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Aptitude | GATE CS 1998 | Question 23

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  • Difficulty Level : Easy
  • Last Updated : 11 Oct, 2017

How many substrings of different length (non-zero) can be formed from a character string of length n ?
(A) n
(B) n^2
(C) 2^n
(D) n(n+1)/2

Answer: (D)


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