Computing · Quick practice · answer shown after each question
Question 1 of 10
For X = (A + B)·C, when A = 0, B = 1 and C = 1, X is
Question 2 of 10
A three-input truth table has eight rows.
Question 3 of 10
For a half adder with inputs A = 1 and B = 1, the outputs are
Question 4 of 10
The expression for a circuit with A and B feeding an AND gate, whose output goes into a NOT gate, is
Question 5 of 10
A NOT gate can be made from a NAND gate by
Question 6 of 10
A logic circuit whose output depends only on its present inputs is
Question 7 of 10
A logic circuit whose output also depends on previous inputs (memory) is
Question 8 of 10
Show how a NOT gate, an AND gate and an OR gate can each be built using only NAND gates.
Question 9 of 10
Combinational circuits have memory of past inputs.
Question 10 of 10
Gates from which every other gate can be built are called ___ gates.
Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.