MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
Which of the following electromagnetic signals has a frequency range of 30kHz-3MHz? |
| A. | Radio broadcast |
| B. | Shortwave radio signal |
| C. | RADAR |
| D. | Infrared signal |
| Answer» B. Shortwave radio signal | |
| 2. |
If F1 and F2 are the lower and upper cutoff frequencies of a band pass signal, then what is the condition to be satisfied to call such a band pass signal as narrow band signal? |
| A. | (F<sub>1</sub>-F<sub>2</sub>)> ( frac{F_1+F_2}{2} )(factor of 3 or less) |
| B. | (F<sub>1</sub>-F<sub>2</sub>) ( frac{F_1+F_2}{2} )(factor of 10 or more) |
| C. | (F<sub>1</sub>-F<sub>2</sub>)< ( frac{F_1+F_2}{2} )(factor of 3 or less) |
| D. | (F<sub>1</sub>-F<sub>2</sub>) ( frac{F_1+F_2}{2} )(factor of 10 or more) |
| Answer» E. | |
| 3. |
The term bandwidth represents the quantitative measure of a signal. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
If a power signal has its power density spectrum concentrated about zero frequency, the signal is known as ______________ |
| A. | Low frequency signal |
| B. | Middle frequency signal |
| C. | High frequency signal |
| D. | None of the mentioned |
| Answer» B. Middle frequency signal | |
| 5. |
What is the Fourier transform of the signal x(n)=u(n)? |
| A. | ( frac{1}{2sin u2061( /2)} e^{j( + )} ) |
| B. | ( frac{1}{2sin u2061( /2)} e^{j( - )} ) |
| C. | ( frac{1}{2sin u2061( /2)} e^{j( + )/2} ) |
| D. | ( frac{1}{2sin u2061( /2)} e^{j( - )/2} ) |
| Answer» E. | |
| 6. |
If cx(n) is the complex cepstrum sequence obtained from the inverse Fourier transform of ln X( ), then what is the expression for c (n)? |
| A. | ( frac{1}{2 } int_0^ theta( ) e^{j n} d ) |
| B. | ( frac{1}{2 } int_{- }^ theta( ) e^{-j n} d ) |
| C. | ( frac{1}{2 } int_0^ theta( ) e^{j n} d ) |
| D. | ( frac{1}{2 } int_{- }^ theta( ) e^{j n} d ) |
| Answer» E. | |
| 7. |
If x(n) is a stable sequence so that X(z) converges on to a unit circle, then the complex cepstrum signal is defined as ____________ |
| A. | X(ln X(z)) |
| B. | ln X(z) |
| C. | X<sup>-1</sup>(ln X(z)) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
The sequence x(n)= ( frac{sin _c n}{ n} ) does not have both z-transform and Fourier transform. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
What is the Fourier transform of the signal x(n) which is defined as shown in the graph below? |
| A. | Ae<sup>-j( /2)(L)</sup> ( frac{sin u2061( frac{ L}{2})}{sin u2061( frac{ }{2})} ) |
| B. | Ae<sup>j( /2)(L-1)</sup> ( frac{sin u2061( frac{ L}{2})}{sin u2061( frac{ }{2})} ) |
| C. | Ae<sup>-j( /2)(L-1)</sup> ( frac{sin u2061( frac{ L}{2})}{sin u2061( frac{ }{2})} ) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
What is the energy density spectrum Sxx( ) of the signal x(n)=anu(n), |a|<1? |
| A. | ( frac{1}{1+2acos +a^2} ) |
| B. | ( frac{1}{1+2asin +a^2} ) |
| C. | ( frac{1}{1-2asin +a^2} ) |
| D. | ( frac{1}{1-2acos +a^2} ) |
| Answer» E. | |
| 11. |
For a signal x(n) to exhibit even symmetry, it should satisfy the condition |X(- )|=| X( )|. |
| A. | True |
| B. | False |
| Answer» B. False | |