This document contains 7 practice questions about signals and systems for a signals and systems course. The questions cover topics like checking causality and stability of systems based on their impulse responses, finding the convolution of signals, computing the auto correlation of a signal, and using a matrix method to find the convolution of a system and input.

1. NEHRU COLLEGE OF ENGINEERING AND RESEARCH CENTRE
QUESTION BANK
EC 202: SIGNALS & SYSTEMS
MODULE II
1. Check the causality and stability of the systems whose impulse responses are given
by (i) h(t)= eat u(t) (ii) h(n)= 2nu(-n)
2. Find the convolution of x(t)=u(t+1)-u(t-1)
with h(t)=u(t+2)-u(t-2)
3. Find the output of the system with impulse response h(n)= {1,2} to the input x(n)=
{2,-3,7}
4. Compute the auto correlation of the signal x(n)=an u(n) for 0<a<1
5. Find the output of the system with impulse response h(n)= (1/2)nu(n) to the input x(n)=
u(n-5)
6. Find the convolution of x1(t)=e-2tu(t) and x2(t)= u(t) + u(t-2)
7. Find the convolution of h(n)={1,2} with x{n}={2,-3,7} using Matrix method.