Question

Statement (I): Aliasing occurs when the sampling frequency is less than twice the maximum frequency in the signal.

Statement (II): Aliasing is a reversible process.

(a) Both statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I).

(b) Both Statement (I) and Statement (II) are individually true but Statement (II) is not correct explanation of Statement (I)

(c) Statement (I) is true but Statement (II) is false

(d) Statement (I) is False but Statement (II) is true

I have been asked this question in an interview for internship.

My doubt is from Spectrum Analysis of Sampling Process in section Digital Control Systems of Control Systems

Answer 1

Correct choice is (c) Statement (I) is true but Statement (II) is false

To explain I would say: Aliasing is an irreversible process. Once aliasing has occurred then signal can-not be recovered back.