MCQOPTIONS
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MCQOPTIONS
This section includes 22 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 needs more signal power? |
| A. | BPSK |
| B. | 16-QAM |
| C. | BPSK & 16-QAM |
| D. | None of the mentioned |
| Answer» C. BPSK & 16-QAM | |
| 2. |
In matched filter _______ is performed. |
| A. | Convolution |
| B. | Correlation |
| C. | Convolution & Correlation |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
Decision making needs |
| A. | Priors |
| B. | Likelihoods |
| C. | Priors & Likelihoods |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
Which noise component plays a role in decision making? |
| A. | Relevant noise |
| B. | Non relevant noise |
| C. | Relevant & Non relevant noise |
| D. | None of the mentioned |
| Answer» B. Non relevant noise | |
| 5. |
Channel noise is |
| A. | Additive |
| B. | White and stationary |
| C. | Has infinite bandwidth |
| D. | All of the mentioned |
| Answer» E. | |
| 6. |
WHICH_NOISE_COMPONENT_PLAYS_A_ROLE_IN_DECISION_MAKING??$ |
| A. | Relevant noise |
| B. | Non relevant noise |
| C. | Relevant & Non relevant noise |
| D. | None of the mentioned |
| Answer» B. Non relevant noise | |
| 7. |
In matched filter _______ is performed.$ |
| A. | Convolution |
| B. | Correlation |
| C. | Convolution & Correlation |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
Decision_making_needs$ |
| A. | Priors |
| B. | Likelihoods |
| C. | Priors & Likelihoods |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 9. |
What are the parameters calculated for an estimator? |
| A. | Error |
| B. | Mean square error |
| C. | Variance |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
For neyman pearson decision criterion, which are important? |
| A. | Probability of false alarm |
| B. | Probability of miss |
| C. | Probability of false alarm & miss |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 11. |
Which signal sets are called as equivalent signal sets? |
| A. | Simplex |
| B. | Bi-orthogonal |
| C. | Simplex & Bi-orthogonal |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 12. |
Symbol error probability can also be determined using upper bound. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Which has higher transmission rate? |
| A. | BPSK |
| B. | 16-QAM |
| C. | BPSK & 16-QAM |
| D. | None of the mentioned |
| Answer» C. BPSK & 16-QAM | |
| 14. |
Which_needs_more_signal_power? |
| A. | BPSK |
| B. | 16-QAM |
| C. | BPSK & 16-QAM |
| D. | None of the mentioned |
| Answer» C. BPSK & 16-QAM | |
| 15. |
Channel noise i? |
| A. | Additive |
| B. | White and stationary |
| C. | Has infinite bandwidth |
| D. | All of the mentioned |
| Answer» E. | |
| 16. |
The inter-leaver is more effective if the vehicle is |
| A. | Fast |
| B. | Slow |
| C. | Fast & Slow |
| D. | None of the mentioned |
| Answer» B. Slow | |
| 17. |
The ISI and adjacent channel interference is removed by |
| A. | Cancelling filter |
| B. | Port processing equalizer |
| C. | Cancelling filter & Port processing equalizer |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 18. |
The decision feedback equalizer has a linear traversal filter which is |
| A. | Feed forward section |
| B. | Feedback section |
| C. | Feed forward section & Feedback section |
| D. | None of the mentioned |
| Answer» B. Feedback section | |
| 19. |
Fast fading can be minimized by |
| A. | Robust modulation |
| B. | Coding and interleaving |
| C. | Robust modulation, Coding and interleaving |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 20. |
How can slow fading be minimized? |
| A. | By diversity technique |
| B. | Error correcting codes |
| C. | By diversity technique & Error correcting codes |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 21. |
How can frequency selective distortion be minimized? |
| A. | By using pilot signal |
| B. | By adaptive equalization |
| C. | By spread spectrum |
| D. | All of the mentioned |
| Answer» E. | |
| 22. |
Fading channel has memory. |
| A. | True |
| B. | False |
| Answer» B. False | |