MCQOPTIONS
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MCQOPTIONS
This section includes 18 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. |
In the practical A/D converters, if the differences between transition values are not all equal or uniformly changing, then such error is known as ? |
| A. | Scale-factor error |
| B. | Offset error |
| C. | Linearity error |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 2. |
If the signal ẋ(t) can be viewed as the output of the filter with impulse response h(t) = 1/πt , -∞ < t < ∞ when excited by the input signal x(t) then such a filter is called as___ |
| A. | Analytic transformer |
| B. | Hilbert transformer |
| C. | Both Analytic & Hilbert transformer |
| D. | None of the mentioned |
| Answer» C. Both Analytic & Hilbert transformer | |
| 3. |
In the practical A/D converters, if the difference between the values at which the first transition and the last transition occur is not equal to FS - 2LSB, then such error is known as _________ |
| A. | Scale-factor error |
| B. | Offset error |
| C. | Linearity error |
| D. | All of the mentioned |
| Answer» B. Offset error | |
| 4. |
In the equation x(t) = a(t)cos[2πFct+θ(t) ], Which of the following relations between a(t) and x(t), θ(t) and x(t) are true? |
| A. | a(t), θ(t) are called the Phases of x(t) |
| B. | a(t) is the Phase of x(t), θ(t) is called the Envelope of x(t) |
| C. | a(t) is the Envelope of x(t), θ(t) is called the Phase of x(t) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
What is the type of quantizer, if a Zero is assigned a decision level? |
| A. | Midrise type |
| B. | Mid tread type |
| C. | Mistreat type |
| D. | None of the mentioned |
| Answer» B. Mid tread type | |
| 6. |
The noise power σn2 can be reduced by increasing the sampling rate to spread the quantization noise power over a larger frequency band (-Fs/2,Fs/2). |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
In the equation xq(n)=axq(n-1)+ dq(n), if a < 1 then integrator is called? |
| A. | Leaky integrator |
| B. | Ideal integrator |
| C. | Ideal accumulator |
| D. | Both Ideal integrator & accumulator |
| Answer» B. Ideal integrator | |
| 8. |
In DM, By increasing∆, reduces the overload distortion but increases the granular noise, and vice versa |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
In the practical A/D converters, if the first transition may not occur at exactly + 1/2 LSB ,then such kind of error is known as ____________ |
| A. | Scale-factor error |
| B. | Offset error |
| C. | Linearity error |
| D. | All of the mentioned |
| Answer» C. Linearity error | |
| 10. |
The slope-overload distortion is avoided, if which of the following conditions satisfy? |
| A. | Min| dx(t)/d(t) | ≤ ∆/T |
| B. | Max| dx(t)/d(t) | ≤ ∆/T |
| C. | |dx(t)/d(t) | ≤∆/T |
| D. | None of the mentioned |
| Answer» C. |dx(t)/d(t) | ≤∆/T | |
| 11. |
What is the step size or the resolution of an A/D converter? |
| A. | ∆ = (R)/2(b+1) |
| B. | ∆ = (R )/2(b-1) |
| C. | ∆ = (R )/3(b+1) |
| D. | ∆ = (R )/2 |
| Answer» B. ∆ = (R )/2(b-1) | |
| 12. |
What is the fixed range of the quantization error eq(n)? |
| A. | – ∆/6 < eq(n) ≤ ∆/6 |
| B. | – ∆/4 < eq(n) ≤ ∆/4 |
| C. | – ∆/2 <eq(n) ≤ ∆/2 |
| D. | – ∆/16 <eq(n) ≤ ∆/16 |
| Answer» D. – ∆/16 <eq(n) ≤ ∆/16 | |
| 13. |
3. Which low pass signal component occurs at the rate of B samples per second with even numbered samples of x(t)? |
| A. | uc– lowpass signal component |
| B. | us– lowpass signal component |
| C. | uc & us – lowpass signal component |
| D. | None of the mentioned |
| Answer» B. us– lowpass signal component | |
| 14. |
In the equation xq(n)=axq(n-1)+ dq(n), if a = 1 then integrator is called? |
| A. | Leaky integrator |
| B. | Ideal integrator |
| C. | Ideal accumulator |
| D. | Both Ideal integrator & accumulator |
| Answer» E. | |
| 15. |
If the interpolation factor is I = 256, the A /D converter output can be obtained by averaging successive non-overlapping blocks of 128 bits. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
What is the equivalent time -domain expression of X+(F)=2V(F)X(F)? |
| A. | F(+1)2V(F)*F(+1)X(F) |
| B. | F(-1)4V(F)*F(-1)X(F) |
| C. | F(-1)V(F)*F(-1)X(F) |
| D. | F(-1)2V(F)*F(-1)X(F) |
| Answer» E. | |
| 17. |
The crosshatched areas gives two types of Quantization error in DM ,They are ? |
| A. | Slope-overload distortion |
| B. | Granular noise |
| C. | Slope-overload distortion & Granular noise |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 18. |
What is the term used to describe the range of an A/D converter for uni-polar signals? |
| A. | Full scale |
| B. | FSR |
| C. | Full-scale region |
| D. | FSS |
| Answer» B. FSR | |