MCQOPTIONS
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MCQOPTIONS
This section includes 19 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 rake receiver uses multiple |
| A. | Delay circuits |
| B. | Correlators |
| C. | Detectors |
| D. | None of the mentioned |
| Answer» C. Detectors | |
| 2. |
Information reliability depends on |
| A. | Magnitude of each component |
| B. | Time of arrival of each component |
| C. | Magnitude & Time of arrival of each component |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
Rake receiver does |
| A. | Counter effects multi-path fading |
| B. | Resembles equalizer |
| C. | Resembles equalizer & Counter effects multi-path fading |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
Interleaving does |
| A. | Forward error correction |
| B. | Backward error correction |
| C. | Forward & Backward error correction |
| D. | None of the mentioned |
| Answer» B. Backward error correction | |
| 5. |
Uncorrelated fading occurs when |
| A. | Time span is small |
| B. | Time span is large |
| C. | Does not depend on time span |
| D. | None of the mentioned |
| Answer» C. Does not depend on time span | |
| 6. |
INTERLEAVING_DOES?$ |
| A. | Forward error correction |
| B. | Backward error correction |
| C. | Forward & Backward error correction |
| D. | None of the mentioned |
| Answer» B. Backward error correction | |
| 7. |
Information reliability depends on$ |
| A. | Magnitude of each component |
| B. | Time of arrival of each component |
| C. | Magnitude & Time of arrival of each component |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
Rake_receiver_does$ |
| A. | Counter effects multi-path fading |
| B. | Resembles equalizer |
| C. | Resembles equalizer & Counter effects multi-path fading |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 9. |
The rake receivers functions are similar to |
| A. | Equalizer |
| B. | Matched filter |
| C. | Equalizer & Matched filter |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
Rake receivers are used in |
| A. | Radio astronomy |
| B. | CDMA |
| C. | W-CDMA |
| D. | All of the mentioned |
| Answer» E. | |
| 11. |
A_rake_receiver_uses_multiple |
| A. | Delay circuits |
| B. | Correlators |
| C. | Detectors |
| D. | None of the mentioned |
| Answer» C. Detectors | |
| 12. |
Uncorrelated fading occurs whe? |
| A. | Time span is small |
| B. | Time span is large |
| C. | Does not depend on time span |
| D. | None of the mentioned |
| Answer» C. Does not depend on time span | |
| 13. |
Which signalling scheme is preferred for fading channel? |
| A. | Frequency based modulation |
| B. | Phase based modulation |
| C. | Frequency & Phase based modulation |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
What are the modes of adaptive equalizer? |
| A. | Training mode |
| B. | Tracking mode |
| C. | Training & Tracking mode |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
Diversity technique |
| A. | Provides significant link improvement |
| B. | Needs training overhead |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» B. Needs training overhead | |
| 16. |
Which is more effective and commonly preferred technique? |
| A. | Time diversity |
| B. | Spatial diversity |
| C. | Frequency diversity |
| D. | None of the mentioned |
| Answer» C. Frequency diversity | |
| 17. |
Diversity technique is applied at |
| A. | Base station |
| B. | Mobile receiver |
| C. | Base station & Mobile receiver |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 18. |
Diversity technique is used for combating |
| A. | Fading |
| B. | Error bursts |
| C. | Co-channel interference |
| D. | All of the mentioned |
| Answer» E. | |
| 19. |
The technique for combining diversity signals are |
| A. | Feedback |
| B. | Maximal ratio |
| C. | Equal gain |
| D. | All of the mentioned |
| Answer» E. | |