### Digital Signal Processing(DSP) Viva Questions:

**DIGITAL SIGNAL PROCESSING(DSP) VIVA QUESTIONS:**

- What is sampling theorem?
- What do you mean by process of reconstruction.
- What are techniques of reconstructions.
- What do you mean Aliasing? What is the condition to avoid aliasing for sampling?
- Write the conditions of sampling.
- How many types of sampling there?
- Explain the statement-

**t= 0:0.000005:0.05**

- In the above example what does colon (:) and semicolon (;) denotes.
- What is a) Undersampling b) nyquist plot c) Oversampling.
- Write the MATLAB program for Oversampling.
- What is the use of command ‘legend’?
- Write the difference between built in function, plot and stem describe the function.
- What is the function of built in function and subplot?
- What is linear convolution?
- Explain how convolution syntax built in function works.
- How to calculate the beginning and end of the sequence for the two sided controlled output?
- What is the total output length of linear convolution sum.
- What is an LTI system?
- Describe impulse response of a function.
- What is the difference between convolution and filter?
- Where to use command filter or impz, and what is the difference between these two?
- What is the use o function command ‘deconv’?
- What is the difference between linear and circular convolution?
- What do you mean by statement
**subplot (3,3,1).** - What do you mean by command “mod” and where it is used?
- What do you mean by Autocorrelation and Crosscorrelation sequences?
- What is the difference between Autocorrelatio and Crsscorrelation.
- List all the properties of autocorrelation and Crosscorrelaion sequence.
- Where we use the inbuilt function ‘xcorr’ and what is the purpose of using this function?
- How to calculate output of DFT using MATLAB?
- What do you mean by filtic command, explain.
- How to calculate output length of the linear and circular convolution.
- What do you mean by built in function ‘fliplr’ and where we need to use this.
- What is steady state response?
- Which built in function is used to solve a given difference equation?
- Explain the concept of difference equation.
- Where DFT is used?
- What is the difference between DFT and IDFT?
- What do you mean by built in function ‘abs’ and where it is used?
- What do you mean by phase spectrum and magnitude spectrum/ give comparison.
- How to compute maximum length N for a circular convolution using DFT and IDFT.(what is command).
- Explain the statement-
**y=x1.*x2** - What is FIR and IIR filter define, and distinguish between these two.
- What is filter?
- What is window method? How you will design an FIR filter using window method.
- What are low-pass and band-pass filter and what is the difference between these two?
- Explain the command – N=ceil(6.6*pi/tb)
- Write down commonly used window function characteristics.
- What is the matlab command for Hamming window? Explain.
- What do you mea by cut-off frequency?
- What do you mean by command butter, cheby1?
- Explain the command in detail-
**[N,wc]=buttord(2*fp/fs,2*fstp/fs,rp,As)** - What is CCS? Explain in detail to execute a program using CCS.
- Why do we need of CCS?
- How to execute a program using ‘dsk’ and ‘simulator’?
- Which IC is used in CCS? Explain the dsk, dsp kit.
- What do you mean by noise?
- Explain the program for linear convolution for your given sequence.
- Why we are using command ‘float’ in CCS programs.
- Where we use ‘float’ and where we use ‘int’?
- Explain the command-
**i=(n-k)%N** - Explain the entire CCS program in step by step of execution.

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