# 18 Lecture

## CS302

### Midterm & Final Term Short Notes

## 2-INPUT 4-BIT MULTIPLEXER

A 2-input 4-bit multiplexer is a digital logic circuit that selects one of four input signals and outputs it based on the values of two selection inputs. It has four data inputs and two control inputs, with each input having a binary value of 0

**Important Mcq's**

Midterm & Finalterm Prepration

Past papers included

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**How many data inputs does a 2-input 4-bit multiplexer have?**a) 2

b) 4

c) 8

d) 16

Answer: b) 4

**How many control inputs does a 2-input 4-bit multiplexer have?**b) 4

c) 8

d) 16

Answer: a) 2

**What is the maximum number of inputs that a 2-input 4-bit multiplexer can select from?**a) 2 b) 4 c) 8 d) 16 Answer: b) 4**In a 2-input 4-bit multiplexer, how many bits are used to represent the selection inputs?**a) 1 b) 2 c) 4 d) 8 Answer: b) 2**What is the output of a 2-input 4-bit multiplexer if the selection inputs are 00 and the data inputs are 0110, 1011, 1100, and 1111?**a) 0110 b) 1011 c) 1100 d) 1111 Answer: a) 0110**What is the output of a 2-input 4-bit multiplexer if the selection inputs are 10 and the data inputs are 0110, 1011, 1100, and 1111?**a) 0110 b) 1011 c) 1100 d) 1111 Answer: d) 1111**What is the truth table for a 2-input 4-bit multiplexer?**a) 16 rows b) 8 rows c) 4 rows d) 2 rows Answer: c) 4 rows**What is the main function of a 2-input 4-bit multiplexer?**a) To convert binary signals into analog signals b) To store data c) To select one input from multiple inputs based on the control inputs d) To perform arithmetic operations Answer: c) To select one input from multiple inputs based on the control inputs**What is the advantage of using a 2-input 4-bit multiplexer in digital circuits?**a) It reduces circuit complexity b) It increases circuit complexity c) It increases the number of wires needed to connect multiple inputs to a single output d) It increases the number of output signals Answer: a) It reduces circuit complexity**Which of the following is NOT a typical application for a 2-input 4-bit multiplexer?**a) Data compression b) Signal routing c) Address decoding d) Arithmetic operations Answer: d) Arithmetic operations

**Subjective Short Notes**

Midterm & Finalterm Prepration

Past papers included

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**What is a 2-input 4-bit multiplexer?****What is the purpose of a 2-input 4-bit multiplexer?****How many data inputs does a 2-input 4-bit multiplexer have?**Answer: A 2-input 4-bit multiplexer has four data inputs.

**How many selection inputs does a 2-input 4-bit multiplexer have?****What is the maximum number of inputs that a 2-input 4-bit multiplexer can select from?**Answer: A 2-input 4-bit multiplexer can select from a maximum of four inputs.

**How is the output of a 2-input 4-bit multiplexer determined?****What is the truth table for a 2-input 4-bit multiplexer?**Answer: The truth table for a 2-input 4-bit multiplexer has four rows and eight columns.**What is the advantage of using a 2-input 4-bit multiplexer in digital circuits?**Answer: The advantage of using a 2-input 4-bit multiplexer in digital circuits is that it reduces circuit complexity by selecting one input from multiple inputs.**What are the typical applications of a 2-input 4-bit multiplexer?**Answer: The typical applications of a 2-input 4-bit multiplexer include signal routing, data compression, and address decoding.

**How is a 2-input 4-bit multiplexer different from a demultiplexer?**