Logic Circuits III - SS2 ICT Past Questions and Answers - page 1
1
What is the output of an AND gate when both input A and input B are 1?
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A
0
B
1
C
2
D
-1
2
Which gate outputs 1 when at least one of its inputs is 1?
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A
AND gate
B
NOT gate
C
OR gate
D
XOR gate
3
In a NOT gate, what is the output when the input is 0?
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A
0
B
1
C
-1
D
Undefined
4
What is the equation for an OR gate with inputs A and B?
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A
Output = A AND B
B
Output = A OR B
C
Output = NOT A
D
Output = A XOR B
5
How many possible input combinations are there for a 3-input AND gate?
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A
4
B
6
C
8
D
3
6
Which gate is represented by the truth table:
AÂ Â Â Â Â Â Â Â Â Â Â Â BÂ Â Â Â Â Â Â Â Â Â Â Â Output
0Â Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â Â Â 1
0Â Â Â Â Â Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â Â Â Â Â 0
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A
AND gate           Â
B
OR gate
C
NOT gate           Â
D
XOR gate
7
In a NOT gate, what is the output when the input is 1?
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A
0
B
1
C
-1
D
Undefined
8
What is the output of an OR gate when both input A and input B are 0?
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A
0
B
1
C
2
D
-1
9
Which gate is also known as an inverter?
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A
AND gate
B
NOT gate
C
OR gate
D
XOR gate
10
What is the equation for a NOT gate?
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A
Output = A AND B
B
Output = A OR B
C
Output = NOT A
D
Output = A XOR B
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