MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
The frequency ωP is called as ______________ |
| A. | Pass band ripple |
| B. | Stop band ripple |
| C. | Pass band edge ripple |
| D. | Stop band edge ripple |
| Answer» D. Stop band edge ripple | |
| 2. |
The magnitude |H(ω)| cannot be constant in any finite range of frequencies and the transition from pass-band to stop-band cannot be infinitely sharp. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The HI(ω) is uniquely determined from HR(ω) through the integral relationship. This integral is called as Continuous Hilbert transform. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
What is the Fourier transform of the unit step function U(ω)? |
| A. | πδ(ω)-0.5-j0.5cot(ω/2) |
| B. | πδ(ω)-0.5+j0.5cot(ω/2) |
| C. | πδ(ω)+0.5+j0.5cot(ω/2) |
| D. | πδ(ω)+0.5-j0.5cot(ω/2) |
| Answer» E. | |
| 5. |
HR(ω) and HI(ω) are interdependent and cannot be specified independently when the system is causal. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
If h(n) is absolutely summable, i.e., BIBO stable, then the equation for the frequency response H(ω) is given as? |
| A. | HI(ω)-j HR(ω) |
| B. | HR(ω)-j HI(ω) |
| C. | HR(ω)+j HI(ω) |
| D. | HI(ω)+j HR(ω) |
| Answer» D. HI(ω)+j HR(ω) | |
| 7. |
If h(n) is causal and h(n)=he(n)+ho(n),then what is the expression for h(n) in terms of only ho(n)? |
| A. | h(n)=2ho(n)u(n)+h(0)δ(n), n ≥ 0 |
| B. | h(n)=2ho(n)u(n)+h(0)δ(n), n ≥ 1 |
| C. | h(n)=2ho(n)u(n)-h(0)δ(n), n ≥ 1 |
| D. | h(n)=2ho(n)u(n)-h(0)δ(n), n ≥ 0 |
| Answer» C. h(n)=2ho(n)u(n)-h(0)δ(n), n ≥ 1 | |
| 8. |
If h(n) is causal and h(n)=he(n)+ho(n),then what is the expression for h(n) in terms of only he(n)? |
| A. | h(n)=2he(n)u(n)+he(0)δ(n), n ≥ 0 |
| B. | h(n)=2he(n)u(n)+he(0)δ(n), n ≥ 1 |
| C. | h(n)=2he(n)u(n)-he(0)δ(n), n ≥ 1 |
| D. | h(n)=2he(n)u(n)-he(0)δ(n), n ≥ 0 |
| Answer» E. | |
| 9. |
The magnitude function |H(ω)| can be zero at some frequencies, but it cannot be zero over any finite band of frequencies. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
If |H(ω)| is square integrable and if the integral \(\int_{-\pi}^\pi |ln|H(ω)||dω\) is finite, then the filter with the frequency response H(ω)=|H(ω)|ejθ(ω) is? |
| A. | Anti-causal |
| B. | Constant |
| C. | Causal |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 11. |
If h(n) has finite energy and h(n)=0 for n<0, then which of the following are true? |
| A. | \(\int_{-π}^π|ln |H(ω)||dω \gt -\infty\) |
| B. | \(\int_{-π}^π|ln |H(ω)||dω \lt \infty\) |
| C. | \(\int_{-π}^π|ln|H(ω)||dω = \infty\) |
| D. | None of the mentioned |
| Answer» C. \(\int_{-π}^π|ln|H(ω)||dω = \infty\) | |
| 12. |
The following diagram represents the unit sample response of which of the following filters? |
| A. | Ideal high pass filter |
| B. | Ideal low pass filter |
| C. | Ideal high pass filter at ω=π/4 |
| D. | Ideal low pass filter at ω=π/4 |
| Answer» E. | |