Digital Signal Processing Assignment Questions | Digital Signal Processing MCQs

Questions

1 The impulse response of a LTI system is h(n)={1,1,1}. What is the response of the signal to the input x(n)={1,2,3}?

A {1,3,6,3,1}

B {1,2,3,2,1}

C {1,3,6,5,3}

D {1,1,1,0,0}

View Answer

Answer:{1,3,6,5,3}

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

A True

B False

View Answer

Answer:True

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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

View Answer

Answer:Impulse response is zero for negative values of n

4 x(n)*δ(n-n₀)=?

A x(n+n₀)

B x(n-n₀)

C x(-n-n₀)

D x(-n+n₀)

View Answer

Answer:x(n-n₀)

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

A True

B False

View Answer

Answer:False

6 If x(n) is a discrete-time signal, then the value of x(n) at non integer value of ‘n’ is?

A Zero

B Positive

C Negative

D Not defined

View Answer

Answer:Not defined

7 The discrete time function defined as u(n)=n for n≥0;u(n)=0 for n<0 is an _____________

A Unit sample signal

B Unit step signal

C Unit ramp signal

D None of the mentioned

View Answer

Answer:Unit ramp signal

8 The phase function of a discrete time signal x(n)=aⁿ, where a=r.e^jθ is?

A tan(nθ)

B nθ

C tan-1(nθ)

D none of the mentioned

View Answer

Answer:nθ

9 x(n)*δ(n-k)=?

A x(n)

B x(k)

C x(k)*δ(n-k)

D x(k)*δ(k)

View Answer

Answer:x(k)*δ(n-k)

10 A real valued signal x(n) is called as anti-symmetric if ___________

A x(n)=x(-n)

B x(n)=-x(-n)

C x(n)=-x(n)

D none of the mentioned

View Answer

Answer:x(n)=-x(-n)

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