Digital Signal Processing Questions and Answers
Q1.
If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be ______
Answer :
None of the mentioned
Q2.
The system described by the input-output equations y(n)=x2(n) is a Non-linear system.
Answer :
True
Q3.
The discrete time function defined as u(n)=n for n≥0;u(n)=0 for n<0 is an _______
Answer :
Unit ramp signal
Q4.
An LTI system is said to be causal if and only if?
Answer :
Impulse response is zero for negative values of n
Q5.
The system described by the equation y(n)=ay(n-1)+b x(n) is a recursive system.
Answer :
True
Q6.
Which property does y(t)=x(1-t) exhibit?
Answer :
Time shifting and reflecting
Q7.
What is the physical device that performs an operation on the signal?
Answer :
System
Q8.
Which of the following should be done in order to convert a continuous-time signal to a discrete-time signal?
Answer :
Sampling
Q9.
The quality of output signal from A/D converter is measured in terms of _____
Answer :
Signal to quantization noise ratio
Q10.
If the ROC of the system function is the exterior of a circle of radius r < ∞, including the point z = ∞, then the system is said to be _____
Answer :
Causal
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