IBM vs Turing Interview Questions
IBM lists 115 LeetCode interview questions while Turing lists 37. They share 13 problems — 11% of IBM's bank and 35% of Turing's. Focus on the overlap first, then drill into 102 IBM-only and 24 Turing-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 13 overlapping problems first. These are the highest-yield questions for candidates interviewing at both IBM and Turing.
Step 2 — Company-specific depth: Add IBM-specific problems like Find the Smallest Divisor Given a Threshold, Gray Code, Exclusive Time of Functions and Turing-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Turing skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
13 Shared Questions
High-priority problems to practice for both IBM and Turing.
| Problem | Difficulty |
|---|---|
| 3Sum | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Two Sum | Easy |
| Merge Intervals | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Longest Common Prefix | Easy |
| Valid Parentheses | Easy |
| Longest Palindromic Substring | Medium |
| Maximum Subarray | Medium |
| Group Anagrams | Medium |
| Product of Array Except Self | Medium |
| Median of Two Sorted Arrays | Hard |
| Degree of an Array | Easy |
Unique to IBM (102)
Problems in IBM's list that do not appear at Turing.
| Problem | Difficulty |
|---|---|
| Find the Smallest Divisor Given a Threshold | Medium |
| Gray Code | 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 |
| Count Ways to Group Overlapping Ranges | Medium |
| Meeting Rooms II | Medium |
| Rotate Image | Medium |
| Minimum Absolute Difference | Easy |
| Minimum Operations to Make All Array Elements Equal | Medium |
Unique to Turing (24)
Problems in Turing's list that do not appear at IBM.
Frequently Asked Questions
How many LeetCode questions do IBM and Turing share?
IBM and Turing share 13 LeetCode interview questions. 102 problems appear only in IBM's list and 24 appear only in Turing's list.
What topics overlap most between IBM and Turing?
The most common shared topics between IBM and Turing are Array (9 shared questions), String (5 shared questions), Hash Table (4 shared questions), Sorting (3 shared questions), Dynamic Programming (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: IBM or Turing?
IBM has 33 Easy, 73 Medium, and 9 Hard questions. Turing has 10 Easy, 23 Medium, and 4 Hard questions. Turing has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both IBM and Turing?
Start with the 13 shared problems since they cover what both companies ask most often. Then add 20 IBM-specific and 20 Turing-specific questions to round out your prep.