CUET PG PYQs for Digital Electronics and Logic Gates with Solutions: Practice CUET PG Previous Year Questions

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Digital Electronics and Logic Gates is an important topic in the Electronics Engineering section in CUET PG exam. Practising this topic will increase your score overall and make your conceptual grip on CUET PG exam stronger.

This article gives you a full set of CUET PG PYQs for Digital Electronics and Logic Gates with explanations for effective preparation. Practice of CUET PG Electronics Engineering PYQs including Digital Electronics and Logic Gates questions regularly will improve accuracy, speed, and confidence in the CUET PG 2026 exam.

CUET PG PYQs for Digital Electronics and Logic Gates with Solutions

1.
The longest wavelength that can be absorbed by silicon, which has the bandgap of \(1.12\) eV, is \(1.1\,\mu m\). If the longest wavelength that can be absorbed by another material is \(0.78\,\mu m\), then the bandgap of this material is :
- \(1.416\) eV
- \(0.886\) eV
- \(1.59\) eV
- \(3.5\) eV
View Solution
2.
Sequence of steps for Boolean function simplification using K-map : A. Write truth table B. Plot minterms on K-map C. Group adjacent 1's D. Write simplified equation Choose the correct answer from the options given below :
- B, C, A, D
- A, B, C, D
- C, A, B, D
- A, B, D, C
View Solution
3.
Arrange the following logic families in the order of increasing power dissipation : A. CMOS B. RTL C. TTL D. ECL Choose the correct answer from the options given below :
- D, B, C, A
- A, C, B, D
- D, C, B, A
- A, D, B, C
View Solution
4.
The content of register (B) and register (C) of 8085 microprocessor are 0AFH and 0BH. It is desired to multiply the content of register B and register C and store the results in accumulator. A part of 8085 program for this purpose is given as : \[ \texttt{MVI A,00H} \] \[ \texttt{LOOP : _________} \] \[ \texttt{_________} \] \[ \texttt{_________} \] \[ \texttt{HLT} \] A sequence of instructions to complete the program would be :
- JNZ LOOP, ADD B, DCR C
- ADD B, JNZ LOOP, DCR C
- DCR C, JNZ LOOP, ADD B
- ADD B, DCR C, JNZ LOOP
View Solution
5.
If 8085 microprocessor adds 87H and 79H, then :
- Both CARRY and ZERO flags will be set to 0
- CARRY flag will be set to 0, ZERO flag to 1
- CARRY flag will be set to 1, ZERO flag to 0
- Both CARRY and ZERO flags will be set to 1
View Solution
6.
In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location :
- 30H
- 24H
- 48H
- 60H
View Solution
7.
Match List - I with List - II (Value of reflection coefficient).
List - I List - II
A. Short circuit
B. Open circuit
C. Line characteristic impedance
D. 2 times of line characteristic impedance I. 0
II. -1
III. +1
IV. +\dfrac{1}{3}
- A-II, B-III, C-III, D-IV
- A-IV, B-III, C-I, D-II
- A-II, B-III, C-I, D-IV
- A-IV, B-I, C-III, D-II
View Solution
8.
The sequence of steps performed by microprocessor to fetch the data byte from memory :
• [A.] The byte is placed in the instruction decoder of the microprocessor.
• [B.] The byte from the memory location is placed on data bus.
• [C.] The control unit sends the control signal RD to enable the memory chip.
• [D.] Bus microprocessor places the 16-bit memory address from program counter on the address bus. Choose the correct answer from the options given below :
- A, B, C, D
- D, C, B, A
- D, B, C, A
- A, C, B, D
View Solution
9.
The uses of silicon dioxide in modern integrated circuit fabrication process :
• [A.] To serve as mask against diffusion of dopants into silicon
• [B.] To provide surface passivation
• [C.] To isolate one device from another device
• [D.] To act as a component in MOS structures
• [E.] To provide electrical isolation of multi-level metallization systems Choose the correct answer from the options given below :
- A, B, C, E
- A, B, C, D, E
- A, B, C, D Only
- A, B, C Only
View Solution
10.
The gates required to build a full adder are :
- 2 Ex-OR gate, 2 AND gate and 1 NOT gate
- 2 Ex-OR gate, and 2 AND gate
- 2 Ex-OR gate, 2 AND gate and OR gate
- 2 Ex-OR gate
View Solution
11.
The most fundamental physical principle that allows light to be transmitted along the optical fiber without significant loss :
- The photoelectric effect
- Total internal reflection
- Bragg's law
- The Seebeck effect
View Solution
12.
The 8085 uses which technique for memory and I/O access ?
- Separate memory and I/O buses
- Multiplexed address/data bus
- Harvard architecture
- Fully asynchronous bus
View Solution
13.
The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called :
- Ion implantation
- Chemical vapor deposition
- Electroplating
- Epitaxy
View Solution
14.
In a microprocessor, the register which holds the address of the next instruction to be fetched is :
- Accumulator
- Program counter
- Stack pointer
- Instruction register
View Solution

List - I	List - II
A. Short circuit B. Open circuit C. Line characteristic impedance D. 2 times of line characteristic impedance	I. 0 II. -1 III. +1 IV. +\dfrac{1}{3}

15.
Match List - I with List - II.
List - I List - II
A. \(\nabla \cdot \vec{D}=\rho\)
B. \(\nabla \cdot \vec{B}=0\)
C. \(\nabla \times \vec{E}=-\dfrac{\partial \vec{B}}{\partial t}\)
D. \(\nabla \times \vec{H}=\vec{J}+\dfrac{\partial \vec{D}}{\partial t}\) I. Faraday's law of electromagnetic induction
II. Ampere-Maxwell law
III. Absence of magnetic monopoles
IV. Gauss's law of electricity

List - I	List - II
A. \(\nabla \cdot \vec{D}=\rho\) B. \(\nabla \cdot \vec{B}=0\) C. \(\nabla \times \vec{E}=-\dfrac{\partial \vec{B}}{\partial t}\) D. \(\nabla \times \vec{H}=\vec{J}+\dfrac{\partial \vec{D}}{\partial t}\)	I. Faraday's law of electromagnetic induction II. Ampere-Maxwell law III. Absence of magnetic monopoles IV. Gauss's law of electricity

A-IV, B-III, C-I, D-II
A-IV, B-III, C-II, D-I
A-III, B-IV, C-I, D-II
A-III, B-IV, C-II, D-I

View Solution

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CUET PG PYQs for Digital Electronics and Logic Gates with Solutions: Practice CUET PG Previous Year Questions

CUET PG PYQs for Digital Electronics and Logic Gates with Solutions

1.
The longest wavelength that can be absorbed by silicon, which has the bandgap of \(1.12\) eV, is \(1.1\,\mu m\). If the longest wavelength that can be absorbed by another material is \(0.78\,\mu m\), then the bandgap of this material is :

2.
Sequence of steps for Boolean function simplification using K-map : A. Write truth table B. Plot minterms on K-map C. Group adjacent 1's D. Write simplified equation Choose the correct answer from the options given below :

3.
Arrange the following logic families in the order of increasing power dissipation : A. CMOS B. RTL C. TTL D. ECL Choose the correct answer from the options given below :

5.
If 8085 microprocessor adds 87H and 79H, then :

6.
In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location :

7.
Match List - I with List - II (Value of reflection coefficient).
List - I List - II
A. Short circuit
B. Open circuit
C. Line characteristic impedance
D. 2 times of line characteristic impedance I. 0
II. -1
III. +1
IV. +\dfrac{1}{3}

10.
The gates required to build a full adder are :

11.
The most fundamental physical principle that allows light to be transmitted along the optical fiber without significant loss :

12.
The 8085 uses which technique for memory and I/O access ?

13.
The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called :

14.
In a microprocessor, the register which holds the address of the next instruction to be fetched is :

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CUET PG PYQs for Digital Electronics and Logic Gates with Solutions

1.The longest wavelength that can be absorbed by silicon, which has the bandgap of \(1.12\) eV, is \(1.1\,\mu m\). If the longest wavelength that can be absorbed by another material is \(0.78\,\mu m\), then the bandgap of this material is :

2.Sequence of steps for Boolean function simplification using K-map : A. Write truth table B. Plot minterms on K-map C. Group adjacent 1's D. Write simplified equation Choose the correct answer from the options given below :

3.Arrange the following logic families in the order of increasing power dissipation : A. CMOS B. RTL C. TTL D. ECL Choose the correct answer from the options given below :

5.If 8085 microprocessor adds 87H and 79H, then :

6.In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location :

7.Match List - I with List - II (Value of reflection coefficient).List - IList - IIA. Short circuitB. Open circuitC. Line characteristic impedanceD. 2 times of line characteristic impedanceI. 0II. -1III. +1IV. +\dfrac{1}{3}

10.The gates required to build a full adder are :

11.The most fundamental physical principle that allows light to be transmitted along the optical fiber without significant loss :

12.The 8085 uses which technique for memory and I/O access ?

13.The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called :

14.In a microprocessor, the register which holds the address of the next instruction to be fetched is :

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1.
The longest wavelength that can be absorbed by silicon, which has the bandgap of \(1.12\) eV, is \(1.1\,\mu m\). If the longest wavelength that can be absorbed by another material is \(0.78\,\mu m\), then the bandgap of this material is :

2.
Sequence of steps for Boolean function simplification using K-map : A. Write truth table B. Plot minterms on K-map C. Group adjacent 1's D. Write simplified equation Choose the correct answer from the options given below :

3.
Arrange the following logic families in the order of increasing power dissipation : A. CMOS B. RTL C. TTL D. ECL Choose the correct answer from the options given below :

5.
If 8085 microprocessor adds 87H and 79H, then :

6.
In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location :

7.
Match List - I with List - II (Value of reflection coefficient).
List - I List - II
A. Short circuit
B. Open circuit
C. Line characteristic impedance
D. 2 times of line characteristic impedance I. 0
II. -1
III. +1
IV. +\dfrac{1}{3}

10.
The gates required to build a full adder are :

11.
The most fundamental physical principle that allows light to be transmitted along the optical fiber without significant loss :

12.
The 8085 uses which technique for memory and I/O access ?

13.
The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called :

14.
In a microprocessor, the register which holds the address of the next instruction to be fetched is :