WAEC Computer Studies questions: Logic gates and Boolean algebra

21 questions with answers and explanations. Tap an option to check yourself.

All topics Algorithms and flowcharts · 21 Application packages · 25 Computer hardware and the CPU · 21 Computer networks and the internet · 23 Computer security, ethics and safety · 22 Data processing and information · 22 Evolution of computing · 23 Input and output devices · 22 Logic gates and Boolean algebra · 21 Memory and storage devices · 23 Number systems and data representation · 24 Programming languages and BASIC · 22 Software and operating systems · 22

Question 1· Logic gates and Boolean algebra· WAEC
An XOR gate with inputs A = 1 and B = 1 gives an output of
Explanation and discussion
Question 2· Logic gates and Boolean algebra· WAEC
A NAND gate with inputs A = 1 and B = 1 gives
Explanation and discussion
Question 3· Logic gates and Boolean algebra· WAEC
An AND gate gives output 1 only when
Explanation and discussion
Question 4· Logic gates and Boolean algebra· WAEC
An OR gate gives an output of 0 only when
Explanation and discussion
Question 5· Logic gates and Boolean algebra· WAEC
A NOR gate with both inputs 0 gives
Explanation and discussion
Question 6· Logic gates and Boolean algebra· WAEC
A NOR gate with inputs A = 0 and B = 0 gives an output of
Explanation and discussion
Question 7· Logic gates and Boolean algebra· WAEC
An XOR gate gives 1 when
Explanation and discussion
Question 8· Logic gates and Boolean algebra· WAEC
Which Boolean expression represents an OR gate with inputs A and B?
Explanation and discussion
Question 9· Logic gates and Boolean algebra· WAEC
An XOR gate gives an output of 1 when
Explanation and discussion
Question 10· Logic gates and Boolean algebra· WAEC
For an AND gate with inputs A = 1 and B = 0, the output is
Explanation and discussion
Question 11· Logic gates and Boolean algebra· WAEC
A truth table for a gate with two inputs has
Explanation and discussion
Question 12· Logic gates and Boolean algebra· WAEC
An OR gate gives output 0 only when
Explanation and discussion
Question 13· Logic gates and Boolean algebra· WAEC
An XOR gate gives output 1 when
Explanation and discussion
Question 14· Logic gates and Boolean algebra· WAEC
An AND gate gives an output of 1 only when
Explanation and discussion
Question 15· Logic gates and Boolean algebra· WAEC
A circuit outputs 1 only when input A is 1 and input B is NOT 1. Which gate combination does this?
Explanation and discussion
Question 16· Logic gates and Boolean algebra· WAEC
A truth table shows
Explanation and discussion
Question 17· Logic gates and Boolean algebra· WAEC
If the input to a NOT gate is 1, the output is
Explanation and discussion
Question 18· Logic gates and Boolean algebra· WAEC
A NOT gate with input 1 gives an output of
Explanation and discussion
Question 19· Logic gates and Boolean algebra· WAEC
For inputs A = 1 and B = 0, the output of a NOR gate is
Explanation and discussion
Question 20· Logic gates and Boolean algebra· WAEC
A NAND gate is equivalent to
Explanation and discussion

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WAEC Computer Studies questions: Logic gates and Boolean algebra

An XOR gate with inputs A = 1 and B = 1 gives an output of

A NAND gate with inputs A = 1 and B = 1 gives

An AND gate gives output 1 only when

An OR gate gives an output of 0 only when

A NOR gate with both inputs 0 gives

A NOR gate with inputs A = 0 and B = 0 gives an output of

An XOR gate gives 1 when

Which Boolean expression represents an OR gate with inputs A and B?

An XOR gate gives an output of 1 when

For an AND gate with inputs A = 1 and B = 0, the output is

A truth table for a gate with two inputs has

An OR gate gives output 0 only when

An XOR gate gives output 1 when

An AND gate gives an output of 1 only when

A circuit outputs 1 only when input A is 1 and input B is NOT 1. Which gate combination does this?

A truth table shows

If the input to a NOT gate is 1, the output is

A NOT gate with input 1 gives an output of

For inputs A = 1 and B = 0, the output of a NOR gate is

A NAND gate is equivalent to