The signal given by the equation \(\sum_{n=-{\infty}}^{\infty}|x(n)|^2\) is known as __________(a) Energy signal(b) Power signal(c) Work done signal(d) None of the mentionedI had been asked this question during an interview.My enquiry is from Discrete Time Signals in division Discrete Time Signals and Systems of Digital Signal Processing

The signal given by the equation \(\sum_{n=-{\infty}}^{\infty}|x(n)|^2

1.	The signal given by the equation \(\sum_{n=-{\infty}}^{\infty}\|x(n)\|^2\) is known as __________(a) Energy signal(b) Power signal(c) Work done signal(d) None of the mentionedI had been asked this question during an interview.My enquiry is from Discrete Time Signals in division Discrete Time Signals and Systems of Digital Signal Processing
Answer» RIGHT option is (a) Energy SIGNAL To EXPLAIN I would say: We have used the magnitude-squared values of X(n), so that our definition applies to complex-valued as well as real-valued signals. If the energy of the signal is FINITE i.e., 0

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