**Digital Signal Processing** **MCQ Set 1:- **Questions and answers are much important for any interviews of Digital Signal processing. Join Our Telegram Channel For pdf download.

**Q1.If x(n) and X(k) are an N-point DFT pair, then X(k+N)=?**

- X(-k)
- -X(k)
- X(k)
- -X(-k)

**Ans:- C : X(k)**

**Q2. DFT is applied to**

- Infinite sequences
- Finite discrete sequences
- Continuous infinite signals
- Continuous finite sequences

**Ans:- Finite discrete sequences**

**NPTEL ALL WEEK ASSIGNMENT ANSWERS:-**

**Soft Skill Assignment****Answers****Project Management For Managers****Answer****Semiconducter Devices And Circuit Answer****Problem Solving Through Programming In C Answer**

**Q3. The Elliptic filters have**

- Flat pass band and Equiripple stop band
- Flat stop band and Equiripple pass band
- Flat stop band and Flat pass band
- Equiripple pass band and Equiripple stop band

**Ans:- Equiripple passband and Equiripple stopband**

**Q4. In Digital Active cross Preamplifier is used after**

- Source
- Digital Active crossover
- Amplification
- Output

**Ans:- Source**

**Q5. An analog LTI system with system function H(s) is stable**

- If all its poles lie in the left half of the S Plane
- If all its zeros lie in the right half of the S Plane
- If all its poles lie in the right half of the S Plane
- If all its zeros lie in the left half of the S Plane

**Ans:- If all its poles lie in the left half of the S Plane**

**Q6. Role of the Anti-aliasing filter is to remove**

- low frequency
- high frequency
- medium frequency
- All frequency

**Ans:- high frequency**

**Q7. Impulse Response of an IIR filter is**

- Finite duration
- Infinite duration
- Limited to the fundamental period
- Equal to system function

**Ans:- Infinite duration**

**Q8. A vocoder consists of**

- Only Encoder
- Only decoder
- Both encoder and decoder
- Encrypt and Decrypt

**Ans:- Both encoder and decoder**

**Q9. In Overlap add method, what is the length of each input data block?**

- L-1
- L
- L+1
- L+2

**Ans:- L**

**Q10.The circular convolution of two sequences in time domain isequivalent to**

- Multiplication of DFTs of two sequences
- Summation of DFTs of two sequences
- Difference of DFTs of two sequences
- Square of multiplication of DFTs of two sequences

**Ans:- Multiplication of DFTs of two sequences**

**Q11. The IIR Filter designing process involves**

- Designing of digital filter in analog domain and tranforming into digital domain
- Designing of digital filter in digital domain and tranforming into analog domain
- Designing of analog filter in analog domain and tranforming into digital domain
- Designing the Digital filter directly with no conversions

**Ans:- Designing of digital filter in analog domain and tranforming into digital domain**

**Q12. Which of the following is true in case of Overlap add method?**

- M zeros are appended at last of each data block
- M zeros are appended at first of each data block
- M-1 zeros are appended at last of each data block
- M-1 zeros are appended at first of each data block

**Ans:- M-1 zeros are appended at last of each data block **

**Q13. Consider the assertions given below. Which among them is an advantage of FIR Filter?**

- Necessity of computational techniques for filter implementation
- Presence of linear phase response
- Requirement of large storage
- Incapability of simulating prototype analog filters

**Ans:- Presence of linear phase response **

**Q14. If all the poles of H(z) are outside the unit circle, then the system is said to be**

- Only causal
- Only BIBO stable
- BIBO stable and causal
- BIBO Unstable

**Ans:- BIBO Unstable **

**Q15. Which frequency is calculated in Vibration Analysis for Defective Gear Teeth**

- Low frequency
- Meshing Frequency
- High Frequency
- Medium frequency

**Ans:- Meshing Frequency **

**Q16. Volume control can be done digitally at**

- Source
- Digital cross over
- Source and Digital cross over
- Speaker

**Ans:- Digital cross over **

**Q17. Which one of the structures is NOT used for realisation of a digital IIR filter?**

- Direct Form 1&2
- Lattice Form
- Cascade Form
- Parallel Form

**Ans:- Lattice Form**

**Q18. ECG signal is corrupted with**

- Channel Noise
- Contact Noise
- Channel Noise and Contact Noise
- Interference Noise

**Ans:- Channel Noise and Contact Noise **

**Q19. Power line interference in ECG introduces frequency components of**

- 50 Hz to 60Hz
- 60Hz to 70Hz
- 10 Hz to 20Hz
- 20Hz to 40Hz

**Ans:- 50 Hz to 60Hz **

**Q20. Frequency Discriminator in Voice encoders are used before**

- LPF
- HPF
- ADC & Mux
- DAC

**Ans:- ADC & Mux **

**Q21. If all the poles of H(z) are inside the unit circle, then the system is said to be**

- Only causal
- BIBO stable and causal
- BIBO causal
- Only BIBO stable

**Ans:- BIBO stable and causal **

**See More**:- Digital Signal Processing Important MCQ Set 2 (DSP)

**Digital Signal Processing** **MCQ Set 1:- **Questions and answers are much important for any interviews of Digital Signal processing. Join Our Telegram Channel For pdf download.

**NPTEL ALL WEEK ASSIGNMENT ANSWERS:-**