MCQOPTIONS
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MCQOPTIONS
This section includes 16 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 capacity per cell is ______ Eb/N0. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Double the |
| D. | Half the |
| Answer» C. Double the | |
| 2. |
Coding gain is defined as |
| A. | Reduction in Eb/N0 |
| B. | Increase in Eb/N0 |
| C. | Same as Eb/N0 |
| D. | None of the mentioned |
| Answer» B. Increase in Eb/N0 | |
| 3. |
In a real time communication system addition of redundant bits leads to |
| A. | More bandwidth requirement |
| B. | Faster rate of transmission |
| C. | More bandwidth requirement & Faster rate of transmission |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
The probability of message error is written as |
| A. | Block error |
| B. | Word error |
| C. | Block & Word error |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
In binary symmetric channel, in the demodulator _____ decision is made. |
| A. | Hard |
| B. | Soft |
| C. | Hard & Soft |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 6. |
IN_A_REAL_TIME_COMMUNICATION_SYSTEM_ADDITION_OF_REDUNDANT_BITS_LEADS_TO?$ |
| A. | More bandwidth requirement |
| B. | Faster rate of transmission |
| C. | More bandwidth requirement & Faster rate of transmission |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
The capacity per cell is ______ Eb/N0.$ |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Double the |
| D. | Half the |
| Answer» C. Double the | |
| 8. |
Coding_gain_is_defined_as$ |
| A. | Reduction in Eb/N0 |
| B. | Increase in Eb/N0 |
| C. | Same as Eb/N0 |
| D. | None of the mentioned |
| Answer» B. Increase in Eb/N0 | |
| 9. |
The probability of message error is written a? |
| A. | Block error |
| B. | Word error |
| C. | Block & Word error |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
The summation operation is performed using _____ logical operation. |
| A. | EX-OR |
| B. | AND |
| C. | OR |
| D. | EX-NOR |
| Answer» B. AND | |
| 11. |
If the parity bit takes value one then the summation of code-word gives |
| A. | Even result |
| B. | Odd result |
| C. | Even & Odd result |
| D. | None of the mentioned |
| Answer» B. Odd result | |
| 12. |
The ratio of redundant bits to data bits is called as |
| A. | Code rate |
| B. | Redundancy rate |
| C. | Symbol rate |
| D. | Transmission rate |
| Answer» C. Symbol rate | |
| 13. |
Which decoders are less complex? |
| A. | Soft decision decoder |
| B. | Hard decision decoder |
| C. | Hard & Soft decision decoder |
| D. | None of the mentioned |
| Answer» C. Hard & Soft decision decoder | |
| 14. |
In Gaussian channel demodulator ______ decision is made. |
| A. | Hard |
| B. | Soft |
| C. | Hard & Soft |
| D. | None of the mentioned |
| Answer» C. Hard & Soft | |
| 15. |
In binary symmetric channel, in the demodulator _____ decision is made. |
| A. | Hard |
| B. | Soft |
| C. | Hard & Soft |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 16. |
Structured sequences are |
| A. | Block codes |
| B. | Convolutional codes |
| C. | Turbo codes |
| D. | All of the mentioned |
| Answer» E. | |