Digital Signal Processing Interview Questions | Digital Signal Processing MCQs

Questions

1 What is the ROC of a causal infinite length sequence?

A |z|< r1

B |z|> r1

C r2< |z|< r1

D None of the mentioned

View Answer

Answer:|z|> r1

2 Which of the following justifies the linearity property of z-transform?[x(n)↔X(z)].

A x(n)+y(n) ↔ X(z)Y(z)

B x(n)+y(n) ↔ X(z)+Y(z)

C x(n)y(n) ↔ X(z)+Y(z)

D x(n)y(n) ↔ X(z)Y(z)

View Answer

Answer:x(n)+y(n) ↔ X(z)+Y(z)

Article and Schedule Quiz	Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

3 According to Time shifting property of z-transform, if X(z) is the z-transform of x(n) then what is the z-transform of x(n-k)?

A z^kX(z)

B z^-kX(z)

C X(z-k)

D X(z+k)

View Answer

Answer:z^-kX(z)

4 If X(z) is the z-transform of the signal x(n) then what is the z-transform of aⁿx(n)?

A X(az)

B X(az-1)

C X(a-1z)

D None of the mentioned

View Answer

Answer:X(a-1z)

5 If the ROC of X(z) is r₁<|z|<r₂, then what is the ROC of X(a^-1z)?

A |a|r1<|z|<|a|r2

B |a|r1>|z|>|a|r2

C |a|r1<|z|>|a|r2

D |a|r1>|z|<|a|r2

View Answer

Answer:|a|r1<|z|<|a|r2

6 If X(z) is the z-transform of the signal x(n), then what is the z-transform of the signal x(-n)?

A X(-z)

B X(z-1)

C X-1(z)

D None of the mentioned

View Answer

Answer:X(z-1)

7 If Z{x₁(n)}=X₁(z) and Z{x₂(n)}=X₂(z) then Z{x₁(n)*x₂(n)}=?

A X₁(z).X₂(z)

B X₁(z)+X₂(z)

C X₁(z)*X₂(z)

D None of the mentioned

View Answer

Answer:X₁(z).X₂(z)

8 What is the convolution x(n) of the signals x₁(n)={1,-2,1} and x₂(n)={1,1,1,1,1,1}?

A {1,1,0,0,0,0,1,1}

B {-1,-1,0,0,0,0,-1,-1}

C {-1,1,0,0,0,0,1,-1}

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

View Answer

Answer:{1,-1,0,0,0,0,-1,1}

9 If Z{x₁(n)}=X₁(z) and Z{x₂(n)}=X₂(z) then what is the z-transform of correlation between the two signals?

A X₁(z).X₂(z^-1)

B X₁(z).X₂(z^-1)

C X₁(z).X₂(z)

D X₁(z).X₂(-z)

View Answer

Answer:X₁(z).X₂(z^-1)

10 If x(n) is causal, then limz→∞ X(z)=?

A x(-1)

B x(1)

C x(0)

D Cannot be determined

View Answer

Answer:x(0)

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test	Start Test!
SSC MTS Mock Test	Start Test
IBPS CLERK MOCK TEST	Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH)	Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi)	Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH)	Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH)	Start Test!
IB Security Assistant Mock test 1 (english)	Start Test!
UP POLICE CONSTABLE MOCK TEST 1	Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI)	Start Test!