Official PYQ · 2015Set 3 · Q42Discrete-time SignalsMCQ2 marks

GATE EC 2015 Set 3 Q42 — Discrete-time Signals

Suppose $x[n]$ is an absolutely summable discrete-time signal. Its $z$ -transform is a rational function with two poles and two zeroes. The poles are at $z = \pm 2j.$ Which one of the following statements is TRUE for the signal $x[n]$ ?

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Answer: C

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Published 10 Oct 2026

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