MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
The ratio of average signal power and quantization noise is |
| A. | 3L2 |
| B. | L2/3 |
| C. | 2L3 |
| D. | L3/2 |
| Answer» B. L2/3 | |
| 2. |
Signal to noise ratio is infinite when |
| A. | Quantization noise is zero |
| B. | Number of levels are infinite |
| C. | Quantization noise is zero & Number of levels are infinite |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
Signal to noise ratio increases as ___________ increases. |
| A. | Quantization level |
| B. | Square of quantization level |
| C. | Square root of quantization level |
| D. | None of the mentioned |
| Answer» C. Square root of quantization level | |
| 4. |
The _____________ corresponds to average quantization noise power. |
| A. | Mean |
| B. | Variance |
| C. | Probability density function |
| D. | None of the mentioned |
| Answer» C. Probability density function | |
| 5. |
SIGNAL_TO_NOISE_RATIO_IS_INFINITE_WHEN?$ |
| A. | Quantization noise is zero |
| B. | Number of levels are infinite |
| C. | Quantization noise is zero & Number of levels are infinite |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 6. |
SIGNAL_TO_NOISE_RATIO_INCREASES_AS_____________INCREASES.?$ |
| A. | Quantization level |
| B. | Square of quantization level |
| C. | Square root of quantization level |
| D. | None of the mentioned |
| Answer» C. Square root of quantization level | |
| 7. |
The ratio of average signal power and quantization noise is$ |
| A. | 3L<sup>2</sup> |
| B. | L<sup>2/3</sup> |
| C. | 2L<sup>3</sup> |
| D. | L<sup>3/2</sup> |
| Answer» B. L<sup>2/3</sup> | |
| 8. |
The _____________ corresponds to average quantization noise power? |
| A. | Mean |
| B. | Variance |
| C. | Probability density function |
| D. | None of the mentioned |
| Answer» C. Probability density function | |
| 9. |
When channel bandwidth is greater than the pulse bandwidth, it causes |
| A. | Intersignal interference |
| B. | Intersymbol interference |
| C. | Bandwidth error |
| D. | None of the mentioned |
| Answer» C. Bandwidth error | |
| 10. |
The reasons for the threshold effect are |
| A. | Thermal noise |
| B. | Interference from other users |
| C. | Interference from circuit switching transients |
| D. | All of the mentioned |
| Answer» E. | |
| 11. |
Timing jitter can be reduced by |
| A. | Good power supply isolation |
| B. | Stable clock reference |
| C. | Good power supply isolation & Stable clock reference |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 12. |
Saturation noises can be avoided or reduced by |
| A. | Automatic gain control |
| B. | Amplifying |
| C. | Filtering |
| D. | None of the mentioned |
| Answer» B. Amplifying | |
| 13. |
In quantization process, the amount of quantization noise is _______________ to number of levels. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Independent |
| D. | None of the mentioned |
| Answer» C. Independent | |
| 14. |
The distortion in quantization is called as |
| A. | Round off error |
| B. | Truncation error |
| C. | Round off & Truncation error |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
The main sources of corruption are |
| A. | Sampling and quantizing effects |
| B. | Channel effects |
| C. | Sampling, quantizing and channel effects |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |