MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Signals & Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a stable system which of the following is correct? |
| A. | |z| < 1 |
| B. | |z| = 1 |
| C. | |z| > 1 |
| D. | |z| 1 |
| Answer» B. |z| = 1 | |
| 2. |
The CDF for a certain random variable is given as F(x) = {0, - <x 0; kx2, 0<x 10; 100k, 10<x< ;} The value of k is __________ |
| A. | 100 |
| B. | 50 |
| C. | 1/50 |
| D. | 1/100 |
| Answer» E. | |
| 3. |
A current I given by I = 8 + 6 ( sqrt{2} ) (sin ( t + 30 )) A is passed through three meters. The respective readings (in ampere) will be? |
| A. | 8, 6 and 10 |
| B. | 8, 6 and 8 |
| C. | 8, 10 and 10 |
| D. | -8, 2 and 2 |
| Answer» D. -8, 2 and 2 | |
| 4. |
The spectral density of white noise is ____________ |
| A. | Exponential |
| B. | Uniform |
| C. | Poisson |
| D. | Gaussian |
| Answer» C. Poisson | |
| 5. |
The system x(k) = 7( ( frac{1}{3} ))k u(-k-1)-6( ( frac{1}{2} ))k u(k) is ___________ |
| A. | Causal |
| B. | Anti-causal |
| C. | Non-causal |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 6. |
The area under Gaussian pulse ( int_{- }^ e^{{- }^{{t}^2}} ,dt ) is ___________ |
| A. | Unity |
| B. | Infinity |
| C. | Pulse |
| D. | Zero |
| Answer» B. Infinity | |
| 7. |
The value of z{[k-1] u(k)} is _______________ |
| A. | ( frac{z(z+2)}{(z-1)^2} ) |
| B. | ( frac{2z-z^2}{(z-1)^2} ) |
| C. | ( frac{z^2}{(z-1)^2} ) |
| D. | ( frac{z(z-2)}{(z+1)^2} ) |
| Answer» C. ( frac{z^2}{(z-1)^2} ) | |
| 8. |
X1(z) = 2z + 1 + z-1 and X2(z) = z + 1 + 2z-1 is ________________ |
| A. | Even signal |
| B. | Odd signal |
| C. | In time power signal |
| D. | In time energy signal |
| Answer» E. | |
| 9. |
Given 2 signals (-3)k u(k) and u (k-1). These two signals are superimposed. This superimposed signal is _______________ |
| A. | ( frac{z}{z+3} + frac{1}{z-1} ) |
| B. | ( frac{z}{z+3} frac{1}{z-1} ) |
| C. | ( frac{z}{z-3} + frac{1}{z-1} ) |
| D. | ( frac{z}{z+3} + frac{1}{z+1} ) |
| Answer» B. ( frac{z}{z+3} frac{1}{z-1} ) | |
| 10. |
If a system has N different poles, then the system can have ______________ |
| A. | N ROC s |
| B. | (N-1) ROC s |
| C. | (N+1) ROC s |
| D. | 2N ROC s |
| Answer» D. 2N ROC s | |
| 11. |
The value of z(ak u[-k]) is _______________ |
| A. | ( frac{z}{z-a} ) |
| B. | ( frac{z}{a-z} ) |
| C. | ( frac{z^2}{z-a} ) |
| D. | ( frac{a}{a-z} ) |
| Answer» C. ( frac{z^2}{z-a} ) | |
| 12. |
The z-transform of u(-n-1) is ___________ |
| A. | ( frac{1}{1-z} ) |
| B. | ( frac{z}{1-z} ) |
| C. | ( frac{1}{1-z^{-1}} ) |
| D. | ( frac{z}{1-z^{-1}} ) |
| Answer» D. ( frac{z}{1-z^{-1}} ) | |
| 13. |
If H(f) = ( frac{y(t)}{x(t)} ), then for this to be true x(t) is ___________ |
| A. | exp (( frac{j2nf}{t}) ) |
| B. | exp ((- frac{j2nf}{t}) ) |
| C. | exp(j2nft) |
| D. | exp(-j2nft) |
| Answer» D. exp(-j2nft) | |
| 14. |
Given a system function H(s) = ( frac{1}{s+3} ). Let us consider a signal sin 2t. Then the steady state response is ___________ |
| A. | ( frac{1}{8} ) |
| B. | Infinite |
| C. | 0 |
| D. | 8 |
| Answer» D. 8 | |