Q. How many outputs does an 8-to-1 multiplexer have?
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Solution
An 8-to-1 multiplexer has 1 output, which is selected from 8 different input lines.
Correct Answer:
A
— 1
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Q. How many select lines are needed for a 16-to-1 multiplexer?
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Solution
A 16-to-1 multiplexer requires 4 select lines because 2^4 = 16.
Correct Answer:
C
— 4
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Q. In a 4-to-1 multiplexer, how many select lines are required?
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Solution
A 4-to-1 multiplexer requires 2 select lines to choose one of the four input lines.
Correct Answer:
B
— 2
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Q. In a binary to decimal converter, what is the decimal equivalent of the binary number 1011?
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Solution
The binary number 1011 is equal to 1*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 8 + 0 + 2 + 1 = 11.
Correct Answer:
C
— 11
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Q. What is the Gray code equivalent of the binary number 1101?
A.
1011
B.
1110
C.
1000
D.
1010
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Solution
To convert binary 1101 to Gray code, the first bit remains the same (1), and each subsequent bit is found by XORing the current bit with the previous bit: 1 XOR 1 = 0, 1 XOR 0 = 1, 0 XOR 1 = 1, resulting in Gray code 1011.
Correct Answer:
A
— 1011
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Q. What is the main advantage of using a multiplexer in digital circuits?
A.
Reduces the number of data lines
B.
Increases the speed of data processing
C.
Simplifies circuit design
D.
All of the above
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Solution
Multiplexers help reduce the number of data lines, increase processing speed, and simplify circuit design.
Correct Answer:
D
— All of the above
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Q. What is the output of a 2-to-1 multiplexer if the inputs are A=0, B=1 and the select line is 0?
A.
0
B.
1
C.
Undefined
D.
Both 0 and 1
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Solution
If the select line is 0, the output of the 2-to-1 multiplexer will be the value of input A, which is 0.
Correct Answer:
A
— 0
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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 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 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 primary function of a binary to decimal converter?
A.
To convert decimal numbers to binary
B.
To convert binary numbers to decimal
C.
To convert hexadecimal numbers to binary
D.
To convert binary numbers to octal
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Solution
A binary to decimal converter takes a binary number and converts it into its decimal equivalent.
Correct Answer:
B
— To convert binary numbers to decimal
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Q. What type of code converter is used to convert binary numbers to Gray code?
A.
Binary to BCD converter
B.
Binary to Gray code converter
C.
BCD to binary converter
D.
Decimal to binary converter
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Solution
A binary to Gray code converter is specifically designed to convert binary numbers into their corresponding Gray code.
Correct Answer:
B
— Binary to Gray code converter
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Q. What type of code does a binary to Gray code converter produce?
A.
A code that minimizes errors in digital communication
B.
A code that is easier to read
C.
A code that represents numbers in a different base
D.
A code that is used for error detection
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Solution
A binary to Gray code converter produces a code that minimizes errors in digital communication by changing only one bit at a time.
Correct Answer:
A
— A code that minimizes errors in digital communication
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Q. Which logic gate is commonly used to implement a multiplexer?
A.
AND gate
B.
OR gate
C.
NOT gate
D.
NAND gate
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Solution
Multiplexers are commonly implemented using a combination of AND and OR gates.
Correct Answer:
B
— OR gate
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Q. Which of the following is a characteristic of a multiplexer?
A.
It can only handle binary inputs
B.
It can select one input from multiple inputs
C.
It converts binary to decimal
D.
It is a type of memory device
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Solution
A multiplexer is designed to select one input from multiple inputs based on the select lines.
Correct Answer:
B
— It can select one input from multiple inputs
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Q. Which of the following is a common application of a multiplexer?
A.
Data routing
B.
Data storage
C.
Data encryption
D.
Data compression
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Solution
Multiplexers are commonly used for data routing, allowing multiple signals to share a single communication line.
Correct Answer:
A
— Data routing
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Q. Which of the following is NOT a type of multiplexer?
A.
2-to-1 multiplexer
B.
4-to-1 multiplexer
C.
8-to-1 multiplexer
D.
1-to-4 multiplexer
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Solution
A 1-to-4 multiplexer is not a standard type; multiplexers typically have more inputs than outputs.
Correct Answer:
D
— 1-to-4 multiplexer
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