DIGITAL SIGNAL PROCESSING
Questions: Answer the following multiple choice questions.
Q1 If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be:
a) Delayed
b) Advanced
c) No operation
d) None of the mentioned
Q.2 What is the output y(n) when a signal x(n)=n*u(n)is passed through a accumulator system under the conditions that it is initially relaxed?
a) (n2+n+1)/2
b) (n(n+1))/2
c) (n2+n+2)/2
d) None of the mentioned
Q.3 The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Delay' system is:
a) (3,2,1,0)
b) (1,2,3,0)
c) (0,1,2,3)
d) None of the mentioned
Q.4 Whether the system described by the input-output equations y(n)=x(n)- x(n-1) a Time-variant system?
a) True b) False
Q.5 If the output of the system of the system at any ‘n' depends only the present or the past values of the inputs then the system is said to be:
a) Linear
b) Non-Linear
c) Causal
d) Non-causal
Q.6 The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Identical' system is:
a) (3,2,1,0)
b) (1,2,3,0)
c) (0,1,2,3)
d) None of the mentioned
Q.7 If the output of the system is
n
y(n) = ∑ x(k)
k=-∞
with an input of x(n) then the system will work as:
a) Accumulator
b) Adder
c) Subtractor
d) Multiplier
Q.8 The block denoted as follows is known as: z-1
a) Delay block
b) Advance block
c) Multiplier block
d) Adder block
Q.9 The system described by the input-output equation y(n)=nx(n)+bx3(n) is
a:
a) Static system
b) Dynamic system
c) Identical system
d) None of the mentioned
Q.10 The system described by the input-output equations y(n)=x2(n) is a Non-linear system.
a) True b) False