MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
If the system has a impulse response as h(n)=Asin(n+1) 0u(n), then the system is known as Digital frequency synthesizer. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The filter with the system function H(z)=z-k is a ____________ |
| A. | Notch filter |
| B. | Band pass filter |
| C. | All pass filter |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
A digital resonator is a special two pole band pass filter with the pair of complex conjugate poles located near the unit circle. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
If the low pass filter described by the difference equation y(n)=0.9y(n-1)+0.1x(n) is converted into a high pass filter, then what is the frequency response of the high pass filter? |
| A. | 0.1/(1+0.9e<sup>j </sup>) |
| B. | 0.1/(1+0.9e<sup>-j </sup>) |
| C. | 0.1/(1-0.9e<sup>j </sup>) |
| D. | None of the mentioned |
| Answer» C. 0.1/(1-0.9e<sup>j </sup>) | |
| 5. |
If hlp(n) denotes the impulse response of a low pass filter with frequency response Hlp( ), then what is the frequency response of the high pass filter in terms of Hlp( )? |
| A. | H<sub>lp</sub>( - /2) |
| B. | H<sub>lp</sub>( + /2) |
| C. | H<sub>lp</sub>( - ) |
| D. | H<sub>lp</sub>( + ) |
| Answer» D. H<sub>lp</sub>( + ) | |
| 6. |
What is the system function for a two pole band pass filter that has the centre of its pass band at = /2, zero its frequency response characteristic at =0 and at = , and its magnitude response is 1/ 2 at =4 /9? |
| A. | (0.15 frac{1-z^{-2}}{1+0.7z^{-2}} ) |
| B. | (0.15 frac{1+z^{-2}}{1-0.7z^{-2}} ) |
| C. | (0.15 frac{1-z^{-2}}{1-0.7z^{-2}} ) |
| D. | (0.15 frac{1+z^{-2}}{1+0.7z^{-2}} ) |
| Answer» B. (0.15 frac{1+z^{-2}}{1-0.7z^{-2}} ) | |
| 7. |
A two pole low pass filter has a system function H(z)= ( frac{b_0}{(1-pz^{-1})^2} ), What is the value of b0 such that the frequency response H( ) satisfies the condition |H( /4)|2=1/2 and H(0)=1? |
| A. | 0.36 |
| B. | 0.38 |
| C. | 0.32 |
| D. | 0.46 |
| Answer» E. | |
| 8. |
A two pole low pass filter has a system function H(z)= ( frac{b_0}{(1-pz^{-1})^2} ), What is the value of p such that the frequency response H( ) satisfies the condition |H( /4)|2=1/2 and H(0)=1? |
| A. | 0.46 |
| B. | 0.38 |
| C. | 0.32 |
| D. | 0.36 |
| Answer» D. 0.36 | |
| 9. |
If the phase ( ) of the system is linear, then the group delay of the system? |
| A. | Increases with frequency of signal |
| B. | Constant |
| C. | Decreases with frequency of signal |
| D. | Independent of frequency of signal |
| Answer» C. Decreases with frequency of signal | |
| 10. |
The Envelope delay or Group delay is the time delay that the signal component of frequency undergoes as it passes from the input to the output of the system. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
An ideal filter should have unity gain in their stop band. |
| A. | True |
| B. | False |
| Answer» C. | |