Multi-Language (Coding): Bob and a String Test

This coding test assesses a candidate's ability to program a small algorithm, testing their basic programming skills. Using a short and straightforward coding task, this test helps you identify developers with essential coding skills.

Available in

  • English

Summarize this test and see how it helps assess top talent with:

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1 Skills measured

  • Bitmasks, Strings, Combinatorics, Programming (Algorithms)

Test Type

Coding Test

Duration

20 mins

Level

Beginner

Questions

1

Use of Multi-Language (Coding): Bob and a String Test

The question provides a string S of length N, consisting of letters from A to B, and Q operations that can be performed on the string. Each operation flips the capitalization of the characters from L[i] to R[i]. After performing all the Q operations, Bob wants to find the length of the longest substring of the string that contains only capital letters. If this length is equal to REQ, then Bob considers the initial string S a good string. The task is to find the total number of possible initial good strings, given the value of N.

This question tests the attendee's understanding of strings and their manipulation, as well as their ability to implement the given conditions to arrive at the final solution. The solution involves iterating through all possible initial strings, performing the given operations on each string, and checking if the resulting string satisfies the conditions for a good string.

Skills measured

In Bob with a String, Bitmasks are used to efficiently represent sets of elements as binary numbers, allowing for faster computations in tasks such as finding all possible subsets of a given set. Strings are essential for storing and manipulating text data, enabling various string manipulation operations. Combinatorics is crucial for counting and generating possible combinations and permutations of elements, which is often necessary in algorithm design. Programming (Algorithms) skill is vital for implementing efficient solutions to complex problems, enhancing problem-solving abilities and algorithmic thinking. These skills are fundamental in developing effective algorithms for solving a wide range of problems in computer science.

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Recruiter efficiency

6x

Recruiter efficiency

Decrease in time to hire

55%

Decrease in time to hire

Candidate satisfaction

94%

Candidate satisfaction

Subject Matter Expert Test

The Multi-Language (Coding): Bob and a String Subject Matter Expert

Testlify’s skill tests are designed by experienced SMEs (subject matter experts). We evaluate these experts based on specific metrics such as expertise, capability, and their market reputation. Prior to being published, each skill test is peer-reviewed by other experts and then calibrated based on insights derived from a significant number of test-takers who are well-versed in that skill area. Our inherent feedback systems and built-in algorithms enable our SMEs to refine our tests continually.

Why choose Testlify

Elevate your recruitment process with Testlify, the finest talent assessment tool. With a diverse test library boasting 3000+ tests, and features such as custom questions, typing test, live coding challenges, Google Suite questions, and psychometric tests, finding the perfect candidate is effortless. Enjoy seamless ATS integrations, white-label features, and multilingual support, all in one platform. Simplify candidate skill evaluation and make informed hiring decisions with Testlify.

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