MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
PHASE_ENCODED_GROUP_CONSISTS_OF?$ |
| A. | Manchester coding |
| B. | Bi-phase-mark |
| C. | Miller coding |
| D. | All of the mentioned |
| Answer» E. | |
| 2. |
In which waveform logic 1 and logic 0 are represented by opposite one half bit wide pulses?$ |
| A. | Unipolar RZ |
| B. | Bipolar RZ |
| C. | RZ-AMI |
| D. | Manchester coding |
| Answer» C. RZ-AMI | |
| 3. |
In_which_waveform_logic_1_is_represented_by_half_bit_wide_pulse_and_logic_0_is_represented_by_absence_of_pulse?$ |
| A. | Unipolar RZ |
| B. | Bipolar RZ |
| C. | RZ-AMI |
| D. | Manchester coding |
| Answer» B. Bipolar RZ | |
| 4. |
In which waveform logic 1 is represented by equal amplitude alternating pulses? |
| A. | Unipolar RZ |
| B. | Bipolar RZ |
| C. | RZ-AMI |
| D. | Manchester coding |
| Answer» D. Manchester coding | |
| 5. |
The return to zero waveform consists o? |
| A. | Unipolar RZ |
| B. | Bipolar RZ |
| C. | RZ-AMI |
| D. | All of the mentioned |
| Answer» E. | |
| 6. |
NRZ-S is complement of _______ |
| A. | NRZ-L |
| B. | NRZ-M |
| C. | NRZ-L & NRZ-M |
| D. | None of the mentioned |
| Answer» C. NRZ-L & NRZ-M | |
| 7. |
Which method is preferred in magnetic tape recording? |
| A. | NRZ-L |
| B. | NRZ-M |
| C. | NRZ-S |
| D. | None of the mentioned |
| Answer» C. NRZ-S | |
| 8. |
Which method is called as differential encoding? |
| A. | NRZ-L |
| B. | NRZ-M |
| C. | NRZ-S |
| D. | None of the mentioned |
| Answer» C. NRZ-S | |
| 9. |
Which type is used and preferred in digital logic circuits? |
| A. | NRZ-L |
| B. | NRZ-M |
| C. | NRZ-S |
| D. | None of the mentioned |
| Answer» B. NRZ-M | |
| 10. |
Examples of PCM waveforms are |
| A. | Non return to zero |
| B. | Phase encoded |
| C. | Multilevel binary |
| D. | All of the mentioned |
| Answer» E. | |
| 11. |
When pulse code modulation is applied to non binary symbols we obtain waveform called as |
| A. | PCM |
| B. | PAM |
| C. | M-ary |
| D. | line codes |
| Answer» D. line codes | |
| 12. |
Which waveforms are also called as line codes? |
| A. | PCM |
| B. | PAM |
| C. | FM |
| D. | AM |
| Answer» B. PAM | |