MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless Mobile Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Adaptive Delta Modulation, the slope error reduces and ___________ |
| A. | Quantization error decreases |
| B. | Quantization error increases |
| C. | Quantization error remains same |
| D. | None of the mentioned |
| Answer» C. Quantization error remains same | |
| 2. |
What is the sequence of operations in PCM? |
| A. | Sampling, quantizing, encoding |
| B. | Quantizing, encoding, sampling |
| C. | Quantizing, sampling, encoding |
| D. | None of the mentioned |
| Answer» B. Quantizing, encoding, sampling | |
| 3. |
The characteristics of compressor in μ-law companding are _________ |
| A. | Continuous in nature |
| B. | Logarithmic in nature |
| C. | Linear in nature |
| D. | Discrete in nature |
| Answer» B. Logarithmic in nature | |
| 4. |
________ is a delayed decision coding technique. |
| A. | Adaptive quantization |
| B. | Uniform quantization |
| C. | Vector quantization |
| D. | Non-uniform quantization |
| Answer» D. Non-uniform quantization | |
| 5. |
Shannon predicted that better performance can be achieved by coding one sample at a time. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
An adaptive quantizer varies its ___________ in accordance to input speech signal power. |
| A. | Level |
| B. | Step size |
| C. | Amplitude |
| D. | Frequency |
| Answer» C. Amplitude | |
| 7. |
Companding technique used in the US is called ____________ |
| A. | μ law |
| B. | A law |
| C. | Hybrid companding |
| D. | Direct companding |
| Answer» B. A law | |
| 8. |
For a n bit quantizer, number of levels is equal to __________ |
| A. | n |
| B. | 2n |
| C. | n2 |
| D. | 2n |
| Answer» C. n2 | |
| 9. |
Quantization is a process of mapping a ________ range of amplitude of a signal into a finite set of __________ amplitudes. |
| A. | Continuous, discrete |
| B. | Discrete, continuous |
| C. | Discrete, discrete |
| D. | Continuous, continuous |
| Answer» B. Discrete, continuous | |
| 10. |
THE_CHARACTERISTICS_OF_COMPRESSOR_IN_‚ÂÀ√≠¬¨‚À´-LAW_COMPANDING_ARE_______?$# |
| A. | Continuous in nature |
| B. | Logarithmic in nature |
| C. | Linear in nature |
| D. | Discrete in nature |
| Answer» B. Logarithmic in nature | |
| 11. |
In Adaptive Delta Modulation, the slope error reduces and _____$ |
| A. | Quantization error decreases |
| B. | Quantization error increases |
| C. | Quantization error remains same |
| D. | None of the above |
| Answer» C. Quantization error remains same | |
| 12. |
What_is_the_sequence_of_operations_in_PCM?$ |
| A. | Sampling, quantizing, encoding |
| B. | Quantizing, encoding, sampling |
| C. | Quantizing, sampling, encoding |
| D. | None of the above |
| Answer» B. Quantizing, encoding, sampling | |
| 13. |
________ is a delayed decision coding technique? |
| A. | Adaptive quantization |
| B. | Uniform quantization |
| C. | Vector quantization |
| D. | Non-uniform quantization |
| Answer» D. Non-uniform quantization | |
| 14. |
Shannon predicted that better performance can be achieved by coding one sample at a time. State whether True or False. |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
An adaptive quantizer varies its _____ in accordance to input speech signal power. |
| A. | Level |
| B. | Step size |
| C. | Amplitude |
| D. | Frequency |
| Answer» C. Amplitude | |
| 16. |
Companding technique used in US is called ______ |
| A. | μ law |
| B. | A law |
| C. | Hybrid companding |
| D. | Direct companding |
| Answer» B. A law | |
| 17. |
Signal to quantization noise ratio of a PCM encoder is given by _________ |
| A. | 6.02n + α |
| B. | 3n + 6.02α |
| C. | n + 6.02α |
| D. | 6.02n + α |
| Answer» E. | |
| 18. |
Distortion produced by quantization is directly proportion to ________ and inversely proportional to ______ |
| A. | Number of levels, step size |
| B. | Amplitude of the signal, step size |
| C. | Square of step size, number of levels |
| D. | Amplitude of the signal, number of levels |
| Answer» D. Amplitude of the signal, number of levels | |
| 19. |
For a n bit quantizer, number of levels is equal to _____ |
| A. | n |
| B. | 2n |
| C. | n<sup>2</sup> |
| D. | 2n |
| Answer» C. n<sup>2</sup> | |
| 20. |
Quantization is a process of mapping a ________ range of amplitude of a signal into a finite set of _____ amplitudes. |
| A. | Continuous, discrete |
| B. | Discrete, continuous |
| C. | Discrete, discrete |
| D. | Continuous, continuous |
| Answer» B. Discrete, continuous | |