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Digital Electronics MCQ Level- 1 Physics MCQs & solutions - Free


MCQ Practice Test & Solutions: Digital Electronics MCQ Level- 1 (10 Questions)

You can prepare effectively for Physics Topic wise Tests for IIT JAM Physics with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Digital Electronics MCQ Level- 1". These 10 questions have been designed by the experts with the latest curriculum of Physics 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 30 minutes
  • - Number of Questions: 10

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Digital Electronics MCQ Level- 1 - Question 1

Figure-I shows a logic circuit with two inputs A and B and output C. The voltage incorrect waveform of A, B and C are shown in figure-II. The logic circuit is :

Detailed Solution: Question 1

From the waveform A, B and C, it is clear that output is 1, if both B and A are 1 otherwise zero.
C = A . B
The correct answer is: AND gate

Digital Electronics MCQ Level- 1 - Question 2

In Boolean Algebra, will be equal to.

Detailed Solution: Question 2



The correct answer is: 

Digital Electronics MCQ Level- 1 - Question 3

When an input electrical signal A = 10100 is applied to a NOT gate, its output signal  is :

Detailed Solution: Question 3

NOT gate implies output  where A is the input.
The correct answer is: 01011

Digital Electronics MCQ Level- 1 - Question 4

The output Y from the following logic gate circuit will be :

Detailed Solution: Question 4


The correct answer is: 

Digital Electronics MCQ Level- 1 - Question 5

The Boolean expression of the output Y in terms of the inputs A and B for the circuit shown in the following figure is.

Detailed Solution: Question 5

Equivalent circuit is


The correct answer is:  

Digital Electronics MCQ Level- 1 - Question 6

The binary number 110000111101 corresponds to a hexadecimal number. 

Detailed Solution: Question 6

Hexadecimal is written with 16 numbers starting from 0, i.e., 0, 1,2, 3,...14, 15. The number 10 → A; 11 → B; 12 → C; 13 → D; 14 → E; 15 → F in place of two digits. To convert binary number in hexadecimal make the pairs of four numbers starting from right. Then convert them in decimal then hexadecimal e.g. (110000111101) ⇔ [(1100) (0011) (1101)2] in binary number ⇔ [(12) (3) (13) ] in decimal
= C3D is the equivalent hexadecimal number
The correct answer is: C3D

Digital Electronics MCQ Level- 1 - Question 7

Figure I shows a two input type of logic circuit where A and B are the inputs and C is the output. The truth table of the logic gate is shown in Figure II.

Detailed Solution: Question 7

NAND implies 
The correct answer is: NAND

Digital Electronics MCQ Level- 1 - Question 8

Which one of the following logic gate does the given truth table represent?

Detailed Solution: Question 8

⇒ AND gate implies Y=A.B.
The correct answer is: AND

Digital Electronics MCQ Level- 1 - Question 9

The given figure shows the wave forms for two inputs A and B and that for the output V of logic circuit. The logic circuit is :
 

Detailed Solution: Question 9

From the response of A, B and C, it is clear that C = A.B, hence, an AND gate.
The correct answer is: AND gate

Digital Electronics MCQ Level- 1 - Question 10

The truth table for the input NAND gate is given by :

Detailed Solution: Question 10

NAND gate is given as 
The correct answer is:

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