IBM vs Roblox Interview Questions
IBM lists 115 LeetCode interview questions while Roblox lists 56. They share 10 problems — 9% of IBM's bank and 18% of Roblox's. Focus on the overlap first, then drill into 105 IBM-only and 46 Roblox-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both IBM and Roblox.
Step 2 — Company-specific depth: Add IBM-specific problems like Find the Smallest Divisor Given a Threshold, Gray Code, 3Sum and Roblox-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Roblox skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
10 Shared Questions
High-priority problems to practice for both IBM and Roblox.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Rotate Image | Medium |
| Merge Intervals | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Longest Common Prefix | Easy |
| Valid Parentheses | Easy |
| Longest Consecutive Sequence | Medium |
| Spiral Matrix | Medium |
| Trapping Rain Water | Hard |
| Task Scheduler | Medium |
Unique to IBM (105)
Problems in IBM's list that do not appear at Roblox.
| Problem | Difficulty |
|---|---|
| Find the Smallest Divisor Given a Threshold | Medium |
| Gray Code | Medium |
| 3Sum | Medium |
| Exclusive Time of Functions | Medium |
| Integer to Roman | Medium |
| Minimum Operations to Make Columns Strictly Increasing | Easy |
| Fizz Buzz | Easy |
| Roman to Integer | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Count Ways to Group Overlapping Ranges | Medium |
| Meeting Rooms II | Medium |
| Minimum Absolute Difference | Easy |
Unique to Roblox (46)
Problems in Roblox's list that do not appear at IBM.
Frequently Asked Questions
How many LeetCode questions do IBM and Roblox share?
IBM and Roblox share 10 LeetCode interview questions. 105 problems appear only in IBM's list and 46 appear only in Roblox's list.
What topics overlap most between IBM and Roblox?
The most common shared topics between IBM and Roblox are Array (7 shared questions), Hash Table (4 shared questions), String (3 shared questions), Matrix (2 shared questions), Sorting (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: IBM or Roblox?
IBM has 33 Easy, 73 Medium, and 9 Hard questions. Roblox has 8 Easy, 35 Medium, and 13 Hard questions. Roblox has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both IBM and Roblox?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 IBM-specific and 20 Roblox-specific questions to round out your prep.