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 38 of 48

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Q371.
Which of the following is/are not a property/properties power spectral density function Sx(ฯ‰)?

a.

Sx(ฯ‰) is real function of ฯ‰

b.

Sx(ฯ‰) is a even function of ฯ‰

c.

Sx(ฯ‰) is non-positive function of ฯ‰Sx(ฯ‰) โ‰ค 0 for all ฯ‰

d.

All of the above

Discuss
Answer: (c).Sx(ฯ‰) is non-positive function of ฯ‰Sx(ฯ‰) โ‰ค 0 for all ฯ‰
Q372.
A casual LTI system is described by the difference equation

2y[n] = ฮฑy[n - 2] - 2x[n] + ฮฒx[n -1]

The system is stable only if

a.

|ฮฑ| = 2 |ฮฒ| < 2

b.

|ฮฑ| > 2 |ฮฒ| > 2

c.

|ฮฑ| < 2 any value of ฮฒ

d.

|ฮฒ| < 2, any value of ฮฑ

Discuss
Answer: (c).|ฮฑ| < 2 any value of ฮฒ
Q373.
Fourier series is applicable for

a.

periodic

b.

finite duration

c.

non periodic

d.

a and b

Discuss
Answer: (d).a and b
Q374.
Fourier transform F(jฯ‰) of an arbitrary signal has the property

a.

F(jฯ‰) = F(- jฯ‰)

b.

F(jฯ‰) = - F(- jฯ‰)

c.

F(jฯ‰) = F*(- jฯ‰)

d.

F(jฯ‰) = - F*(jฯ‰)

Discuss
Answer: (b).F(jฯ‰) = - F(- jฯ‰)
Q375.
The units of F(jฯ‰) are volt-seconds.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q376.
An excitation is applied to a system at t = T and the response in zero for -โˆž < t < T. This system is

a.

non casual

b.

stable

c.

casual

d.

unstable

Discuss
Answer: (c).casual
Q377.
The signumm function written as [sgn(t)] is defined as

a.

sgn(t) = - 1 for t < 0, = 0 for t = 0 and = 1 for t > 0

b.

sgn(t) = 1 for t < 0, = 0 for t = 0 and = - 1 for t > 0

c.

sgn(t) = 0 for t < 0, = 1 for t = 0 and = 0 for t > 0

d.

sgn(t) = 0 for t < 0, = 1 for t³ 0

Discuss
Answer: (a).sgn(t) = - 1 for t < 0, = 0 for t = 0 and = 1 for t > 0
Q378.
For formation of state equations, resistance of the circuit

a.

should be in tree

b.

should be in cotree

c.

may be in tree or cotree

d.

none of the above

Discuss
Answer: (c).may be in tree or cotree
Q379.
In a Communication system, noise is most likely to affect the signal.

a.

at the transmitter

b.

In the channel

c.

in Information source

d.

at the destination

Discuss
Answer: (b).In the channel
Q380.
Assertion (A): The function ฮด'(t - b) is equal to 0 for t โ‰  b

Reason (R): A number of impulses spaced from one another form an impulse train.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is true, R is false

d.

A is false, R is true

Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
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