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The iterative process may converge to a global minimum.

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The iterative process may converge to a global minimum.

(a) True

(b) False

This question was addressed to me during an online interview.

Asked question is from Design of IIR Filters in Frequency Domain topic in portion Digital Filters Design of Digital Signal Processing

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Correct option is (b) False

The explanation is: The major difficulty with any iterative procedure that searches for the parameter values that minimize a non-linear function is that the process may converge to a local minimum instead of a global minimum.

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