Coding.
Multi-Language (Coding): Longest Common Subsequence Test
Given two strings, the goal is to find the length of the longest common subsequence that they share. A subsequence is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining.
Summarize this test and see how it helps assess top talent with:
- Test type
- Coding
- Duration
- 40 min
- Level
- Advanced
- Questions
- 1
This test is available in 1 languages
- English
Skills measured
Programming (Algorithm)
Use of the Multi-Language (Coding): Longest Common Subsequence Test
Recursion is one of the common ways to solve the LCS problem. The idea is to break down the problem into smaller subproblems and solve them recursively. Specifically, we can consider the last characters of the two strings. There are three possible cases: ->The last characters of both strings match: In this case, the LCS length can be obtained by adding 1 to the LCS of the two strings with their last characters removed. ->The last characters of both strings do not match: In this case, we have two subproblems, finding the LCS of the first string with the second string with their last characters removed, and finding the LCS of the second string with the first string with their last characters removed. The LCS length is then the maximum of these two subproblems. ->One of the strings is empty: In this case, the LCS length is 0.
Who is this test for?
This test library assesses the logical thinking and the recursive programming fluency of the candidate.
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The Multi-Language (Coding): Longest Common Subsequence Subject Matter Expert
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Multi-Language (Coding): Longest Common Subsequence Test
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