EC > GATE 2026 > LTI Systems
Consider the discrete time system (S) with input x[n] and output y[n] as shown in the Figure. The two sub-systems represented by their impulse responses h1[n] and h2[n] are linear and time invariant.
Which of the following statements is necessarily TRUE?
A
S is causal.
B
S is linear and time invariant.
C
S is linear and time varying.
D
S is non-linear.

Correct :

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