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Perfect Squares in an Array Test | Pre-employment assessment - Testlify
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Perfect Squares in an Array Test

Overview of Perfect Squares in an Array Test

The question tests the attendee's understanding of palindromes and their ability to identify and score palindromic substrings of a given string and also tests the attendee's understanding of arrays and their ability to partition an array into sub arr

Skills measured

  • Programming (Algorithms)

Available in



Coding Test


15 Mins





Use of Perfect Squares in an Array test

The task is to find the total number of perfect squares in the given array. A perfect square is a number that can be written as a square of an integer. The numbers 0, 1, 4, 9, etc., are perfect squares. The algorithm to solve this problem involves iterating through the array and checking whether each number is a perfect square by taking its square root and checking if the result is an integer.

Note on Algorithm: To check if a number is a perfect square, we can take its square root using the sqrt() function and check if the result is an integer using the is_integer() method. If the result is an integer, we count it as a perfect square.

Relevant for

  • Android Developer
  • App Developer
  • C Developer
  • Flutter Developer
  • Java Developer
  • JavaScript Developer
  • PHP Developer
  • Python Developer
  • React Developer
  • React Native Developer
  • Ruby on Rails Developer
  • TypeScript Developer

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Programming (Algorithms)

In the Perfect Squares in an Array problem, the algorithmic skill of efficiently determining if a number is a perfect square is crucial. This skill involves using mathematical techniques such as square roots or checking for perfect square properties to quickly identify if a number is a perfect square. By mastering this skill, programmers can optimize their code to efficiently solve problems related to perfect squares in arrays, improving the overall performance and effectiveness of their algorithms. This skill is essential in various programming tasks and can be applied in a wide range of problem-solving scenarios.

The Perfect Squares in an Array test is created by a 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.

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