1. : What is the primary function of a multiplexer (MUX) in digital circuits?
(A) Combine multiple signals into one
(B) Split a signal into multiple outputs
(C) Perform arithmetic operations
(D) Store data temporarily
2. : What is the primary function of a demultiplexer (DEMUX) in digital circuits?
(A) Combine multiple signals into one
(B) Split a signal into multiple outputs
(C) Perform arithmetic operations
(D) Store data temporarily
3. : Which of the following statements about multiplexers is true?
(A) They have one input and multiple outputs.
(B) They have multiple inputs and one output.
(C) They perform logical operations.
(D) They store data for later use.
4. : Which of the following statements about demultiplexers is true?
(A) They have one input and multiple outputs.
(B) They have multiple inputs and one output.
(C) They perform logical operations.
(D) They store data for later use.
5. : What is the primary purpose of a multiplexer with n select lines?
(A) To select one of n input signals to be routed to the output
(B) To combine n input signals into one output
(C) To perform n logical operations simultaneously
(D) To store n bits of data temporarily
6. : What is the primary purpose of a demultiplexer with n select lines?
(A) To select one of n output signals from the input
(B) To split the input signal into n outputs
(C) To perform n logical operations simultaneously
(D) To store n bits of data temporarily
7. : Which gate is commonly used internally in multiplexers?
(A) XOR gate
(B) AND gate
(C) OR gate
(D) NAND gate
8. : Which gate is commonly used internally in demultiplexers?
(A) XOR gate
(B) AND gate
(C) OR gate
(D) NAND gate
9. : What is the minimum number of select lines required for an 8-to-1 multiplexer?
(A) 2
(B) 3
(C) 4
(D) 8
10. : What is the minimum number of select lines required for a 1-to-8 demultiplexer?
(A) 2
(B) 3
(C) 4
(D) 8
11. : Which of the following is a characteristic of multiplexers?
(A) They reduce the number of inputs.
(B) They increase the number of outputs.
(C) They are used for parallel-to-serial conversion.
(D) They perform logical operations.
12. : Which of the following is a characteristic of demultiplexers?
(A) They reduce the number of inputs.
(B) They increase the number of outputs.
(C) They are used for serial-to-parallel conversion.
(D) They perform logical operations.
13. : In a 4-to-1 multiplexer, how many data input lines are there?
(A) 1
(B) 2
(C) 4
(D) 8
14. : In a 1-to-4 demultiplexer, how many output lines are there?
(A) 1
(B) 2
(C) 4
(D) 8
15. : Which gate is used for selecting the input lines in a multiplexer?
(A) XOR gate
(B) AND gate
(C) OR gate
(D) NAND gate
16. : Which gate is used for selecting the output lines in a demultiplexer?
(A) XOR gate
(B) AND gate
(C) OR gate
(D) NAND gate
