What is a time complexity for finding all the tandem repeats?

Category: QuestionsWhat is a time complexity for finding all the tandem repeats?
Editor">Editor Staff asked 4 weeks ago

What is a time complexity for finding all the tandem repeats?
 
(a) Ɵ (n)
 
(b) Ɵ (n!)
 
(c) Ɵ (1)
 
(d) O (n log n + z)
 
Query is from Suffix tree topic in chapter Trie of Data Structures & Algorithms I
 
The question was posed to me at a job interview.

1 Answers
Editor">Editor Staff answered 4 weeks ago

The correct option is (a) Ɵ (n)
 
Best explanation: Tandem Repeats are formed in DNA when the nucleotides pattern repeats more than once. To check if a substring is present in a string of a length of n, the time complexity for such operation is found to be O (n). The time complexity for finding all the tandem repeats in a string is O (n log n + z).