbers (using minimum gates) the number of half adders and full adders required will be

(A) 0, 17(B) 16, 1(C) 1, 16(D) 8, 8

Which of the following expressions is in the sum-of-products (SOP) form?

A. (A + B)(C + D)B. (A)B(CD)C. AB(CD)D. AB + CD

Most demultiplexers facilitate which type of conversion?a) Decimal-to-hexadecimalb) Single input, multiple outputsc) multiple output single inputd) Odd parity to even parity

A combinational circuit is one in which the output depends on the ____________a) Input combination at the timeb) Input combination and the previous outputc) Input combination at that time and the previous input combinationd) Present output and the previous output

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