
Longest Common Subsequences Quiz
Authored by PANDU WICAKSONO
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the goal of the longest common subsequence (LCS) problem?
To count the number of common elements in two sequences
To find the shortest subsequence of two sequences
To find a maximum-length common subsequence of two sequences
To determine if two sequences are identical
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a characteristic of the LCS problem?
It has an optimal substructure property
It is always solvable in linear time
It can be solved using a brute-force approach efficiently
It requires only one sequence to solve
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of LCS, what does the variable 'c[i, j]' represent?
The maximum length of any subsequence
The length of the longest common subsequence of Xi and Yj
The total number of subsequences of X
The index of the longest subsequence found
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the time complexity of the LCS algorithm when using a dynamic programming approach?
O(m+n)
O(m^2)
Θ(mn)
O(n log n)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements is true regarding the space complexity of the LCS algorithm?
It requires Θ(mn) space
It requires O(m+n) space
It requires O(m^2) space
It can be solved in constant space
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the output of the PRINT-LCS procedure for the sequences X = (A, B, C, B, D, A, B) and Y = (B, D, C, A, B, A)?
(B, D, A)
(A, B, C)
(B, C, B, A)
(B, C, A)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one way to improve the LCS algorithm mentioned in the text?
By using a single array instead of a table
By eliminating the b table and reconstructing LCS in O(m+n) time
By increasing the size of the c table
By using a different programming language
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