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Java - Interview Questions and Answers on Collections.sort()

Q1.  Which sorting algorithm is used by Collections.sort() in Java ?

Ans. The sorting algorithm is a modified mergesort. This algorithm offers guaranteed n log(n) performance.

Q2.  Collections.sort can only be performed on ..

 a. Set
 b. List
 c. Map
 d. Any Collection implementation

Ans. List

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