MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A unit impulse function has? |
| A. | Large amplitude |
| B. | Zero pulse width |
| C. | Unity weight |
| D. | All of the mentioned |
| Answer» E. | |
| 2. |
Discrete impulse signal is a power or energy signal? |
| A. | Power signal |
| B. | Energy signal |
| C. | Both power and energy signal |
| D. | Neither power or energy signal |
| Answer» C. Both power and energy signal | |
| 3. |
Continuous Impulse signal is a power or energy signal? |
| A. | Power signal |
| B. | Energy signal |
| C. | Both power and energy |
| D. | Neither power nor energy signal |
| Answer» E. | |
| 4. |
Determine the periodicity and also find whether it is a power or energy signal? e(-at)u(t) |
| A. | Periodic and energy signal |
| B. | Non periodic and energy signal |
| C. | Periodic and power signal |
| D. | Periodic and energy signal |
| Answer» C. Periodic and power signal | |
| 5. |
Find the fundamental period of 1+sin^2 (3π/5)n. |
| A. | 10/3 |
| B. | 5 |
| C. | 3π/5 |
| D. | None of the mentioned |
| Answer» C. 3π/5 | |
| 6. |
Find the periodicity of the following signal. x(t)=cos((2π/7)t)sin((3π/5)t) |
| A. | 30 |
| B. | 7 |
| C. | 35 |
| D. | 5/3 |
| Answer» D. 5/3 | |
| 7. |
Check whether the signal is periodic or not?x(t) = cos(4t) + 2sin(8t) |
| A. | Periodic with period π/2 |
| B. | Periodic with period 2 |
| C. | Periodic with period 2/π |
| D. | Not periodic |
| Answer» B. Periodic with period 2 | |
| 8. |
CONTINUOUS_IMPULSE_SIGNAL_IS_A_POWER_OR_ENERGY_SIGNAL??$ |
| A. | Power signal |
| B. | Energy signal |
| C. | Both power and energy |
| D. | Neither power nor energy signal |
| Answer» E. | |
| 9. |
A unit impulse function has?$ |
| A. | Large amplitude |
| B. | Zero pulse width |
| C. | Unity weight |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
Discrete_impulse_signal_is_a_power_or_energy_signal?$ |
| A. | Power signal |
| B. | Energy signal |
| C. | Both power and energy signal |
| D. | Neither power or energy signal |
| Answer» C. Both power and energy signal | |
| 11. |
Determine the periodicity and also find whether it is a power or energy signal? |
| A. | </sup>u(t) |
| B. | Periodic and energy signal |
| C. | Non periodic and energy signal |
| D. | Periodic and power signal |
| Answer» C. Non periodic and energy signal | |
| 12. |
Which signal is said to be power signal? |
| A. | Infinite power and zero energy |
| B. | Infinite power and non-zero energy |
| C. | Finite power and infinite energy |
| D. | Finite power and zero energy |
| Answer» D. Finite power and zero energy | |
| 13. |
Which signal is called as energy signal? |
| A. | Finite energy and zero power |
| B. | Finite energy and non-zero power |
| C. | Infinite energy and zero power |
| D. | Infinite energy and non-zero power |
| Answer» B. Finite energy and non-zero power | |
| 14. |
Find the fundamental period of 1+sin^2 (3π/5)n.$ |
| A. | 10/3 |
| B. | 5 |
| C. | 3π/5 |
| D. | None of the mentioned |
| Answer» C. 3‚âà√¨‚àö√ë/5 | |
| 15. |
Find the periodicity of the following signal. x(t)=cos((2π/7)t)sin((3π/5)t)$ |
| A. | 30 |
| B. | 7 |
| C. | 35 |
| D. | 5/3 |
| Answer» D. 5/3 | |
| 16. |
Check whether the signal is periodic or not? |
| A. | = cos(4t) + 2sin(8t) |
| B. | Periodic with period π/2 |
| C. | Periodic with period 2 |
| D. | Periodic with period 2/π |
| Answer» B. Periodic with period ‚âà√¨‚àö√ë/2 | |
| 17. |
Which of the given signals are periodic? |
| A. | x(t) = 4 cos(5πt) |
| B. | x(t) = u(t) – 1/2 |
| C. | x(t) = 4u(t) + 2sin(3t) |
| D. | x[n] = 2sin(3n) |
| Answer» B. x(t) = u(t) ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1/2 | |
| 18. |
What is the period of a signal x(t)? |
| A. | T |
| B. | 2T |
| C. | T/2 |
| D. | None of the mentioned |
| Answer» B. 2T | |