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. |
Multiplication of input signal with pulse train is done in ________ sampling. |
| A. | Impulse sampling |
| B. | Natural sampling |
| C. | Flat top sampling |
| D. | None of the mentioned |
| Answer» C. Flat top sampling | |
| 2. |
Flat top sampling or practical sampling has |
| A. | Same frequency |
| B. | Same amplitude |
| C. | Same time difference |
| D. | None of the mentioned |
| Answer» C. Same time difference | |
| 3. |
MULTIPLICATION_OF_INPUT_SIGNAL_WITH_PULSE_TRAIN_IS_DONE_IN__________SAMPLING.?$ |
| A. | Impulse sampling |
| B. | Natural sampling |
| C. | Flat top sampling |
| D. | None of the mentioned |
| Answer» C. Flat top sampling | |
| 4. |
Flat top sampling or practical sampling ha? |
| A. | Same frequency |
| B. | Same amplitude |
| C. | Same time difference |
| D. | None of the mentioned |
| Answer» C. Same time difference | |
| 5. |
Which process is more economical? |
| A. | Undersampling |
| B. | Oversampling |
| C. | Aliasing |
| D. | None of the mentioned |
| Answer» C. Aliasing | |
| 6. |
Aliasing can be removed using |
| A. | Prefiltering |
| B. | Postfiltering |
| C. | Prefiltering & Postfiltering |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
The effects of aliasing are ________ |
| A. | Attenuation of high frequency spectral replicates |
| B. | Non uniform spectral gain applied to desired baseband spectrum |
| C. | Attenuation and non uniform spectral gain |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
The process in which the top of each pulse in the output samples retains the shape of the analog segment is called as ________ |
| A. | Natural sampling |
| B. | Ideal sampling |
| C. | Aliasing |
| D. | None of the mentioned |
| Answer» B. Ideal sampling | |
| 9. |
The fourier tranform of one impulse train is also another impulse train with a period of the output equal to the |
| A. | Period of the input |
| B. | Reciprocal of the period of input signal |
| C. | Half the period of input |
| D. | Twice the period of the input |
| Answer» C. Half the period of input | |
| 10. |
According to Sampling theorem |
| A. | Ts is greater than 1/2fm |
| B. | Ts is lesser than 1/2fm |
| C. | Ts is equal to 1/2fm |
| D. | Ts is lesser than or equal to 1/2fm |
| Answer» E. | |
| 11. |
The output of sampling process are called as ________ |
| A. | Pulse code modulation |
| B. | Pulse amplitude modulation |
| C. | Frequency modulation |
| D. | Amplitude modulation |
| Answer» C. Frequency modulation | |
| 12. |
The sampling process includes methods such as |
| A. | Filtering |
| B. | Sample and hold |
| C. | Amplifying |
| D. | None of the mentioned |
| Answer» C. Amplifying | |