MCQOPTIONS
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MCQOPTIONS
This section includes 19 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. |
A causal system produces the output sequence y(n)={1,0.7} when excited by the input sequence x(n)={1,-0.7,0.1}, then what is the impulse response of the system function? |
| A. | [3(0.5)n+4(0.2)n]u(n) |
| B. | [4(0.5)n-3(0.2)n]u(n) |
| C. | [4(0.5)n+3(0.2)n]u(n) |
| D. | None of the mentioned |
| Answer» C. [4(0.5)n+3(0.2)n]u(n) | |
| 2. |
An IIR system with system function H(z)=\(\frac{B(z)}{A(z)}\) is called a mixed phase if ___________ |
| A. | All poles and zeros are inside the unit circle |
| B. | All zeros are outside the unit circle |
| C. | All poles are outside the unit circle |
| D. | Some, but not all of the zeros are outside the unit circle |
| Answer» E. | |
| 3. |
An IIR system with system function H(z)=\(\frac{B(z)}{A(z)}\) is called a minimum phase if ___________ |
| A. | All poles and zeros are inside the unit circle |
| B. | All zeros are outside the unit circle |
| C. | All poles are outside the unit circle |
| D. | All poles and zeros are outside the unit circle |
| Answer» B. All zeros are outside the unit circle | |
| 4. |
If the frequency response of an FIR system is given as H(z)=1-5/2z-1-3/2z-2, then the system is ___________ |
| A. | Minimum phase |
| B. | Maximum phase |
| C. | Mixed phase |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
If the frequency response of an FIR system is given as H(z)=1-z-1-6z-2, then the system is ___________ |
| A. | Minimum phase |
| B. | Maximum phase |
| C. | Mixed phase |
| D. | None of the mentioned |
| Answer» C. Mixed phase | |
| 6. |
If the frequency response of an FIR system is given as H(z)=6+z-1-z-2, then the system is ___________ |
| A. | Minimum phase |
| B. | Maximum phase |
| C. | Mixed phase |
| D. | None of the mentioned |
| Answer» B. Maximum phase | |
| 7. |
What is the causal inverse of the FIR system with impulse response h(n)=δ(n)-aδ(n-1)? |
| A. | δ(n)-aδ(n-1) |
| B. | δ(n)+aδ(n-1) |
| C. | a-n |
| D. | an |
| Answer» E. | |
| 8. |
What is the inverse of the system with impulse response h(n)=δ(n)-1/2δ(n-1)? |
| A. | (1/2)nu(n) |
| B. | -(1/2)nu(-n-1) |
| C. | (1/2)nu(n) & -(1/2)nu(-n-1) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 9. |
If a system is said to be invertible, then? |
| A. | One-to-one correspondence between its input and output signals |
| B. | One-to-many correspondence between its input and output signals |
| C. | Many-to-one correspondence between its input and output signals |
| D. | None of the mentioned |
| Answer» B. One-to-many correspondence between its input and output signals | |
| 10. |
AN_IIR_SYSTEM_WITH_SYSTEM_FUNCTION_H(Z)=(B(Z))/(A(Z))_IS_CALLED_A_MIXED_PHASE_IF:?$ |
| A. | All poles and zeros are inside the unit circle |
| B. | All zeros are outside the unit circle |
| C. | All poles are outside the unit circle |
| D. | Some, but not all of the zeros are outside the unit circle |
| Answer» E. | |
| 11. |
A causal system produces the output sequence y(n)={1,0.7} when excited by the input sequence x(n)={1,-0.7,0.1}, then what is the impulse response of the system function?$ |
| A. | [3(0.5)<sup>n</sup>+4(0.2)<sup>n</sup>]u(n) |
| B. | [4(0.5)<sup>n</sup>-3(0.2)<sup>n</sup>]u(n) |
| C. | [4(0.5)<sup>n</sup>+3(0.2)<sup>n</sup>]u(n) |
| D. | None of the mentioned |
| Answer» C. [4(0.5)<sup>n</sup>+3(0.2)<sup>n</sup>]u(n) | |
| 12. |
An IIR system with system function H(z)=(B(z))/(A(z)) is called a minimum phase if? |
| A. | All poles and zeros are inside the unit circle |
| B. | All zeros are outside the unit circle |
| C. | All poles are outside the unit circle |
| D. | All poles and zeros are outside the unit circle |
| Answer» B. All zeros are outside the unit circle | |
| 13. |
If the frequency response of an FIR system is given as H(z)=1-5/2z-1-3/2z-2, then the system is: |
| A. | Minimum phase |
| B. | Maximum phase |
| C. | Mixed phase |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
If the frequency response of an FIR system is given as H(z)=6+z-1-z-2, then the system is: |
| A. | Minimum phase |
| B. | Maximum phase |
| C. | Mixed phase |
| D. | None of the mentioned |
| Answer» B. Maximum phase | |
| 15. |
What is the causal inverse of the FIR system with impulse response h(n)=δ(n)-aδ(n-1)?$ |
| A. | δ(n)-aδ(n-1) |
| B. | δ(n)+aδ(n-1) |
| C. | a -n |
| D. | an |
| Answer» E. | |
| 16. |
What is the inverse of the system with impulse response h(n)= δ(n)-1/2 δ(n-1)?$ |
| A. | (1/2)<sup>n</sup>u(n) |
| B. | -(1/2)<sup>n</sup>u(-n-1) |
| C. | (1/2)<sup>n</sup>u(n) & -(1/2)<sup>n</sup>u(-n-1) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 17. |
What is the inverse of the system with impulse response h(n)=(1/2)nu(n)? |
| A. | δ(n)+1/2 δ(n-1) |
| B. | δ(n)-1/2 δ(n-1) |
| C. | δ(n)-1/2 δ(n+1) |
| D. | δ(n)+1/2 δ(n+1) |
| Answer» C. ‚âà√≠¬¨‚Ä¢(n)-1/2 ‚âà√≠¬¨‚Ä¢(n+1) | |
| 18. |
If h(n) is the impulse response of an LTI system T and h1(n) is the impulse response of the inverse system T-1, then which of the following is true? |
| A. | [h(n)*h1(n)].x(n)=x(n) |
| B. | [h(n).h1(n)].x(n)=x(n) |
| C. | [h(n)*h1(n)]*x(n)=x(n) |
| D. | [h(n).h1(n)]*x(n)=x(n) |
| Answer» D. [h(n).h1(n)]*x(n)=x(n) | |
| 19. |
If a system is said to be invertible, then: |
| A. | One-to-one correspondence between its input and output signals |
| B. | One-to-many correspondence between its input and output signals |
| C. | Many-to-one correspondence between its input and output signals |
| D. | None of the mentioned |
| Answer» B. One-to-many correspondence between its input and output signals | |