DIGITAL MULTIPLERS

What is a multiplexer?

• A. A digital circuit that combines several analog signals into one signal
• B. A digital circuit that combines several digital signals into one signal
• C. A digital circuit that separates several digital signals into separate signals
• D. A digital circuit that separates several analog signals into separate signals

What is the main function of a multiplexer?

• A. To separate signals
• B. To combine signals
• C. To amplify signals
• D. To filter signals

How many inputs does a 4:1 multiplexer have?

• A. 1
• B. 2
• C. 3
• D. 4

A 4:1 multiplexer has how many select lines?

• A. 1
• B. 2
• C. 3
• D. 4

What is the output of a 8:1 multiplexer if the inputs to the select lines are 010?

• A. The output of the 2nd input
• B. The output of the 3rd input
• C. The output of the 4th input
• D. The output of the 5th input

How many output lines does a 8:1 multiplexer have?

• A. 1
• B. 2
• C. 3
• D. 8

What is the output of a 4:1 multiplexer if the inputs to the select lines are 00 and the input lines are 1111, 0000, 0101, and 1010?

• A. 1111
• B. 0000
• C. 0101
• D. 1010

What is the purpose of a demultiplexer?

• A. To combine signals
• B. To separate signals
• C. To amplify signals
• D. To filter signals

What is the difference between a multiplexer and a demultiplexer?

• A. A multiplexer combines signals while a demultiplexer separates signals
• B. A multiplexer separates signals while a demultiplexer combines signals
• C. A multiplexer and a demultiplexer have the same functions
• D. A multiplexer is used for analog signals while a demultiplexer is used for digital signals