MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Signal Processing knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which bit coder is required to code a signal with 16 levels? |
| A. | 8 bit |
| B. | 4 bit |
| C. | 2 bit |
| D. | 1 bit |
| Answer» C. 2 bit | |
| 2. |
The quality of output signal from A/D converter is measured in terms of ___________ |
| A. | Quantization error |
| B. | Quantization to signal noise ratio |
| C. | Signal to quantization noise ratio |
| D. | Conversion constant |
| Answer» D. Conversion constant | |
| 3. |
If the sampling rate Fs satisfies the sampling theorem, then the relation between quantization errors of analog signal(eq(t)) and discrete-time signal(eq(n)) is? |
| A. | eq(t)=eq(n) |
| B. | eq(t)<eq(n) |
| C. | eq(t)>eq(n) |
| D. | not related |
| Answer» B. eq(t)<eq(n) | |
| 4. |
What is the discrete-time signal obtained after sampling the analog signal x(t)=cos(2000*pi*t)+sin(5000*pi*t) at a sampling rate of 5000 samples/sec? |
| A. | cos(2.5*pi*n)+sin(pi*n) |
| B. | cos(0.4*pi*n)+sin(pi*n) |
| C. | cos(2000*pi*n)+sin(5000*pi*n) |
| D. | none of the mentioned |
| Answer» C. cos(2000*pi*n)+sin(5000*pi*n) | |
| 5. |
If ‘F’ is the frequency of the analog signal, then what is the minimum sampling rate required to avoid aliasing? |
| A. | F |
| B. | 2F |
| C. | 3F |
| D. | 4F |
| Answer» B. 2F | |
| 6. |
The relation between analog frequency ‘F’ and digital frequency ‘f’ is? |
| A. | F=f*T(where T is sampling period) |
| B. | f=F*T |
| C. | No relation |
| D. | f=F*Tc) No relationd) None of the mentioned |
| Answer» C. No relation | |
| 7. |
The difference between the unquantized x(n) and quantized xq(n) is known as ___________ |
| A. | Quantization coefficient |
| B. | Quantization ratio |
| C. | Quantization factor |
| D. | Quantization error |
| Answer» E. | |
| 8. |
The process of converting discrete-time continuous valued signal into discrete-time discrete valued (digital) signal is known as ____________ |
| A. | Sampling |
| B. | Quantization |
| C. | Coding |
| D. | None of the mentioned |
| Answer» C. Coding | |
| 9. |
WHAT_IS_THE_DISCRETE-TIME_SIGNAL_OBTAINED_AFTER_SAMPLING_THE_ANALOG_SIGNAL_X(T)=COS(2000*PI*T)+SIN(5000*PI*T)_AT_A_SAMPLING_RATE_OF_5000SAMPLES/SEC??$ |
| A. | cos(2.5*pi*n)+sin(pi*n) |
| B. | cos(0.4*pi*n)+sin(pi*n) |
| C. | cos(2000*pi*n)+sin(5000*pi*n) |
| D. | none of the mentioned |
| Answer» C. cos(2000*pi*n)+sin(5000*pi*n) | |
| 10. |
The quality of output signal from a A/D converter is measured in terms of:$ |
| A. | Quantization error |
| B. | Quantization to signal noise ratio |
| C. | Signal to quantization noise ratio |
| D. | Conversion constant |
| Answer» D. Conversion constant | |
| 11. |
If_the_sampling_rate_Fs_satisfies_the_sampling_theorem,_then_the_relation_between_quantization_errors_of_analog_signal(eq(t))_and_discrete-time_signal(eq(n))_is:$ |
| A. | eq(t)=eq(n) |
| B. | eq(t)<eq(n) |
| C. | eq(t)>eq(n) |
| D. | not related |
| Answer» B. eq(t)<eq(n) | |
| 12. |
Which_bit_coder_is_required_to_code_a_signal_with_16_levels? |
| A. | 8 bit |
| B. | 4 bit |
| C. | 2 bit |
| D. | 1 bit |
| Answer» C. 2 bit | |
| 13. |
What is the nyquist rate of the signal x(t)=3cos(50*pi*t)+10sin(300*pi*t)-cos(100*pi*t)? |
| A. | 50Hz |
| B. | 100Hz |
| C. | 200Hz |
| D. | 300Hz |
| Answer» E. | |
| 14. |
If ‘F’ is the frequency of the analog signal, then what is the minimum sampling rate required to avoid aliasing?$ |
| A. | F |
| B. | 2F |
| C. | 3F |
| D. | 4F |
| Answer» B. 2F | |
| 15. |
What is output signal when a signal x(t)=cos(2*pi*40*t) is sampled with a sampling frequency of 20Hz? |
| A. | cos(pi*n) |
| B. | cos(2*pi*n) |
| C. | cos(4*pi*n) |
| D. | cos(8*pi*n) |
| Answer» D. cos(8*pi*n) | |
| 16. |
The relation between analog frequency ‘F’ and digital frequency ‘f’ is:$ |
| A. | F=f*T(where T is sampling period) |
| B. | f=F*T |
| C. | No relation |
| D. | None of the mentioned |
| Answer» C. No relation | |
| 17. |
Which of the following is a digital-to-analog conversion process? |
| A. | Staircase approximation |
| B. | Linear interpolation |
| C. | Quadratic interpolation |
| D. | All of the mentioned |
| Answer» E. | |
| 18. |
The difference between the unquantized x(n) and quantized xq(n) is known as: |
| A. | Quantization coefficient |
| B. | Quantization ratio |
| C. | Quantization factor |
| D. | Quantization error |
| Answer» E. | |
| 19. |
The process of converting discrete-time continuous valued signal into discrete-time discrete valued(digital) signal is known as: |
| A. | Sampling |
| B. | Quantization |
| C. | Coding |
| D. | None of the mentioned |
| Answer» C. Coding | |
| 20. |
Which of the following should be done in order to convert a continuous-time signal to a discrete-time signal? |
| A. | Sampling |
| B. | Differentiating |
| C. | Integrating |
| D. | None of the mentioned |
| Answer» B. Differentiating | |