DFCCIL EE/EC Signals & Systems QUIZ - 2

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Question 1

A signal given by x[n] = is applied as an input to a system whose impulse response given as The output of the system is given as y[n], then y [2] is _______.

• A0
• B4
• C1
• D2

Question 2

Which of the following is true?

• Au(n)*u(n) = r(n+1) and
• Bu(n)*u(n) = u(n+1) and
• Cu(n)*u(n) = r(n+1) and
• Du(n)*u(n) = u(n+1) and

Question 3

Consider the system shown below:

In which of the following cases will be the system be stable?

• Aβ>0
• Bβ<0
• CThe system will never be stable
• Dβ=0

Question 4

If the unit step response of a network is , then its unit impulse response is

• A
• B
• C
• D

Question 5

The resultant of the convolution of δ(n + 2) with δ(–n + 4)?

• Aδ(n + 6)
• Bδ(n + 2)
• Cδ(2 – n)
• Dδ(n – 2)

Question 6

An LTI system has impulse response h(t) = u(t – 1). If input is x(t) = u(t – 2) then the output y(t) is__________.

• At u(t – 1)
• B(t ) u(t-3)
• C(t – 3) u(t)
• D(t-3) u(t – 3)

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