MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communication knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Determine length of the fiber if attenuation is 5dB/km, splice loss is 2 dB/km, connector loss at source and detector is 3.5 and 2.5. |
| A. | 5 km |
| B. | 4 km |
| C. | 3 km |
| D. | 8 km |
| Answer» C. 3 km | |
| 2. |
Determine total channel loss if connector loss at source and detector is 3.5 and 2.5 dB and attenuation of 5 dB/km. |
| A. | 34 dB |
| B. | 35 dB |
| C. | 36 dB |
| D. | 38 dB |
| Answer» B. 35 dB | |
| 3. |
Determine wavelength of incident optical power if zm=864, incident optical power is -60.7 dB, BT=1 * 107. |
| A. | 1 μs |
| B. | 2 μs |
| C. | 3 μs |
| D. | 4 μs |
| Answer» B. 2 μs | |
| 4. |
Determine incident optical power if zm=864, wavelength = 1μm. |
| A. | -85 dBm |
| B. | -80 dBm |
| C. | -69.7 dBm |
| D. | -60.7 dBm |
| Answer» E. | |
| 5. |
Compute average number of photons incident at receiver in APD if quantum efficiency is 80%, F (M) = 4, SNR = 144. |
| A. | 866 |
| B. | 865 |
| C. | 864 |
| D. | 867 |
| Answer» D. 867 | |
| 6. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine the duration of multi-frame if duration of a frame is 125μs. |
| A. | 2ms |
| B. | 3ms |
| C. | 4ms |
| D. | 10ms |
| Answer» B. 3ms | |
| 7. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine duration of frame with time slot duration of 3.9μs. |
| A. | 125 μs |
| B. | 130 μs |
| C. | 132 μs |
| D. | 133 μs |
| Answer» B. 130 μs | |
| 8. |
DETERMINE_INCIDENT_OPTICAL_POWER_IF_ZM=864,_WAVELENGTH_=_1‚ÂÀ√≠¬¨‚À´M.?$# |
| A. | -85 dBm |
| B. | -80 dBm |
| C. | -69.7 dBm |
| D. | -60.7 dBm |
| Answer» E. | |
| 9. |
Determine total channel loss if connector loss at source and detector is 3.5 and 2.5 dB and attenuation of 5 dB/km.$ |
| A. | 34 dB |
| B. | 35 dB |
| C. | 36 dB |
| D. | 38 dB |
| Answer» B. 35 dB | |
| 10. |
Determine_wavelength_of_incident_optical_power_if_zm=864,_incident_optical_power_is_-60.7_dB,_BT=1_*_107.$ |
| A. | 1 μs |
| B. | 2 μs |
| C. | 3 μs |
| D. | 4 μs |
| Answer» B. 2 ‚âà√≠¬¨‚à´s | |
| 11. |
Determine RMS pulse broadening over 8 km if total RMS pulse broadening is 5.8ns/km. |
| A. | 0.2ns/km |
| B. | 0.1ns/km |
| C. | 0.4ns/km |
| D. | 0.72ns/km |
| Answer» E. | |
| 12. |
Determine total RMS pulse broadening over 8 km if RMS pulse broadening is 0.6ns/km. |
| A. | 3.6 ns |
| B. | 4 ns |
| C. | 4.8 ns |
| D. | 3 ns |
| Answer» D. 3 ns | |
| 13. |
Determine_length_of_the_fiber_if_attenuation_is_5dB/km,_splice_loss_is_2_dB/km,_connector_loss_at_source_and_detector_is_3.5_and_2.5. |
| A. | 5 km |
| B. | 4 km |
| C. | 3 km |
| D. | 8 km |
| Answer» C. 3 km | |
| 14. |
Compute average number of photons incident at receiver in APD if quantum efficiency is 80%, F (M) =4, SNR=144? |
| A. | 866 |
| B. | 865 |
| C. | 864 |
| D. | 867 |
| Answer» D. 867 | |
| 15. |
Determine excess avalanche noise factor F(M) if APD has multiplication factor of 100, carrier ionization rate of 0.02. |
| A. | 3.99 |
| B. | 3.95 |
| C. | 4.3 |
| D. | 4 |
| Answer» C. 4.3 | |
| 16. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine the duration of multi-frame if duration of a frame is 125μs.$ |
| A. | 2ms |
| B. | 3ms |
| C. | 4ms |
| D. | 10ms |
| Answer» B. 3ms | |
| 17. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine duration of frame with time slot duration of 3.9μs.$ |
| A. | 125 μs |
| B. | 130 μs |
| C. | 132 μs |
| D. | 133 μs |
| Answer» B. 130 ‚âà√≠¬¨‚à´s | |
| 18. |
The bit duration is 488 ns. Sampling rate for each channel on 32-channel PCM is 8 KHz encoded into 8 bits. Determine the time slot duration. |
| A. | 3.2 μs |
| B. | 3.1 μs |
| C. | 7 μs |
| D. | 3.9 μs |
| Answer» E. | |
| 19. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine the bit duration with transmission rate of 2.048 M bits/s. |
| A. | 388 ns |
| B. | 490 ns |
| C. | 488 ns |
| D. | 540 ns |
| Answer» D. 540 ns | |
| 20. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine the transmission rate for system with 256 bits in a frame. |
| A. | 2.96Mbits/s |
| B. | 2.048Mbits/s |
| C. | 3.92Mbits/s |
| D. | 4Mbits/s |
| Answer» C. 3.92Mbits/s | |
| 21. |
Sampling rate for each speech channel on 32-channel PCM is 8 KHz each encoded into 8 bits. Determine number of bits in a frame. |
| A. | 64 |
| B. | 128 |
| C. | 32 |
| D. | 256 |
| Answer» E. | |