MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
Noise figure is a parameter that represents a ______ of the system. |
| A. | Noisiness |
| B. | Efficiency |
| C. | Maximum output |
| D. | Maximum power handling capacity |
| Answer» B. Efficiency | |
| 2. |
When two networks are connected in series, its composite noise figure can be given as |
| A. | F1+(F2-1)/G1 |
| B. | F1-(F2-1)/G1 |
| C. | F2+(F1-1)/G1 |
| D. | F1G1+(F2-1) |
| Answer» B. F1-(F2-1)/G1 | |
| 3. |
According to reciprocity theorem, _____ and _____ are identical. |
| A. | Transmitting power and receiving power |
| B. | Transmitting gain and receiving gain |
| C. | Effective area and physical area |
| D. | None of the mentioned |
| Answer» C. Effective area and physical area | |
| 4. |
In continuous ARQ will pullback uses _____ system. |
| A. | Half duplex |
| B. | Full duplex |
| C. | Simplex |
| D. | None of the mentioned |
| Answer» C. Simplex | |
| 5. |
Effective radiated power of an isotropic radiator can be given as a product of |
| A. | Radiated power and received power |
| B. | Effective area and physical area |
| C. | Transmitted power and transmitting gain |
| D. | Receiving power and receiving gain |
| Answer» D. Receiving power and receiving gain | |
| 6. |
The stop and wait ARQ needs _______ connection. |
| A. | Half duplex |
| B. | Full duplex |
| C. | Simplex |
| D. | None of the mentioned |
| Answer» B. Full duplex | |
| 7. |
Which method requires less redundancy? |
| A. | Error detection |
| B. | Error correction |
| C. | Error detection & correction |
| D. | None of the mentioned |
| Answer» B. Error correction | |
| 8. |
Visibility is ________ to required availability. |
| A. | Proportional |
| B. | Inversely proportional |
| C. | Equal |
| D. | Not related |
| Answer» C. Equal | |
| 9. |
AM-to-AM conversion brings about |
| A. | Amplitude variation |
| B. | Phase variation |
| C. | Frequency variation |
| D. | None of the mentioned |
| Answer» B. Phase variation | |
| 10. |
Field of view is ______ to antenna gain. |
| A. | Proportional |
| B. | Inversely proportional |
| C. | Half the |
| D. | Double |
| Answer» C. Half the | |
| 11. |
In which repeaters uplink is decoupled from the downlink? |
| A. | Regenerative |
| B. | Non regenerative |
| C. | Regenerative & Non regenerative |
| D. | None of the mentioned |
| Answer» B. Non regenerative | |
| 12. |
Antenna's efficiency is given by the ratio of |
| A. | Effective aperture to physical aperture |
| B. | Physical aperture to effective aperture |
| C. | Signal power to noise power |
| D. | Losses |
| Answer» B. Physical aperture to effective aperture | |
| 13. |
Noise figure measures the |
| A. | Power degradation |
| B. | Noise degradation |
| C. | SNR degradation |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
AM-to-PM conversion brings about |
| A. | Amplitude variation |
| B. | Phase variation |
| C. | Frequency variation |
| D. | None of the mentioned |
| Answer» C. Frequency variation | |