MCQOPTIONS
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MCQOPTIONS
This section includes 20 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 method requires external authority and is inflexible? |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» B. Closed loop method | |
| 2. |
Which method has two way link? |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» C. Open & Closed loop method | |
| 3. |
Which method has fast acquisition and can work without return link? |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» B. Closed loop method | |
| 4. |
Synchronization is used in system which has |
| A. | Non coherent modulation techniques |
| B. | Many users accessing |
| C. | Non coherent modulation techniques & Many users accessing |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
WHICH_METHOD_HAS_FAST_ACQUISITION_AND_CAN_WORK_WITHOUT_RETURN_LINK??$ |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» B. Closed loop method | |
| 6. |
Which method requires external authority and is inflexible?$ |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» B. Closed loop method | |
| 7. |
Which_method_has_two_way_link?$ |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» C. Open & Closed loop method | |
| 8. |
The system which has ______ signal to noise ratio can tolerate larger timing error. |
| A. | Large |
| B. | Small |
| C. | Large & Small |
| D. | None of the mentioned |
| Answer» B. Small | |
| 9. |
Which reduces the effective distance between signals in signal space? |
| A. | Time error |
| B. | Frequency offset |
| C. | Time error & Frequency offset |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
When a terminal is able to utilize the measurements made on the return link it is called as |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Quasi close loop method |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 11. |
In open loop method, the time reference error __________ with respect to time. |
| A. | Increases exponentially |
| B. | Decreases exponentially |
| C. | Increases quadratically |
| D. | Decreases quadratically |
| Answer» B. Decreases exponentially | |
| 12. |
Which method needs precorrect time? |
| A. | Open loop method |
| B. | Closed loop method |
| C. | Open & Closed loop method |
| D. | None of the mentioned |
| Answer» B. Closed loop method | |
| 13. |
Synchronization is used in system which ha? |
| A. | Non coherent modulation techniques |
| B. | Many users accessing |
| C. | Non coherent modulation techniques & Many users accessing |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
As the synchronization levels increases, cost |
| A. | Decreases |
| B. | Increases |
| C. | Remains the same |
| D. | None of the mentioned |
| Answer» C. Remains the same | |
| 15. |
Transmitter synchronization implies |
| A. | One way communication |
| B. | Two way communication |
| C. | One & Two way communication |
| D. | None of the mentioned |
| Answer» C. One & Two way communication | |
| 16. |
The synchronization necessary for BPSK is |
| A. | Frequency tracking |
| B. | Bit timing |
| C. | Phase tracking |
| D. | All of the mentioned |
| Answer» E. | |
| 17. |
For block codes _____ is necessary. |
| A. | Phase synchronization |
| B. | Frequency synchronization |
| C. | Frame synchronization |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 18. |
Non coherent system requires |
| A. | Phase synchronization |
| B. | Frequency synchronization |
| C. | Phase & Frequency synchronization |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 19. |
Coherent modulation requires ____ level of synchronization. |
| A. | One |
| B. | Two |
| C. | Three |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 20. |
In phase lock which parameter is synchronized |
| A. | Frequency |
| B. | Phase |
| C. | Frequency & Phase |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |