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ECE · Q226

Signal Processing

Engineering and GATE · ECE · question 226

Q226

Consider a single input single output discrete-time system with x[n] as input and y[n] as output, where the two are related as \[y [ n ] = \ array*20c n | x [ n ] |,& for 0 n 10 \\ x [ n ] - x [ n - 1 ],& otherwise array .\] Which one of the following statements is true about the system?

Consider a single input single output discrete-time system with x[n] as input and y[n] as output, where the two are related as
y\left[ n \right] = \left\{ {\begin{array}{*{20}{c}} {n\left| {x\left[ n \right]} \right|,}&{{\text{for }}0 \leqslant n \leqslant 10} \\ {x\left[ n \right] - x\left[ {n - 1} \right],}&{{\text{otherwise}}} \end{array}} \right.
Which one of the following statements is true about the system?
A.
It is causal and stable
Answer
B.
It is causal but not stable
C.
It is not causal but stable
D.
It is neither causal nor stable

Answer: Option A

Solution

Answer: Option A
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