Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 Which bit coder is required to code a signal with 16 levels?
A 8 bit
B 4 bit
C 2 bit
D 1 bit

Answer:4 bit
2 Which of the following is done to convert a continuous time signal into discrete time signal?
A Modulating
B Sampling
C Differentiating
D Integrating

Answer:Sampling
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3 The deflection voltage of an oscilloscope is a ‘deterministic’ signal.
A True
B False

Answer:True
4 The even part of a signal x(t) is?
A x(t)+x(-t)
B x(t)-x(-t)
C (1/2)*(x(t)+x(-t))
D (1/2)*(x(t)-x(-t))

Answer:(1/2)*(x(t)+x(-t))
5 For a continuous time signal x(t) to be periodic with a period T, then x(t+mT) should be equal to ___________
A x(-t)
B x(mT)
C x(mt)
D x(t)

Answer:x(t)
6 Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Which of the following must be a rational number for x(t)=x1(t)+x2(t) to be periodic?
A T1+T2
B T1-T2
C T1/T2
D T1*T2

Answer:T1/T2
7 Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Then the fundamental period of x(t)=x1(t)+x2(t) is?
A LCM of T1 and T2
B HCF of T1and T2
C Product of T1 and T2
D Ratio of T1 to T2

Answer:LCM of T1 and T2
8 All energy signals will have an average power of ___________
A Infinite
B Zero
C Positive
D Cannot be calculated

Answer:Zero
9 x(t) or x(n) is defined to be an energy signal, if and only if the total energy content of the signal is a ___________
A Finite quantity
B Infinite
C Zero
D None of the mentioned

Answer:Finite quantity
10 What is the period of cos2t+sin3t?
A pi
B 2*pi
C 3*pi
D 4*pi

Answer:2*pi
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