Computing

Question 1

1A half adder adds

Medium

A. three bits B. two single bits and produces a sum and a carry C. two bytes D. decimal numbers

Question 2

2A flip-flop is used to

Hard

A. display images B. connect networks C. add two numbers D. store one bit of data

Question 3

3A three-input truth table has eight rows.

Easy

A. True B. False

Question 4

4Gates from which every other gate can be built are called ___ gates.

Hard

Your answer (fill in the blank)

Question 5

5The expression for a circuit with A and B feeding an AND gate, whose output goes into a NOT gate, is

Medium

A. NOT(A·B) B. A + B C. Ā·B̄ D. Ā + B

Question 6

6A circuit that stores one bit is a ___.

Hard

Your answer (fill in the blank)

Question 7

7A half adder has two inputs and two outputs.

Medium

A. True B. False

Question 8

8How many rows does a truth table for a three-input circuit need?

Medium

A. 9 B. 8 C. 6 D. 3

Question 9

9For X = (A + B)·C, when A = 0, B = 1 and C = 1, X is

Medium

A. undefined B. 0 C. 1 D. 2

Question 10

10In a half adder, the sum output is produced by

Hard

A. a NOT gate B. an OR gate C. an XOR gate D. an AND gate