Lesson 2.4.1
2.4.1 Boolean logic Quiz: OCR Computer Science, Unit 10
20 questions
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Lesson 2.4.1, Boolean logic: 20 multiple choice questions for the OCR GCSE Computer Science (J277), Unit 10: Boolean logic, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
Which logic gate outputs 1 only when both inputs are 1?
- OR
- NOT
- NAND
- AND
-
Which logic gate outputs 1 when at least one input is 1?
- AND
- OR
- NOT
- NAND
-
What is the output of a NOT gate when the input is 1?
- Null
- True
- 0
- 1
-
What is the output of 1 AND 0?
- Undefined
- 2
- 1
- 0
-
What is the output of 0 OR 1?
- Undefined
- 0
- 2
- 1
-
Which logic operator is also called conjunction?
- NOT
- AND
- OR
- XOR
-
How many rows does the truth table for a gate with two inputs have?
- 3
- 2
- 4
- 8
-
What is the output of NOT (1 AND 1)?
- Undefined
- 0
- 1
- TRUE
-
A door alarm sounds if the door is open AND the alarm is armed. Which gate models this?
- AND
- NAND
- OR
- NOT
-
A light is on if switch A OR switch B is on. Which gate models this?
- NOT
- NAND
- AND
- OR
-
A = 1 and B = 0. What is the output of A AND (NOT B)?
- 0
- 1
- 2
- Undefined
-
A = 1 and B = 0. What is the output of (NOT A) OR B?
- 2
- Undefined
- 1
- 0
-
Which row of a truth table for A AND B gives an output of 1?
- A = 0, B = 1
- A = 1, B = 1
- A = 0, B = 0
- A = 1, B = 0
-
Which Boolean operator is needed if a system activates when either of two conditions is met?
- AND
- NOT
- XOR
- OR
-
A logic diagram sends input A through a NOT gate, then into an AND gate with input B. What is the output when A = 0 and B = 1?
- Undefined
- 2
- 1
- 0
-
A system outputs 1 only when A is 0 and B is 0. Which expression describes this?
- A AND NOT B
- NOT A AND NOT B
- A OR B
- NOT A OR NOT B
-
For A = 0, B = 1 and C = 0, what is the output of (A OR B) AND NOT C?
- 2
- 1
- Undefined
- 0
-
Which expression is equivalent to NOT (A AND B)?
- NOT A OR NOT B
- NOT A AND B
- A OR B
- NOT A AND NOT B
-
How many rows does a truth table with three inputs have?
- 8
- 6
- 3
- 9
-
What is the main benefit of simplifying a logic circuit diagram?
- Fewer gates
- Faster clock
- Higher voltage
- More inputs
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