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GATE Electronics & Communication

2,058 questions · 40 years · 19 subjects

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Practice Electronics & Communication PYQs

45 questions shown in Mathematics. Filter for cleaner practice sessions.

Showing Mathematics PYQs from Electronics & Communication.
2026 Q4

Real numbers y, p, and n (all greater than 1) satisfy $(\log_{p^{1/n}} y)(\log_{y^{1/n}} p) = 16$, where the logarithms are taken to the bases $p^{1/n}$ and $y^{1/n}$. The value of...

Mathematics/MCQ/answer key
2026 Q8

Let Pk represent the perimeter of a square with sides of length k. The value of the expression P₁ + P₂ + P₃ + ⋯ + P₁₀ is

Mathematics/MCQ/answer key
2025 Q7

A stick of length one meter is broken at two locations at distances of b₁ and b₂ from the origin (0), as shown in the figure. Note that 0 < b₁ < b₂ < 1. Which one of the following...

Mathematics/MCQ/answer key
2025 Q12

Consider the following series: (i) $\sum_{n=1}^{\infty} \frac{1}{\sqrt{n}}$ (ii) $\sum_{n=1}^{\infty} \frac{1}{n(n+1)}$ (iii) $\sum_{n=1}^{\infty} \frac{1}{n!}$ Choose the correct...

Mathematics/MCQ/answer key
2025 Q13

A pot contains two red balls and two blue balls. Two balls are drawn from this pot randomly without replacement. What is the probability that the two balls drawn have different col...

Mathematics/MCQ/answer key
2025 Q25

Consider the function $f: \mathbb{R} \rightarrow \mathbb{R}$, defined as $f(x) = 2x^3 - 3x^2 - 12x + 1$. Which of the following statements is/are correct? (Here, $\mathbb{R}$ is th...

Mathematics/MCQ/answer key
2025 Q51

Consider a non-negative function $f(x)$ which is continuous and bounded over the interval [2, 8]. Let $M$ and $m$ denote, respectively, the maximum and the minimum values of $f(x)$...

Mathematics/MCQ/answer key
2024 Q4

For a real number x > 1, $\frac{1}{\log_2 x} + \frac{1}{\log_3 x} + \frac{1}{\log_4 x} = 1$. The value of x is

Mathematics/MCQ
2024 Q5

The greatest prime factor of (3^199 – 3^196) is

Mathematics/MCQ
2024 Q33

Suppose X and Y are independent and identically distributed random variables that are distributed uniformly in the interval [0,1]. The probability that X≥Y is _________.

Mathematics/NAT
2024 Q36

Consider the Earth to be a perfect sphere of radius R. Then the surface area of the region, enclosed by the 60°N latitude circle, that contains the north pole in its interior is __...

Mathematics/MCQ
2020 Q1

The number of 4-digit numbers formed by using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 such that the product of the digits is 0 is ______.

Mathematics/MCQ/answer key
2020 Q2

The number of ways to arrange the letters of the word 'EQUATION' such that all vowels come together is ______.

Mathematics/MCQ/answer key
2020 Q3

The number of ways to choose 4 cards from a pack of 52 playing cards such that all four cards are of the same suit is ______.

Mathematics/MCQ/answer key
2020 Q4

The number of ways to choose 3 men and 2 women from a group of 7 men and 5 women is ______.

Mathematics/MCQ/answer key
2020 Q5

The number of terms in the expansion of $(x+y+z)^n$ is ______.

Mathematics/MCQ/answer key
2020 Q6

The coefficient of $x^3$ in the expansion of $(1+x)^5$ is ______.

Mathematics/MCQ/answer key
2020 Q7

The value of $\sum_{r=0}^{n} \binom{n}{r}$ is ______.

Mathematics/MCQ/answer key
2020 Q8

The value of $\binom{n}{r} + \binom{n}{r-1}$ is ______.

Mathematics/MCQ/answer key
2020 Q9

The number of diagonals in a polygon of $n$ sides is ______.

Mathematics/MCQ/answer key
2020 Q10

The number of ways to distribute 10 identical items among 3 distinct persons such that each person gets at least one item is ______.

Mathematics/MCQ/answer key
2020 Q11

The number of ways to choose 5 balls from a bag containing 6 red balls and 4 blue balls such that at least 3 red balls are chosen is ______.

Mathematics/MCQ/answer key
2020 Q12

The number of ways to seat 5 men and 5 women in a row such that no two women sit together is ______.

Mathematics/MCQ/answer key
2020 Q13

The number of ways to arrange 7 books on a shelf such that two particular books are always together is ______.

Mathematics/MCQ/answer key
2020 Q14

The number of ways to form a committee of 3 members from 6 men and 4 women such that the committee has at least one woman is ______.

Mathematics/MCQ/answer key
2020 Q15

The number of distinct permutations of the letters of the word 'MISSISSIPPI' is ______.

Mathematics/MCQ/answer key
2020 Q16

The number of ways to choose 2 distinct numbers from the set {1, 2, 3, ..., 10} such that their sum is even is ______.

Mathematics/MCQ/answer key
2020 Q17

The number of ways to arrange 3 boys and 3 girls in a row such that no two boys sit together is ______.

Mathematics/MCQ/answer key
2020 Q18

The number of ways to choose 4 items from a set of 10 distinct items is ______.

Mathematics/MCQ/answer key
2020 Q19

The number of ways to form a 3-digit number using the digits 1, 2, 3, 4, 5 without repetition is ______.

Mathematics/MCQ/answer key
2020 Q20

The number of ways to arrange 4 distinct objects in a circle is ______.

Mathematics/MCQ/answer key
2020 Q21

The number of ways to choose 3 students from a class of 10 students for a competition is ______.

Mathematics/MCQ/answer key
2020 Q22

The number of ways to arrange the letters of the word 'APPLE' is ______.

Mathematics/MCQ/answer key
2020 Q23

The number of ways to choose 2 boys and 2 girls from a group of 4 boys and 3 girls is ______.

Mathematics/MCQ/answer key
2020 Q24

The number of ways to distribute 5 identical balls into 3 distinct boxes is ______.

Mathematics/MCQ/answer key
2020 Q25

The number of ways to choose a committee of 5 members from 10 people such that a particular person is always included is ______.

Mathematics/MCQ/answer key
2020 Q26

The number of ways to choose a committee of 5 members from 10 people such that a particular person is always excluded is ______.

Mathematics/MCQ/answer key
2020 Q27

The number of ways to arrange 6 distinct books on a shelf is ______.

Mathematics/MCQ/answer key
2020 Q28

The number of ways to choose 3 items from a set of 7 distinct items is ______.

Mathematics/MCQ/answer key
2020 Q29

The number of ways to form a 4-letter word using the letters of the word 'ROSE' without repetition is ______.

Mathematics/MCQ/answer key
2020 Q30

The number of ways to arrange 5 distinct objects in a row is ______.

Mathematics/MCQ/answer key
2019 Q16

The value of the contour integral $\frac{1}{2\pi j} \oint (z + \frac{1}{z})^2 dz$ evaluated over the unit circle $|z| = 1$ is ________.

Mathematics/MCQ
2019 Q17

The number of distinct eigenvalues of the matrix $A = \begin{bmatrix} 2 & 2 & 3 & 3 \\ 0 & 1 & 1 & 1 \\ 0 & 0 & 3 & 3 \\ 0 & 0 & 0 & 2 \end{bmatrix}$ is equal to ________.

Mathematics/MCQ
2019 Q19

The value of the integral $\int_0^\pi \int_y^\pi \frac{\sin x}{x} dx dy$, is equal to _________.

Mathematics/NAT
2019 Q43

Consider the homogeneous ordinary differential equation $x^2 \frac{d^2y}{dx^2} - 3x \frac{dy}{dx} + 3y = 0$, $x > 0$ with $y(x)$ as a general solution. Given that $y(1) = 1$ and $y...

Mathematics/NAT