Official PYQ · 2025Set 1 · Q7LTI SystemsMCQ1 mark

GATE EC 2025 Set 1 Q7 — LTI Systems

Consider the discrete-time system below with input $x[n]$ and output $y[n]$ . In the figure, $h_{1}[n]$ and $h_{2}[n]$ denote the impulse responses of LTI Subsystems $1$ and $2$ , respectively. Also, $\delta[n]$ is the unit impulse, and $b>0$ .

Assuming $h_{2}[n] \neq \delta[n]$ , the overall system (denoted by the dashed box) is $\_\_\_\_\_\_$

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Published 10 Oct 2026

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