MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
In polybinary signalling method the present bit of binary sequence is algebraically added with ______ number of previous bits. |
| A. | j |
| B. | 2j |
| C. | j+2 |
| D. | j-2 |
| Answer» E. | |
| 2. |
THE_PRIMARY_ADVANTAGE_OF_THIS_METHOD_IS?$ |
| A. | redistribution of spectral density |
| B. | to favor low frequencies |
| C. | redistribution of spectral density & to favor low frequencies |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
Source_encoding_procedure_does$ |
| A. | Sampling |
| B. | Quantization |
| C. | Compression |
| D. | All of the mentioned |
| Answer» E. | |
| 4. |
In polybinary signalling method the present bit of binary sequence is algebraically added with ______ number of previous bits? |
| A. | j |
| B. | 2j |
| C. | j+2 |
| D. | j-2 |
| Answer» E. | |
| 5. |
The method which has greater bandwidth efficiency is called as |
| A. | Duobinary signalling |
| B. | Polybinary signalling |
| C. | Correlative coding |
| D. | All of the mentioned |
| Answer» C. Correlative coding | |
| 6. |
The duobinary filter, He (f) is called as |
| A. | Sine filter |
| B. | Cosine filter |
| C. | Raised cosine filter |
| D. | None of the mentioned |
| Answer» C. Raised cosine filter | |
| 7. |
In precoding technique, the binary sequence is _____ with the previous precoded bit. |
| A. | And-ed |
| B. | Or-ed |
| C. | EXOR-ed |
| D. | Added |
| Answer» D. Added | |
| 8. |
The method using which the error propagation in dubinary signalling can be avoided is |
| A. | Filtering |
| B. | Precoding |
| C. | Postcoding |
| D. | None of the mentioned |
| Answer» C. Postcoding | |
| 9. |
In duobinary signalling method, for M-ary transmission, the number of output obtained is |
| A. | 2M |
| B. | 2M+1 |
| C. | 2M-1 |
| D. | M2 |
| Answer» D. M2 | |
| 10. |
From digital filter we will get the output pulse as the _______ of the current and the previous pulse. |
| A. | Summation |
| B. | Difference |
| C. | Product |
| D. | Ratio |
| Answer» B. Difference | |
| 11. |
The method in which small amount of controlled ISI is introduced into the data stream rather than trying to eliminate it completely is called as |
| A. | Correlative coding |
| B. | Duobinary signalling |
| C. | Partial response signalling |
| D. | All of the mentioned |
| Answer» E. | |