MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
COMPONENTS_USED_FOR_GENERATION_OF_TURBO_CODES_ARE?$ |
| A. | Inter leavers |
| B. | Punching pattern |
| C. | Inter leavers & Punching pattern |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 2. |
The inter leaver connected between the two decoders is used to$ |
| A. | Remove error bursts |
| B. | Scatter error bursts |
| C. | Add error bursts |
| D. | None of the mentioned |
| Answer» C. Add error bursts | |
| 3. |
Decoders_are_connected_in_series.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In soft decision approach 0 represents |
| A. | Certainly one |
| B. | Certainly zero |
| C. | Very likely zero |
| D. | Could be either zero or one |
| Answer» E. | |
| 5. |
In soft decision approach 100 means? |
| A. | Certainly one |
| B. | Certainly zero |
| C. | Very likely zero |
| D. | Very likely one |
| Answer» E. | |
| 6. |
In_soft_decision_approach_what_does_-127_mean? |
| A. | Certainly one |
| B. | Certainly zero |
| C. | Very likely zero |
| D. | Very likely one |
| Answer» C. Very likely zero | |
| 7. |
Turbo codes ar? |
| A. | Forward error correction codes |
| B. | Backward error correction codes |
| C. | Error detection codes |
| D. | None of the mentioned |
| Answer» B. Backward error correction codes | |
| 8. |
Average effective information is obtained by |
| A. | Subtracting equivocation from entropy |
| B. | Adding equivocation with entropy |
| C. | Ratio of number of error bits by total number of bits |
| D. | None of the mentioned |
| Answer» B. Adding equivocation with entropy | |
| 9. |
For a error free channel, conditional probability should be |
| A. | Zero |
| B. | One |
| C. | Equal to joint probability |
| D. | Equal to individual probability |
| Answer» B. One | |
| 10. |
Equivocation is the |
| A. | Conditional entropy |
| B. | Joint entropy |
| C. | Individual entropy |
| D. | None of the mentioned |
| Answer» B. Joint entropy | |
| 11. |
Entropy is the measure of |
| A. | Amount of information at the output |
| B. | Amount of information that can be transmitted |
| C. | Number of error bits from total number of bits |
| D. | None of the mentioned |
| Answer» B. Amount of information that can be transmitted | |
| 12. |
Which parameter is called as Shannon limit? |
| A. | PB/N0 |
| B. | EB/N0 |
| C. | EBN0 |
| D. | None of the mentioned |
| Answer» C. EBN0 | |
| 13. |
The capacity relationship is given by |
| A. | C = W log2 ( 1+S/N ) |
| B. | C = 2W log2 ( 1+S/N ) |
| C. | C = W log2 ( 1-S/N ) |
| D. | C = W log10 ( 1+S/N ) |
| Answer» B. C = 2W log2 ( 1+S/N ) | |
| 14. |
The minimum nyquist bandwidth needed for baseband transmission of Rs symbols per second is |
| A. | Rs |
| B. | 2Rs |
| C. | Rs/2 |
| D. | Rs2 |
| Answer» D. Rs2 | |