Digital Signal Processing Gate | Digital Signal Processing MCQs

(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

(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

Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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