Algorithms Interview Questions & Practice

Sample Algorithms interview questions

• Complexity Analysis

  Can you explain what Big-O notation actually measures, and what it deliberately ignores?

• Arrays Strings

  Can you describe how you'd approach finding whether an array contains a pair of numbers that sum to a target value, and what the time complexity of your approach would be?

• Trees Graphs

  Can you explain the difference between depth-first and breadth-first traversal, and when you'd choose one over the other?

• Sorting Searching

  Can you explain how quicksort works at a high level, and what its worst-case time complexity is and why?

• Dynamic Programming

  Can you explain what makes a problem a good candidate for dynamic programming?

• Recursion Backtracking

  Can you explain what a base case is in recursion, and what happens if you get it wrong?

• Data Structure Tradeoffs

  Can you explain the tradeoffs between using an array versus a linked list for a given problem?

• Problem Solving Approach

  Walk me through how you approach a problem you've never seen before — what's your process before you start coding?

These are a few examples — each real session pulls 5 questions at random from a larger pool across every category above, so repeat sessions won't repeat the same set.

Frequently asked questions

Is this a live-coding Algorithms interview?

No. Algorithms practice on Hone is a spoken, conceptual discussion — you explain your reasoning out loud rather than writing or sharing code.

How many Algorithms questions are there?

Each session pulls 5 questions at random from a larger pool across multiple categories, so repeat sessions don't repeat the same set.

Can I choose the difficulty?

Yes — easy, medium, or hard, chosen right before you start. It changes how hard the interviewer pushes on follow-ups and how strictly it scores your answers.

Is it free?

Yes — every account gets 5 interviews a month, any track, for free. Pro upgrades to unlimited interviews for $99/month.