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Suffix Array MCQs
1. What will be the suffix array of the string “engineering”?
a) 2 3 8 4 9 1 7 5 0 6 10
b) 5 0 6 1 4 9 1 7 0 2 3 8
c) 5 0 6 10 2 4 9 1 7 3 8
d) 5 0 6 10 2 3 8 4 9 1 7
Answer: 5 0 6 10 2 3 8 4 9 1 7
2. LCP array and ______ is used to construct suffix tree.
a) Hash tree
b) Hash trie
c) Suffix array
d) Balanced tree
Answer: Suffix array
3. What is the time required to locate the occurrences of a pattern P of length m in a string of length n using suffix array?
a) O(nm)
b) O(n2)
c) O(mnlogn)
d) O(mlogn)
Answer: O(mlogn)
4. If comparison based sorting algorithm is used construct the suffix array, then what will be time required to construct the suffix array?
a) O(nlogn)
b) O(n2)
c) O(n2logn)
d) O(n2) + O(logn)
Answer: O(n2logn)
5. Which of the following is false?
a) Suffix array is always sorted
b) Suffix array is used in string matching problems
c) Suffix array is always unsorted
d) Suffix array contains all the suffixes of the given string
Answer: Suffix array is always unsorted
6. Suffix array of the string “statistics” is ____________
a) 2 8 7 4 9 0 5 1 6 3
b) 2 7 4 9 8 0 5 1 6 3
c) 2 4 9 0 5 7 8 1 6 3
d) 2 8 7 0 5 1 6 9 4 3
Answer: 2 8 7 4 9 0 5 1 6 3
7. Suffix array can be created by performing __________ traversal of a suffix tree.
a) breadth-first
b) level order
c) depth-first
d) either breadth-first or level order
Answer: depth-first
8. Which of the following is/are advantages suffix array one suffix tree?
I. Lesser space requirement
II. Improved cache locality
III. Easy construction in linear time
a) Only I
b) All I, II and III
c) Only I and III
d) Only II and III
Answer: All I, II and III
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