JOIN ADRE 2.0 Telegram Group

Digital Signal Processing Interview Questions and Answers | 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

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)

Answer:x(n)+y(n) ↔ X(z)+Y(z)
Advertisement
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 zkX(z)
B z-kX(z)
C X(z-k)
D X(z+k)

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

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

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

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

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}

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)

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

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!
Advertisement
Assam Direct Recruitment Test Series