Multiplexer Concepts and Functions

The video tutorial introduces multiplexers, explaining their function as combinational circuits that select binary information from multiple input lines to direct it to a single output line. It covers the role of selector variables, the representation of multiplexers, and the advantages of using them, such as reduced circuit complexity and cost. The tutorial also discusses different types of multiplexers and provides a detailed explanation of the 2 to 1 multiplexer, including its truth table and implementation.

What is the primary function of a multiplexer?

• To store data temporarily

• To convert analog signals to digital

• To select one of many inputs and direct it to a single output

• To amplify signals

What role do select lines play in a multiplexer?

• They amplify the input signals

• They determine which input is connected to the output

• They store the output data

• They convert digital signals to analog

How is the number of select lines in a multiplexer determined?

• By the number of gates used

• By the number of outputs

• By the number of inputs

• By the power of two of the number of inputs

In a 4-to-1 multiplexer, how many select lines are required?

• 4

• 3

• 2

• 1

What is the relationship between the number of inputs (N) and the number of select lines (M) in a multiplexer?

• M = log2(N)

• M = N

• M = 2^N

• M = N^2

Which of the following is an advantage of using multiplexers?

• Increases the cost of the circuit

• Increases circuit complexity

• Reduces the number of gates required

• Increases the number of wires needed

Which component is not reduced by using multiplexers?

• Number of outputs

• Number of wires

• Circuit complexity

• Number of gates

What is the output of a 2-to-1 multiplexer when the select line is 0?

• The output is the first input

• The output is always 1

• The output is the second input

• The output is undefined

What is the purpose of the enable line in a 2-to-1 multiplexer?

• To increase the output

• To disable the circuit when not needed

• To select the input line

• To store the output

How many inputs does a 16-to-1 multiplexer have?

• 8

• 64

• 16

• 32