MCQOPTIONS
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MCQOPTIONS
This section includes 21 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. |
What is the condition for a signal x(n)=Brn where r=eαT to be called as an decaying exponential signal? |
| A. | 0<r<∞ |
| B. | 0<r<1 |
| C. | r>1 |
| D. | r<0 |
| Answer» C. r>1 | |
| 2. |
If x(n) is a discrete-time signal, then the value of x(n) at non integer value of 'n' is: |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | Not defined |
| Answer» E. | |
| 3. |
The phase function of a discrete time signal x(n)=an, where a=r.ejθ is: |
| A. | tan(nθ) |
| B. | nθ |
| C. | tan-1(nθ) |
| D. | None of the mentioned |
| Answer» C. tan-1(nθ) | |
| 4. |
x(n)*[h1(n)+h2(n)]=x(n)*h1(n)+x(n)*h2(n) |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The system described by the input-output equations y(n)=x(-n) is a causal system. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
The output signal when a signal x(n)=(0,1,2,3) is processed through an 'Delay' system is: |
| A. | (3,2,1,0) |
| B. | (1,2,3,0) |
| C. | (0,1,2,3) |
| D. | None of the mentioned |
| Answer» C. (0,1,2,3) | |
| 7. |
An LTI system is said to be causal if and only if |
| A. | Impulse response is non-zero for positive values of n |
| B. | Impulse response is zero for positive values of n |
| C. | Impulse response is non-zero for negative values of n |
| D. | Impulse response is zero for negative values of n |
| Answer» E. | |
| 8. |
The system described by the input-output equations y(n)=x2(n) is a Non-linear system. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
The discrete time function defined as u(n)=n for n≥0;=0 for n<0 is an: |
| A. | Unit sample signal |
| B. | Unit step signal |
| C. | Unit ramp signal |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
The function given by the equation x(n)=1, for n=0;=0, for n≠0 is a: |
| A. | Step function |
| B. | Ramp function |
| C. | Triangular function |
| D. | Impulse function |
| Answer» E. | |
| 11. |
Determine the impulse response for the cascade of two LTI systems having impulse responses h1(n)=(1/2)2 u(n) and h2(n)= (1/4)2 u(n). |
| A. | (1/2)n[2-(1/2)n], n<0 |
| B. | (1/2)n[2-(1/2)n], n>0 |
| C. | (1/2)n[2+(1/2)n], n<0 |
| D. | (1/2)n[2+(1/2)n], n>0 |
| Answer» C. (1/2)n[2+(1/2)n], n<0 | |
| 12. |
What is the order of the four operations that are needed to be done on h(k) in order to convolute x(k) and h(k)? Step-1:Folding Step-2:Multiplicaton with x(k) Step-3:Shifting Step-4:Summation |
| A. | 1-2-3-4 |
| B. | 1-2-4-3 |
| C. | 2-1-3-4 |
| D. | 1-3-2-4 |
| Answer» E. | |
| 13. |
The output signal when a signal x(n)=(0,1,2,3) is processed through an 'Identical' system is: |
| A. | (3,2,1,0) |
| B. | (1,2,3,0) |
| C. | (0,1,2,3) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
x(n)*δ(n-k)=? |
| A. | x(n) |
| B. | x(k) |
| C. | x(k)*δ(n-k) |
| D. | x(k)*δ(k) |
| Answer» D. x(k)*δ(k) | |
| 15. |
If the output of the system of the system at any 'n' depends only the present or the past values of the inputs then the system is said to be: |
| A. | Linear |
| B. | Non-Linear |
| C. | Causal |
| D. | Non-causal |
| Answer» D. Non-causal | |
| 16. |
Is the system with impulse response h(n)=2nu(n-1) stable? |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
x(n)*δ(n-n0)= |
| A. | x(n+n0) |
| B. | x(n-n0) |
| C. | x(-n-n0) |
| D. | x(-n+n0) |
| Answer» C. x(-n-n0) | |
| 18. |
Determine the output y(n) of a LTI system with impulse response h(n)=anu(n),|a|<1with the input sequence x(n)=u(n). |
| A. | (1-a(n+1))/(1-a) |
| B. | (1-a(n-1))/(1-a)c) (1+a(n+1))/(1+a)d) None of the mentioned |
| Answer» B. (1-a(n-1))/(1-a)c) (1+a(n+1))/(1+a)d) None of the mentioned | |
| 19. |
The system described by the input-output equation y(n)=nx(n)+bx3(n) is a: |
| A. | Static system |
| B. | Dynamic system |
| C. | Identical system |
| D. | None of the mentioned |
| Answer» B. Dynamic system | |
| 20. |
Time scaling operation is also known as: |
| A. | Down-sampling |
| B. | Up-sampling |
| C. | Sampling |
| D. | None of the mentioned |
| Answer» B. Up-sampling | |
| 21. |
If a system do not have a bounded output for bounded input, then the system is said to be: |
| A. | Causal |
| B. | Non-causal |
| C. | Stable |
| D. | Non-stable |
| Answer» E. | |