Explore topic-wise MCQs in Signals Systems.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Signals Systems knowledge and support exam preparation. Choose a topic below to get started.

1.

A system is said to be causal if the output of the system depends on ___________

A. The Past and Present Inputs
B. The Present Inputs
C. The Future Inputs
D. The Past and Future Inputs
Answer» B. The Present Inputs
Discussion
2.

The difference between the highest and lowest frequencies of a signal is _________

A. Frequency
B. Period
C. Bandwidth
D. Amplitude
Answer» D. Amplitude
Discussion
3.

The system \(x(k) = 7(\frac{1}{3})^k \,u(-k-1) – 6(\frac{1}{2})^k \,u(k)\) is ___________

A. Causal
B. Anti-causal
C. Non-causal
D. Cannot be determined
Answer» D. Cannot be determined
Discussion
4.

A system is said to be dynamic if the output of the system depends on ___________

A. The past Input
B. The Future Input
C. The Present Input
D. Both the Present and future Inputs
Answer» B. The Future Input
Discussion
5.

Which of the following is true about the bounded signal?

A. A finite signal is always bounded
B. A bounded signal always possess finite energy
C. A bounded signal is always zero outside a given interval
D. A bounded signal is always finite
Answer» C. A bounded signal is always zero outside a given interval
Discussion
6.

A signal e-at sin (ωt) is the input to a real linear time-invariant system. Given K and ∅ are constants, the output of the system will be of the form Ke-bt sin (vt + ∅). The correct statement among the following is __________

A. b need not be equal to a but v must be equal to ω
B. v need not be equal to ω but b must be equal to a
C. b must be equal to a and v must be equal to ω
D. b need not be equal to a and v need not be equal to ω
Answer» B. v need not be equal to ω but b must be equal to a
Discussion
7.

If y(t) = ex(t), then the relation is _________

A. Dynamic
B. Static
C. Memory
D. Memoryless but not static
Answer» C. Memory
Discussion
8.

From the given conditions, what are the Dirichlet conditions?i. X(t) should be absolutely integrableii. X(t) should have finite discontinuitiesiii. X(t) should have a finite number of maxima as well as minima in its domain

A. i, ii and iii
B. i and ii
C. i and iii
D. ii and iii
Answer» B. i and ii
Discussion
9.

Given a stable and causal system with impulse response h (t) and system function H(s). Let us suppose H(s) is rational, contains a pole at s=-2 and does not have a zero at origin and location of all other zeroes is unknown, poles are present at some unknown location other than the origin. Then,i) H(s) = H(-s)ii) \(\frac{dh(t)}{dt}\) Contains at least one pole in its Laplace transform.Which of the following options is correct?

A. i – true, ii – true
B. i – false, ii – true
C. i – true, ii – false
D. i – false, ii – false
Answer» C. i – true, ii – false
Discussion
10.

A LTI system is characterized by ___________

A. Unit impulse response
B. Time shifted impulses
C. Unit step responsed) Response to any signal(bounde
D. Response to any signal(bounded)
Answer» B. Time shifted impulses
Discussion
11.

A series RC circuit excited by voltage V is __________

A. A memory less system
B. A causal system
C. A dynamic system
D. Static system
Answer» D. Static system
Discussion
12.

Which of the following is a dynamic system?

A. y(n) = y(n-1) + y(n+1)
B. y(n) = y(n-1)
C. y(n) = x(n)
D. y(n) + y(n+1) + y(n+3) = 0
Answer» B. y(n) = y(n-1)
Discussion
13.

Which of the following is a causal system?

A. y(n) = 3x(n) – 2x(n-1)
B. y(n) = 3x(n) + 2x(n+1)
C. y(n) = 3x(n+1) + 2x(n-1)
D. y(n) = 3x(n+1) + 2x(n-1) + x(n)
Answer» B. y(n) = 3x(n) + 2x(n+1)
Discussion
14.

Which system among the following is a time invariant system?

A. y(n) = n x(n)
B. y(n) = x(n) – x(n-1)
C. y(n) = x(-n)
D. y(n) = x(n) cos 2nf
Answer» C. y(n) = x(-n)
Discussion