GATE ECE 2025 | Combinational Circuits Question 1 | Digital Circuits

GATE ECE 2025

MCQ (Single Correct Answer)

-0.33

A full adder and an XOR gate are used to design a digital circuit with inputs $X, Y$, and $Z$, and output $F$, as shown below. The input $Z$ is connected to the carry-in input of the full adder.

If the input $Z$ is set to logic ' 1 ', then the circuit functions as __________ with $X$ and $Y$ as inputs.

GATE ECE 2025 Digital Circuits - Combinational Circuits Question 1 English

an adder

a subtractor

a multiplier

a binary to Gray code converter

GATE ECE 2023

MCQ (Single Correct Answer)

-0.33

In the circuit shown below, P and Q are the inputs. The logical function realized by the circuit shown below is

GATE ECE 2023 Digital Circuits - Combinational Circuits Question 4 English

Y = PQ

Y = P + Q

Y = $$\mathrm{\overline {PQ} }$$

Y = $$\mathrm{\overline {P+Q} }$$

GATE ECE 2022

MCQ (Single Correct Answer)

-0.33

Consider the 2-bit multiplexer (MUX) shown in the figure. For OUTPUT to be the XOR of C and D, the values for A₀, A₁, A₂ and A₃ are ___________.

GATE ECE 2022 Digital Circuits - Combinational Circuits Question 5 English

A₀ = 0, A₁ = 0, A₂ = 1, A₃ = 1

A₀ = 1, A₁ = 0, A₂ = 1, A₃ = 0

A₀ = 0, A₁ = 1, A₂ = 1, A₃ = 0

A₀ = 1, A₁ = 1, A₂ = 0, A₃ = 0

GATE ECE 2017 Set 2

MCQ (Single Correct Answer)

-0.3

Consider the circuit shown in the figure. GATE ECE 2017 Set 2 Digital Circuits - Combinational Circuits Question 38 English

The Boolean expression F implemented by the circuit is

$$\overline X \,\overline Y \,\overline Z + XY + \,\overline Y \,Z$$

$$\overline X \,Y\,\overline Z + XZ + \,\overline Y \,Z$$

$$\overline X \,Y\,\overline Z + XY + \,\overline Y \,Z$$

$$\overline X \,\overline Y \,\overline Z + XZ + \,\overline Y \,Z$$

GATE ECE Subjects

Signals and Systems

Representation of Continuous Time Signal Fourier Series Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform

Network Theory

State Equations For Networks Network Elements Network Theorems Two Port Networks Transient Response Sinusoidal Steady State Response Network Graphs Miscellaneous

Control Systems

Signal Flow Graph and Block Diagram Time Response Analysis Compensators Basic of Control Systems Frequency Response Analysis Stability Root Locus Diagram State Space Analysis

Digital Circuits

Number System and Code Convertions Boolean Algebra Logic Gates Combinational Circuits Sequential Circuits Semiconductor Memories Logic Families Analog to Digital and Digital to Analog Converters

General Aptitude

Verbal Ability Logical Reasoning Numerical Ability

Electronic Devices and VLSI

Semiconductor Physics PN Junction BJT and FET IC Basics and MOSFET

Analog Circuits

Diodes Bipolar Junction Transistor Frequency Response FET and MOSFET Oscillators Operational Amplifier Feedback Amplifier Power Amplifier 555 Timer

Engineering Mathematics

Linear Algebra Calculus Vector Calculus Complex Variable Probability and Statistics Differential Equations Numerical Methods Transform Theory

Microprocessors

Instruction Set and Programming with 8085 Pin Details of 8085 and Interfacing with 8085

Communications

Fundamentals of Information Theory Noise In Digital Communication Analog Communication Systems Digital Communication Systems Random Signals and Noise

Electromagnetics

Maxwell Equations Transmission Lines Uniform Plane Waves Waveguides Antennas Miscellaneous