Q. What is the output of a 4-to-1 multiplexer if the inputs are A=0, B=1, C=0, D=1 and the select lines are S0=1, S1=0?
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Solution
The select lines S0=1 and S1=0 select input B, which is 1.
Correct Answer:
B
— 1
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Q. What is the output of a binary AND operation for inputs 1 and 0?
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Solution
The output of a binary AND operation is 0 when one of the inputs is 0.
Correct Answer:
B
— 0
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Q. What is the output of a binary to BCD converter for the binary input 10010?
A.
0010
B.
0001 0010
C.
0001 0000
D.
0011
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Solution
The binary input 10010 is equal to decimal 18, which is represented in BCD as 0001 0010.
Correct Answer:
B
— 0001 0010
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Q. What is the output of a binary to BCD converter for the binary input 1001?
A.
0001 0001
B.
0000 1001
C.
0000 0001
D.
0000 1000
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Solution
The binary input 1001 is equal to 9 in decimal, which is represented as 0000 1001 in BCD.
Correct Answer:
B
— 0000 1001
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Q. What is the output of a binary to gray code converter for the binary input 1011?
A.
1110
B.
1100
C.
1001
D.
1010
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Solution
The gray code equivalent of the binary number 1011 is 1110.
Correct Answer:
A
— 1110
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Q. What is the output of a D Flip-Flop when the D input is low and the clock signal transitions?
A.
High
B.
Low
C.
Toggle
D.
Undefined
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Solution
The output of a D Flip-Flop will be low when the D input is low at the time of the clock transition.
Correct Answer:
B
— Low
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Q. What is the output of a decimal to binary converter for the decimal number 10?
A.
1010
B.
1001
C.
1100
D.
1110
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Solution
The binary equivalent of the decimal number 10 is 1010.
Correct Answer:
A
— 1010
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Q. What is the output of a full-wave rectifier when given an AC input?
A.
A pure AC signal
B.
A pulsating DC signal
C.
A constant DC voltage
D.
An amplified AC signal
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Solution
A full-wave rectifier converts an AC input into a pulsating DC signal by rectifying both halves of the AC waveform.
Correct Answer:
B
— A pulsating DC signal
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Q. What is the output of a half-wave rectifier when the input is a sine wave?
A.
A sine wave
B.
A square wave
C.
A pulsating DC signal
D.
A constant DC signal
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Solution
The output of a half-wave rectifier when the input is a sine wave is a pulsating DC signal, as it only allows one half of the AC waveform to pass through.
Correct Answer:
C
— A pulsating DC signal
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Q. What is the output of a NAND gate if both inputs are 1?
A.
0
B.
1
C.
undefined
D.
error
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Solution
A NAND gate outputs 0 only when both inputs are 1; otherwise, it outputs 1.
Correct Answer:
A
— 0
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Q. What is the output of a NAND gate if both inputs are true?
A.
True
B.
False
C.
1
D.
0
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Solution
A NAND gate outputs false only when both inputs are true; otherwise, it outputs true.
Correct Answer:
B
— False
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Q. What is the output of a NAND gate when both inputs are low?
A.
0
B.
1
C.
Undefined
D.
Depends on the circuit
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Solution
A NAND gate outputs 1 when at least one input is low; thus, it outputs 1 when both inputs are low.
Correct Answer:
B
— 1
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Q. What is the output of a NOR gate if one input is 1?
A.
0
B.
1
C.
undefined
D.
error
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Solution
A NOR gate outputs 0 if at least one input is 1.
Correct Answer:
A
— 0
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Q. What is the output of a NOR gate when both inputs are true?
A.
True
B.
False
C.
Undefined
D.
High impedance
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Solution
A NOR gate outputs false (0) when any of its inputs are true (1).
Correct Answer:
B
— False
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Q. What is the output of a NOT gate if the input is 0?
A.
0
B.
1
C.
undefined
D.
error
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Solution
The output of a NOT gate is 1 when the input is 0.
Correct Answer:
B
— 1
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Q. What is the output of a NOT gate when the input is 1?
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Solution
A NOT gate inverts the input; thus, if the input is 1, the output is 0.
Correct Answer:
A
— 0
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Q. What is the output of a NOT gate when the input is false?
A.
True
B.
False
C.
1
D.
0
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Solution
A NOT gate inverts the input; if the input is false, the output is true.
Correct Answer:
A
— True
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Q. What is the output of a shift register after shifting a binary '1011' left by 1 position?
A.
0110
B.
1100
C.
1011
D.
10110
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Solution
Shifting '1011' left by 1 position results in '10110'.
Correct Answer:
D
— 10110
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Q. What is the output of an AND gate if both inputs are 1?
A.
0
B.
1
C.
undefined
D.
error
Show solution
Solution
An AND gate outputs 1 only when both inputs are 1.
Correct Answer:
B
— 1
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Q. What is the output of an AND gate if both inputs are true?
A.
True
B.
False
C.
Undefined
D.
None of the above
Show solution
Solution
An AND gate outputs true only when both inputs are true.
Correct Answer:
A
— True
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Q. What is the output of an AND gate when both inputs are high?
A.
0
B.
1
C.
Undefined
D.
Depends on the circuit
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Solution
An AND gate outputs 1 only when both inputs are high (1).
Correct Answer:
B
— 1
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Q. What is the output of an Ex-NOR gate when both inputs are 1?
A.
1
B.
0
C.
Undefined
D.
Both 0 and 1
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Solution
An Ex-NOR gate outputs 1 when both inputs are the same, so for A=1 and B=1, the output is 1.
Correct Answer:
A
— 1
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Q. What is the output of an Ex-NOR gate when both inputs are the same?
A.
0
B.
1
C.
Depends on the circuit
D.
Undefined
Show solution
Solution
An Ex-NOR gate outputs 1 when both inputs are the same.
Correct Answer:
B
— 1
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Q. What is the output of an Ex-OR gate for inputs A=1 and B=1?
A.
1
B.
0
C.
Undefined
D.
Both 0 and 1
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Solution
The Ex-OR gate outputs 0 when both inputs are the same, so for A=1 and B=1, the output is 0.
Correct Answer:
B
— 0
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Q. What is the output of an Ex-OR gate when both inputs are the same?
A.
1
B.
0
C.
Undefined
D.
Both 0 and 1
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Solution
An Ex-OR gate outputs 0 when both inputs are the same (either 0 or 1).
Correct Answer:
B
— 0
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Q. What is the output of an inverting op-amp if the input voltage is 1V and the feedback resistor is twice the input resistor?
A.
0.5V
B.
1V
C.
2V
D.
-2V
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Solution
In an inverting op-amp configuration, if Rf is twice Rin, the output will be -2V for an input of 1V.
Correct Answer:
D
— -2V
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Q. What is the output of an OR gate if both inputs are 0?
A.
0
B.
1
C.
undefined
D.
error
Show solution
Solution
The output of an OR gate is 0 if both inputs are 0.
Correct Answer:
A
— 0
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Q. What is the output of an OR gate if both inputs are false?
A.
True
B.
False
C.
1
D.
0
Show solution
Solution
An OR gate outputs false only when both inputs are false.
Correct Answer:
B
— False
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Q. What is the output of an XOR gate when both inputs are high?
A.
0
B.
1
C.
Undefined
D.
Depends on the circuit
Show solution
Solution
An XOR gate outputs 0 when both inputs are high.
Correct Answer:
A
— 0
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Q. What is the output of the expression A XOR A?
A.
0
B.
1
C.
A
D.
Undefined
Show solution
Solution
The output of A XOR A is always 0.
Correct Answer:
A
— 0
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