JAMB and WAEC Computer Studies questions: Logic gates and Boolean algebra

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

All topics Algorithms and flowcharts · 39 Application packages · 46 Computer hardware and the CPU · 41 Computer networks and the internet · 45 Computer security, ethics and safety · 40 Data processing and information · 40 Evolution of computing · 42 Input and output devices · 40 Logic gates and Boolean algebra · 39 Memory and storage devices · 44 Number systems and data representation · 47 Programming languages and BASIC · 43 Software and operating systems · 42

Question 1· Logic gates and Boolean algebra· JAMB
The output of a NAND gate with inputs 1 and 1 is
Explanation and discussion
Question 2· Logic gates and Boolean algebra· WAEC
An XOR gate with inputs A = 1 and B = 1 gives an output of
Explanation and discussion
Question 3· Logic gates and Boolean algebra· JAMB
A three-input truth table has
Explanation and discussion
Question 4· Logic gates and Boolean algebra· WAEC
A NAND gate with inputs A = 1 and B = 1 gives
Explanation and discussion
Question 5· Logic gates and Boolean algebra· JAMB
An AND gate with inputs A = 1 and B = 0 gives
Explanation and discussion
Question 6· Logic gates and Boolean algebra· JAMB
In Boolean algebra, A · 0 equals
Explanation and discussion
Question 7· Logic gates and Boolean algebra· WAEC
An AND gate gives output 1 only when
Explanation and discussion
Question 8· Logic gates and Boolean algebra· WAEC
An OR gate gives an output of 0 only when
Explanation and discussion
Question 9· Logic gates and Boolean algebra· JAMB
A truth table for a gate with 3 inputs has how many rows?
Explanation and discussion
Question 10· Logic gates and Boolean algebra· WAEC
A NOR gate with both inputs 0 gives
Explanation and discussion
Question 11· Logic gates and Boolean algebra· WAEC
A NOR gate with inputs A = 0 and B = 0 gives an output of
Explanation and discussion
Question 12· Logic gates and Boolean algebra· WAEC
An XOR gate gives 1 when
Explanation and discussion
Question 13· Logic gates and Boolean algebra· WAEC
Which Boolean expression represents an OR gate with inputs A and B?
Explanation and discussion
Question 14· Logic gates and Boolean algebra· WAEC
An XOR gate gives an output of 1 when
Explanation and discussion
Question 15· Logic gates and Boolean algebra· WAEC
For an AND gate with inputs A = 1 and B = 0, the output is
Explanation and discussion
Question 16· Logic gates and Boolean algebra· WAEC
A truth table for a gate with two inputs has
Explanation and discussion
Question 17· Logic gates and Boolean algebra· WAEC
An OR gate gives output 0 only when
Explanation and discussion
Question 18· Logic gates and Boolean algebra· JAMB
An OR gate with inputs A = 0 and B = 1 gives an output of
Explanation and discussion
Question 19· Logic gates and Boolean algebra· JAMB
A NOR gate gives output 1 only when
Explanation and discussion
Question 20· Logic gates and Boolean algebra· JAMB
The gate whose output is 1 only when its two inputs are different is the
Explanation and discussion

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JAMB and WAEC Computer Studies questions: Logic gates and Boolean algebra

The output of a NAND gate with inputs 1 and 1 is

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

A three-input truth table has

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

An AND gate with inputs A = 1 and B = 0 gives

In Boolean algebra, A · 0 equals

An AND gate gives output 1 only when

An OR gate gives an output of 0 only when

A truth table for a gate with 3 inputs has how many rows?

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 OR gate with inputs A = 0 and B = 1 gives an output of

A NOR gate gives output 1 only when

The gate whose output is 1 only when its two inputs are different is the