Which sorting algorithms is most efficient to sort string consisting of ASCII characters?
(A) Quick sort
(B) Heap sort
(C) Merge sort
(D) Counting sort
Answer: (D)
Explanation: Counting sort algorithm is efficient when range of data to be sorted is fixed. In the above question, the range is from 0 to 255(ASCII range). Counting sort uses an extra constant space proportional to range of data.
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