Mergesort requires us to store the entire array of key values in internal memory before we can begin the merge operation.

Name: Mergesort requires us to store the entire array of key values in internal memory before we can begin the merge operation.
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Quizplus · Accepted Answer

Mergesort can be implemented in a way that it does not require the entire array to be in internal memory for the merge operation, especially in external sorting scenarios where data is read from and written to external storage in chunks.

Mergesort Requires Us to Store the Entire Array of Key