MCQOPTIONS
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MCQOPTIONS
This section includes 38 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. |
What is the period of cos2t+sin3t? |
| A. | pi |
| B. | 2*pi |
| C. | 3*pi |
| D. | 4*pi |
| Answer» C. 3*pi | |
| 2. |
x(t) or x(n) is defined to be an energy signal, if and only if the total energy content of the signal is a ___________ |
| A. | Finite quantity |
| B. | Infinite |
| C. | Zero |
| D. | None of the mentioned |
| Answer» B. Infinite | |
| 3. |
All energy signals will have an average power of ___________ |
| A. | Infinite |
| B. | Zero |
| C. | Positive |
| D. | Cannot be calculated |
| Answer» C. Positive | |
| 4. |
Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Then the fundamental period of x(t)=x1(t)+x2(t) is? |
| A. | LCM of T1 and T2 |
| B. | HCF of T1and T2 |
| C. | Product of T1 and T2 |
| D. | Ratio of T1 to T2 |
| Answer» B. HCF of T1and T2 | |
| 5. |
Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Which of the following must be a rational number for x(t)=x1(t)+x2(t) to be periodic? |
| A. | T1+T2 |
| B. | T1-T2 |
| C. | T1/T2 |
| D. | T1*T2 |
| Answer» D. T1*T2 | |
| 6. |
For a continuous time signal x(t) to be periodic with a period T, then x(t+mT) should be equal to ___________ |
| A. | x(-t) |
| B. | x(mT) |
| C. | x(mt) |
| D. | x(t) |
| Answer» E. | |
| 7. |
Which of the following is the odd component of the signal x(t)=e(jt)? |
| A. | cost |
| B. | j*sint |
| C. | j*cost |
| D. | sint |
| Answer» C. j*cost | |
| 8. |
The even part of a signal x(t) is? |
| A. | x(t)+x(-t) |
| B. | x(t)-x(-t) |
| C. | (1/2)*(x(t)+x(-t)) |
| D. | (1/2)*(x(t)-x(-t)) |
| Answer» D. (1/2)*(x(t)-x(-t)) | |
| 9. |
The deflection voltage of an oscilloscope is a ‘deterministic’ signal. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following is done to convert a continuous time signal into discrete time signal? |
| A. | Modulating |
| B. | Sampling |
| C. | Differentiating |
| D. | Integrating |
| Answer» C. Differentiating | |
| 11. |
What is the total energy of the signal shown in fig c? |
| A. | 6 |
| B. | 0 |
| C. | 3 |
| D. | 1 |
| Answer» B. 0 | |
| 12. |
What is the total power of the rectangular pulse shown in fig b? |
| A. | 0 |
| B. | 8A2 |
| C. | ∞ |
| D. | 2A |
| Answer» B. 8A2 | |
| 13. |
What is the fundamental frequency of discrete –time wave shown in fig a? |
| A. | π/6 |
| B. | π/3 |
| C. | 2π/8 |
| D. | π |
| Answer» C. 2π/8 | |
| 14. |
Energy signal has zero average power and power signal has zero energy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
Noise generated by an amplifier of radio is an example for? |
| A. | Discrete signal |
| B. | Deterministic signal |
| C. | Random signal |
| D. | Periodic signal |
| Answer» D. Periodic signal | |
| 16. |
Fundamental frequency x[n] is given by ___________ |
| A. | Omega = 2*pi /N |
| B. | Omega = 2*pi*N |
| C. | Omega = 4*pi *2N |
| D. | Omega = pi / N |
| Answer» B. Omega = 2*pi*N | |
| 17. |
X(T)_OR_X(N)_IS_DEFINED_TO_BE_AN_ENERGY_SIGNAL,_IF_AND_ONLY_IF_THE_TOTAL_ENERGY_CONTENT_OF_THE_SIGNAL_IS_A:?$ |
| A. | Finite quantity |
| B. | Infinite |
| C. | Zero |
| D. | None of the mentioned |
| Answer» B. Infinite | |
| 18. |
NOISE_GENERATED_BY_AN_AMPLIFIER_OF_RADIO_IS_AN_EXAMPLE_FOR??$ |
| A. | Discrete signal |
| B. | Deterministic signal |
| C. | Random signal |
| D. | Periodic signal |
| Answer» D. Periodic signal | |
| 19. |
What_is_the_period_of_cos2t+sin3t?$ |
| A. | pi |
| B. | 2*pi |
| C. | 3*pi |
| D. | 4*pi |
| Answer» C. 3*pi | |
| 20. |
Energy_signal_has_zero_average_power_and_power_signal_has_zero_energy.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
What is the total energy of rectangular pulse shown in fig b? |
| A. | 8A<sup>2</sup> |
| B. | 4A |
| C. | 2A |
| D. | 4A<sup>2</sup> |
| Answer» B. 4A | |
| 22. |
Calculate the average power of the discrete-time wave shown in fig a? |
| A. | 1 |
| B. | 6 |
| C. | 0 |
| D. | -1 |
| Answer» B. 6 | |
| 23. |
What_is_the_fundamental_frequency_of_discrete_–time_wave_shown_in_fig_a?$ |
| A. | π/6 |
| B. | π/3 |
| C. | 2π/8 |
| D. | π |
| Answer» B. ‚âà√¨‚àö√ë/3 | |
| 24. |
All energy signals will have an average power of? |
| A. | Infinite |
| B. | Zero |
| C. | Positive |
| D. | Cannot be calculated |
| Answer» C. Positive | |
| 25. |
Fundamental frequency x[n] is given by __________? |
| A. | Omega = 2*pi /N |
| B. | Omega = 2*pi*N |
| C. | Omega = 4*pi *2N |
| D. | Omega = pi / N |
| Answer» B. Omega = 2*pi*N | |
| 26. |
Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Then the fundamental period of x(t)=x1(t)+x2(t) is: |
| A. | LCM of T<sub>1</sub> and T<sub>2</sub> |
| B. | HCF of T<sub>1</sub>and T<sub>2</sub> |
| C. | Product of T<sub>1</sub> and T<sub>2</sub> |
| D. | Ratio of T<sub>1</sub> to T<sub>2</sub> |
| Answer» B. HCF of T<sub>1</sub>and T<sub>2</sub> | |
| 27. |
When x(t ) is said to be non periodic signal? |
| A. | If the equation x (t) = x (t + T) is satisfied for all values of T |
| B. | If the equation x (t) = x (t + T) is satisfied for only one value of T |
| C. | If the equation x (t) = x (t + T) is satisfied for no values of T |
| D. | If the equation x (t) = x (t + T) is satisfied for only odd values of T |
| Answer» D. If the equation x (t) = x (t + T) is satisfied for only odd values of T | |
| 28. |
Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Which of the following must be a rational number for x(t)=x1(t)+x2(t) to be periodic? |
| A. | T<sub>1</sub>+T<sub>2</sub> |
| B. | T<sub>1</sub>-T<sub>2</sub> |
| C. | T<sub>1</sub>/T<sub>2</sub> |
| D. | T<sub>1</sub>*T<sub>2</sub> |
| Answer» D. T<sub>1</sub>*T<sub>2</sub> | |
| 29. |
Which of the following is true for complex-valued function? |
| A. | X (-t) = x*(t) |
| B. | X (-t) = x(t) |
| C. | X (-t) = – x(t) |
| D. | X (-t) = x*(-t) |
| Answer» B. X (-t) = x(t) | |
| 30. |
For a continuous time signal x(t) to be periodic with a period T, then x(t+mT) should be equal to: |
| A. | x(-t) |
| B. | x(mT) |
| C. | x(mt) |
| D. | x(t) |
| Answer» E. | |
| 31. |
If x (-t) = -x (t) then the signal is said to be _____________ |
| A. | Even signal |
| B. | Odd signal |
| C. | Periodic signal |
| D. | Non periodic signal |
| Answer» B. Odd signal | |
| 32. |
Which of the following is the odd component of the signal x(t)=e(jt)? |
| A. | cost |
| B. | j*sint |
| C. | j*cost |
| D. | sint |
| Answer» C. j*cost | |
| 33. |
Even signals are symmetric about the vertical axis. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 34. |
The even part of a signal x(t) is: |
| A. | x(t)+x(-t) |
| B. | x(t)-x(-t) |
| C. | (1/2)*(x(t)+x(-t)) |
| D. | (1/2)*(x(t)-x(-t)) |
| Answer» D. (1/2)*(x(t)-x(-t)) | |
| 35. |
Discrete time signal is derived from continuous time signal by _____________ process. |
| A. | Addition |
| B. | Multiplying |
| C. | Sampling |
| D. | Addition and multiplication |
| Answer» D. Addition and multiplication | |
| 36. |
The deflection voltage of an oscilloscope is a ‘deterministic’$ |
| A. | |
| B. | True |
| Answer» B. True | |
| 37. |
In real valued function and complex valued function, time is _______________ |
| A. | Real |
| B. | Complex |
| C. | Imaginary |
| D. | Not predictable |
| Answer» B. Complex | |
| 38. |
What is single-valued function? |
| A. | Single value for all instants of time |
| B. | Unique value for every instant of time |
| C. | A single pattern is followed by after ‘t’ intervals |
| D. | Different pattern of values is followed by after ‘t’ intervals of time |
| Answer» C. A single pattern is followed by after ‚Äö√Ñ√∂‚àö√ë‚àö‚â§t‚Äö√Ñ√∂‚àö√ë‚àö¬• intervals | |