MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Signal Processing Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A linear time invariant system is characterized by the system function H(z)=\(\frac{1}{1-0.5z^{-1}}+\frac{2}{1-3z^{-1}}\). What is the h(n) if the system is anti causal? |
| A. | (0.5)nu(n)+2(3)nu(n) |
| B. | (0.5)nu(-n-1)-2(3)nu(-n-1) |
| C. | -[(0.5)n+2(3)n]u(-n-1) |
| D. | (0.5)nu(n)-2(3)nu(-n-1) |
| Answer» D. (0.5)nu(n)-2(3)nu(-n-1) | |
| 2. |
A linear time invariant system is characterized by the system function H(z)=\(\frac{1}{1-0.5z^{-1}}+\frac{2}{1-3z^{-1}}\). What is the ROC of H(z) if the system is causal? |
| A. | |z|<3 |
| B. | |z|>3 |
| C. | |z|<0.5 |
| D. | |z|>0.5 |
| Answer» C. |z|<0.5 | |
| 3. |
A linear time invariant system is characterized by the system function H(z)=\(\frac{1}{1-0.5z^{-1}}+\frac{2}{1-3z^{-1}}\). What is the h(n) if the system is stable? |
| A. | (0.5)nu(n)-2(3)nu(n) |
| B. | (0.5)nu(-n-1)-2(3)nu(-n-1) |
| C. | (0.5)nu(-n-1)-2(3)nu(n) |
| D. | (0.5)nu(n)-2(3)nu(-n-1) |
| Answer» E. | |
| 4. |
If the ROC of the system function is the exterior of a circle of radius r < ∞, including the point z = ∞, then the system is said to be ___________ |
| A. | Stable |
| B. | Causal |
| C. | Anti causal |
| D. | None of the mentioned |
| Answer» C. Anti causal | |
| 5. |
What is the unit step response of the system described by the difference equation? |
| A. | y(n)=0.9y(n-1)-0.81y(n-2)+x(n) under the initial conditions y(-1)=y(-2)=0? |
| B. | [1.099+1.088(0.9)n.\(cos(\frac{\pi}{3} n+5.2^o)\)]u(n) |
| C. | [1.099+1.088(0.9)n.\(cos(\frac{\pi}{3} n-5.2^o)\)]u(n) |
| D. | [1.099+1.088(0.9)n.\(cos(\frac{\pi}{3} n-5.2^o)\)] |
| E. | None of the mentioned |
| Answer» C. [1.099+1.088(0.9)n.\(cos(\frac{\pi}{3} n-5.2^o)\)]u(n) | |