Multi-Language (Coding): Factorial of Sum of Digits 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

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1 Skills measured

  • Programming (Algorithms)

Test Type

Coding Test

Duration

25 mins

Level

Beginner

Questions

1

Use of Multi-Language (Coding): Factorial of Sum of Digits Test

The problem statement requires us to find the total number of "special numbers" in an array of positive integers. A special number is defined as a number whose final sum (sum of each digit until the sum is less than 10) has a factorial sum that contains each digit of the number. To solve this problem, we can use the following approach:

Define a helper function calculate_factorial_sum that takes an integer n as input and returns the factorial sum of n. The factorial sum of n is calculated as the factorial of the final sum of n. Define a helper function calculate_final_sum that takes an integer n as input and returns the final sum of n. Iterate through each element in the array arr. For each element, calculate its final sum and factorial sum using the helper functions calculate_final_sum and calculate_factorial_sum. Check if each digit in the number is present in the factorial sum. If it is, mark the number as a special number.

Skills measured

The Factorial of Sum of Digits algorithm involves calculating the sum of the digits of a given number and then finding the factorial of that sum. This skill is important in programming as it helps in developing problem-solving abilities and improving mathematical reasoning. It also enhances understanding of recursion and loops, which are fundamental concepts in programming. By mastering this algorithm, programmers can improve their ability to tackle complex problems and optimize their code for better performance. Additionally, it helps in developing a strong foundation in algorithmic thinking and problem-solving techniques.

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The Multi-Language (Coding): Factorial of Sum of Digits Subject Matter Expert

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