Software Developer Mock Interview

Master 30 Software Developer interview questions covering algorithms, system design, and coding challenges.

Question 9 of 30

Describe how do you implement an insertion sort algorithm, and what's the easiest way to do it?

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Tom Dushaj
Tom Dushaj

Tom Dushaj is a business and technology executive and the author of 'Resumes That Work.' Tom has vast experience providing solutions to Fortune 500 companies in the areas of Information Technology Consulting, ERP Software, Personnel Management, and Intern

I find that Insertion sort algorithms are a challenge for many software developers, but I have a high confidence level and expertise in this area. The lens from which I have developed software is through a simple practice of patience. This helps me focus on the quality of work. Let me explain the easiest way I develop insertion sort algorithms. I start by making the second element of the given array, i.e., the element at index 1, for example, the key. The key element is the new card that we need to add to our existing sorted set of cards. I then compare the key element with the other elements before it. In this case, the element at index 0: If I find that the key element is less than the first element, i insert a key element before the first element. If, on the other hand, the key element is greater than the first element, then we insert it after the first element.

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