MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Which has the same power spectral density? |
| A. | White noise |
| B. | Brown noise |
| C. | White & Brown noise |
| D. | None of the mentioned |
| Answer» B. Brown noise | |
| 2. |
Flicker noise is called as |
| A. | White noise |
| B. | Pink noise |
| C. | Brown noise |
| D. | None of the mentioned |
| Answer» C. Brown noise | |
| 3. |
Which occurs due to equilibrium fluctuations? |
| A. | Thermal noise |
| B. | Johnson noise |
| C. | Thermal & Johnson noise |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
Shot noise is |
| A. | Stochastic process |
| B. | Poisson process |
| C. | Stochastic & Poisson process |
| D. | None of the mentioned |
| Answer» C. Stochastic & Poisson process | |
| 5. |
Shot noise is avoidable when current is |
| A. | Zero |
| B. | One |
| C. | Infinity |
| D. | None of the mentioned |
| Answer» B. One | |
| 6. |
Shot noise is produced by |
| A. | Electrons |
| B. | Photons |
| C. | Electrons & Photons |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
Eigen functions are not orthogonal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Two functions are called as orthogonal if on integrating the product we get |
| A. | One |
| B. | Zero |
| C. | Infinity |
| D. | None of the mentioned |
| Answer» C. Infinity | |
| 9. |
Which offers better SQNR? |
| A. | Delta modulation |
| B. | PCM |
| C. | Delta modulation & PCM |
| D. | None of the mentioned |
| Answer» C. Delta modulation & PCM | |
| 10. |
SQNR can be improved by _______ sampling rate. |
| A. | Increasing |
| B. | Decreasing |
| C. | Does not depend |
| D. | None of the mentioned |
| Answer» B. Decreasing | |