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Computing

Computing · Quick practice · answer shown after each question

Logic circuits and binary adders

Question 1 of 10

Question 1 of 10

To add two 4-bit numbers, full adders can be connected in a

Question 2 of 10

Question 2 of 10

The expression for a circuit with A and B feeding an AND gate, whose output goes into a NOT gate, is

Question 3 of 10

Question 3 of 10

A logic circuit whose output depends only on its present inputs is

Question 4 of 10

Question 4 of 10

A full adder differs from a half adder because it

Question 5 of 10

Question 5 of 10

For a half adder with inputs A = 1 and B = 1, the outputs are

Question 6 of 10

Question 6 of 10

A half adder adds

Question 7 of 10

Question 7 of 10

The expression X = (A + B)·C describes

Question 8 of 10

Question 8 of 10

An adder with a carry-in input is a ___ adder.

Question 9 of 10

Question 9 of 10

A circuit that stores one bit is a ___.

Question 10 of 10

Question 10 of 10

A logic circuit whose output also depends on previous inputs (memory) is

Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.