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Algorithms · Searching, Sorting and Hashing
Official IIT answer key · IIT Delhi · Audited Aug 2026
GATE CSE 2012 Q39 · MCQ · 2 marks
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Topic notes
Across GATE CS exams, Searching, Sorting, and Hashing are tested with a strong emphasis on exact comparison/swap counts, worst/best-case edge cases (especially for Quicksort and simultaneous min-max finding), trace-based simulation (such as step-by-step hashing probes and merge passes), and asymptotic tradeoffs for specialized or composite data inputs. Questions range from conceptual 1-mark classification to rigorous 2-mark NATs requiring precise manual execution of collision resolution or optimal merge trees.
Full Searching, Sorting and Hashing guide →A list of n strings, each of length n, is sorted into lexicographic order using the merge-sort algorithm. The worst case running time of this computation is
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