Signals and Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Signals and Systems, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Signals and Systems MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Signals and Systems mcq questions that explore various aspects of Signals and Systems problems. Each MCQ is crafted to challenge your understanding of Signals and Systems principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Signals and Systems MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Signals and Systems. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Signals and Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Signals and Systems MCQs | Page 6 of 48

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Q51.
Fourier transform of -jt f(t) is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q52.
DTFT (Discrete time Fourier transform) of x[n] = aโฟโˆช[n] for -1 < a < + 1.

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q53.
The given figure shows a discrete time system consisting of a unit delay system, a multiplier and a summer, such that y(k) = x(k - 1) + 0.5 x(k). This system

a.

is linear

b.

is non linear

c.

may be linear or non linear depending on value

d.

impossible to judge

Discuss
Answer: (a).is linear
Q54.
The joint probability function of two discrete random variable X and Y is given below.
Then E(y) is

a.

40/14

b.

93/14

c.

8/14

d.

16/14

Discuss
Answer: (b).93/14
Q55.
The joint probability function of two discrete random variable X and Y is given below.
Variance ฯƒ² will be

[Hint: ฯƒ² = E(X²) - ฮผ² โ‡’ E(X²) - (E(X))²]

a.

27/6

b.

9/4

c.

40/14

d.

zero

Discuss
Answer: (b).9/4
Q56.
A probability density function is given by p(x) = Ke^(-x²/2) for -โˆž < x < โˆž , The value of K should be

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q57.
The Laplace transform of f(t) is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q58.
In the given figure 15.6 shows a series, R - C circuit fed by a current source i(t). There is an initial voltage vโ‚€ across the capacitor. The system

a.

is linear

b.

is non linear

c.

may be linear or non linear

d.

is linear only if vโ‚€ is zero

Discuss
Answer: (d).is linear only if vโ‚€ is zero
Q59.
If Laplace transform of f(t) is F(s), then

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q60.
Which of the following is the correct Laplace transform of the signal shown in the given figure

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
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