“Signals and Systems MCQ PDF | 20+ Solved Questions for Exams”

 “Signals and Systems MCQ PDF | 20+ Solved Questions for Exams”

Mastering Signals and Systems MCQs is essential for students preparing for competitive exams like GATE, ESE, UGC NET, and university-level engineering tests. This article provides a Signals and Systems MCQ PDF with 20+ solved questions covering fundamental concepts such as Fourier Transform, Laplace Transform, convolution, sampling theorem, and system properties. Each question is designed to strengthen your understanding of core topics while improving speed and accuracy in exams. With detailed answers, this MCQ set ensures effective practice and revision. Whether you are preparing for Electrical Engineering exams, Electronics & Communication Engineering, or general aptitude tests, these MCQs will help you boost confidence and score higher. Downloadable and exam-oriented, this resource is perfect for students who want a quick, reliable, and SEO-optimized Signals and Systems MCQ practice set. Stay ahead in your preparation with MCQJourney.com – your trusted platform for GK, Current Affairs, Education, and Exam MCQs.

MCQs with Answers

1. A signal is said to be periodic if:

   • (A) It repeats after a fixed interval

   • (B) It is bounded

   • (C) It is causal

   • (D) None of these

   •   Answer: A

2. The fundamental period of $x(t)=\sin (2\pi t)x(t)\; =\; \backslash sin(2\backslash pi\; t)$ is:

   • (A) 1 sec

   • (B) 0.5 sec

   • (C) 2 sec

   • (D) π sec 

   • Answer: A

3. The Laplace Transform of $e^{-at}u(t)e^\{-at\}u(t)$ is:

   • (A) 1/(s+a)

   • (B) s/(s+a)

   • (C) a/(s+a)

   • (D) None 

   • Answer: A

4. Convolution in time domain corresponds to ______ in frequency domain.

   • (A) Multiplication

   • (B) Addition

   • (C) Division

   • (D) Subtraction 

   • Answer: A

5. Fourier Transform of δ(t) is:

   • (A) 1

   • (B) δ(f)

   • (C) e^(-jωt)

   • (D) None 

   • Answer: A

6. A system is causal if:

   • (A) Output depends only on present and past inputs

   • (B) Output depends on future inputs

   • (C) Output is periodic

   • (D) None

   •   Answer: A

7. Sampling theorem states that a band-limited signal can be reconstructed if sampled at:

   • (A) Less than Nyquist rate

   • (B) Equal to Nyquist rate

   • (C) Greater than Nyquist rate

   • (D) Both B and C 

   • Answer: D

8. The impulse response of a system completely characterizes:

   • (A) Linear system

   • (B) Non-linear system

   • (C) Random system

   • (D) None 

   • Answer: A

9. Energy signals have:

   • (A) Finite energy, infinite power

   • (B) Finite power, infinite energy

   • (C) Finite energy, zero power

   • (D) None

   •   Answer: C

10. Power signals have:

• (A) Finite power, infinite energy

• (B) Finite energy, zero power

• (C) Infinite power, finite energy

• (D) None

•   Answer: A

11. Fourier series is applicable to:

• (A) Periodic signals

• (B) Aperiodic signals

• (C) Random signals

• (D) None 

• Answer: A

12. The Laplace Transform exists if:

• (A) Signal is bounded

• (B) Signal is absolutely integrable

• (C) Signal is periodic

• (D) None 

• Answer: B

13. The ROC (Region of Convergence) of Laplace Transform depends on:

• (A) Signal type

• (B) System stability

• (C) Both A and B

• (D) None 

• Answer: C

14. Parseval’s theorem relates:

• (A) Time domain energy to frequency domain energy

• (B) Power to amplitude

• (C) Convolution to multiplication

• (D) None 

• Answer: A

15. A discrete-time signal is periodic if:

• (A) N samples repeat

• (B) It is bounded

• (C) It is causal

• (D) None 

• Answer: A

16. Z-transform is used for:

• (A) Continuous signals

• (B) Discrete signals

• (C) Random signals

• (D) None 

• Answer: B

17. The inverse Z-transform can be obtained by:

• (A) Long division

• (B) Partial fraction

• (C) Residue method

• (D) All of these 

• Answer: D

18. A stable system has:

• (A) Bounded input → bounded output

• (B) Unbounded input → bounded output

• (C) Bounded input → unbounded output

• (D) None 

• Answer: A

19. The Fourier Transform of a rectangular pulse is:

• (A) Sinc function

• (B) Cosine function

• (C) Delta function

• (D) None 

• Answer: A

20. The Nyquist rate is:

• (A) Twice the highest frequency component

• (B) Equal to highest frequency

• (C) Half the highest frequency

• (D) None

•   Answer: A

📌 Labels 

• Signals and Systems MCQs

• GATE Preparation

• ESE Exam Practice

• Engineering MCQs

• UGC NET MCQs

• Competitive Exams

• Education Resources

📌 Hashtags 

#SignalsAndSystems #MCQJourney #EngineeringMCQs #GATE2025 #ESEPrep #UGCNET #ExamPreparation #GKMCQs #CurrentAffairsMCQs #EducationBlog #StudyResources #SolvedMCQs #CompetitiveExams #ElectricalEngineering #ECEPrep #ExamTips #PracticeMCQs #MCQPDF #ExamReady #StudySmart