Explore topic-wise MCQs in Digital Signal Processing.

This section includes 8 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.

Is the system with impulse response h(n)=2nu(n-1) stable.

A. True
B. False
Answer» C.
Discussion
2.

x(n)* (n-n0)=?

A. x(n+n<sub>0</sub>)
B. x(n-n<sub>0</sub>)
C. x(-n-n<sub>0</sub>)
D. x(-n+n<sub>0</sub>)
Answer» C. x(-n-n<sub>0</sub>)
Discussion
3.

An LTI system is said to be causal if and only if?

A. Impulse response is non-zero for positive values of n
B. Impulse response is zero for positive values of n
C. Impulse response is non-zero for negative values of n
D. Impulse response is zero for negative values of n
Answer» E.
Discussion
4.

x(n)*[h1(n)+h2(n)]=x(n)*h1(n)+x(n)*h2(n).

A. True
B. False
Answer» B. False
Discussion
5.

Determine the impulse response for the cascade of two LTI systems having impulse responses h1(n)= (( frac{1}{2})^2 ) u(n) and h2(n)= (( frac{1}{4})^2 ) u(n).

A. (( frac{1}{2})^n[2-( frac{1}{2})^n] ), n&lt;0
B. (( frac{1}{2})^n[2-( frac{1}{2})^n] ), n&gt;0
C. (( frac{1}{2})^n[2+( frac{1}{2})^n] ), n&lt;0
D. (( frac{1}{2})^n[2+( frac{1}{2})^n] ), n&gt;0
Answer» C. (( frac{1}{2})^n[2+( frac{1}{2})^n] ), n&lt;0
Discussion
6.

x(n)*(h1(n)*h2(n))=(x(n)*h1(n))*h2(n).

A. True
B. False
Answer» B. False
Discussion
7.

Determine the output y(n) of a LTI system with impulse response h(n)=anu(n), |a|&lt;1with the input sequence x(n)=u(n).

A. ( frac{1-a^{n+1}}{1-a} )
B. ( frac{1-a^{n-1}}{1-a} )
C. ( frac{1+a^{n+1}}{1+a} )
D. None of the mentioned
Answer» B. ( frac{1-a^{n-1}}{1-a} )
Discussion
8.

The formula y(n)= ( sum_{k=- infty}^{ infty}x(k)h(n-k) ) that gives the response y(n) of the LTI system as the function of the input signal x(n) and the unit sample response h(n) is known as ______________

A. Convolution sum
B. Convolution product
C. Convolution Difference
D. None of the mentioned
Answer» B. Convolution product
Discussion