Roblox Coding Interview Questions
26 Roblox coding interview problems with full optimal solutions — 16 easy, 8 medium, 2 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an Roblox interviewer values, and a FAQ section.
Showing 16 problems of 26
- #16easyfoundational
16. Flood Fill
Recolor a connected region starting from a source pixel — the same flood-fill primitive Roblox Studio uses to paint terrain biomes and propagate block-color changes across adjacent voxels.
- #17easyfoundational
17. Climbing Stairs
Count distinct ways to reach the top taking 1 or 2 steps at a time — Roblox references this DP warmup when discussing how the engine enumerates valid move combinations for character pathfinding constraints.
- #1easyfoundational
1. Two Sum
Given an array of integers and a target, return the indices of two numbers that add up to the target.
- #2easyfoundational
2. Valid Parentheses
Determine if a string of brackets is properly opened and closed in the correct order.
- #3easyfoundational
3. Merge Two Sorted Lists
Merge two sorted linked lists into a single sorted linked list.
- #4easyfoundational
4. Remove Duplicates from Sorted Array
Remove duplicates from a sorted array in-place and return the new length.
- #5easyfoundational
5. Remove Element
Remove all occurrences of a target value from an array in-place.
- #6easyfoundational
6. Search Insert Position
Find the index where a target would be inserted in a sorted array.
- #7easyfoundational
7. Plus One
Increment a large integer represented as a digit array.
- #8easyfoundational
8. Merge Sorted Array
Merge two sorted arrays in-place into the first array.
- #9easyfoundational
9. Binary Tree Inorder Traversal
Return the in-order traversal of a binary tree's node values.
- #10easyfoundational
10. Same Tree
Check whether two binary trees are structurally identical with matching values.
- #11easyfoundational
11. Symmetric Tree
Check whether a binary tree is a mirror image of itself.
- #12easyfoundational
12. Maximum Depth of Binary Tree
Return the maximum depth of a binary tree.
- #13easyfoundational
13. Balanced Binary Tree
Determine if a binary tree is height-balanced.
- #14easyfoundational
14. Minimum Depth of Binary Tree
Find the shortest root-to-leaf path length.