For n < 0, there is no overlap between the non-zero postions

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For n < 0, there is no overlap between the non-zero postions of x[k] and h[n – k] and consequently, y[n] has a value equal to—

1. 1
2. – 1
3. 0
4. ± 1

Correct Option: C

	_∞
y(n) =		x(k) x[n – k]
	^{k = – ∞}

i.e., convolution of two sequence x[ n] and x[ n] then loss if there is no overlap between the non-zero portion of x[ k] and x[n – 1] then y (1) will be zero.