IBM vs Siemens Interview Questions
IBM lists 115 LeetCode interview questions while Siemens lists 25. They share 10 problems — 9% of IBM's bank and 40% of Siemens's. Focus on the overlap first, then drill into 105 IBM-only and 15 Siemens-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 Siemens.
Step 2 — Company-specific depth: Add IBM-specific problems like Find the Smallest Divisor Given a Threshold, Gray Code, 3Sum and Siemens-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Siemens 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 Siemens.
| Problem | Difficulty |
|---|---|
| Best Time to Buy and Sell Stock | Easy |
| Two Sum | Easy |
| Merge Intervals | Medium |
| Valid Parentheses | Easy |
| Longest Palindromic Substring | Medium |
| Group Anagrams | Medium |
| Rotate Array | Medium |
| Palindrome Number | Easy |
| Remove Duplicates from Sorted Array | Easy |
| LRU Cache | Medium |
Unique to IBM (105)
Problems in IBM's list that do not appear at Siemens.
| 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 |
| Count Ways to Group Overlapping Ranges | Medium |
| Meeting Rooms II | Medium |
| Rotate Image | Medium |
| Minimum Absolute Difference | Easy |
Unique to Siemens (15)
Problems in Siemens's list that do not appear at IBM.
| Problem | Difficulty |
|---|---|
| Minimized Maximum of Products Distributed to Any Store | Medium |
| Peaks in Array | Hard |
| Number of Islands | Medium |
| The Skyline Problem | Hard |
| Merge Two Sorted Lists | Easy |
| First Missing Positive | Hard |
| Valid Anagram | Easy |
| Maximum Product of Three Numbers | Easy |
| Minimum Add to Make Parentheses Valid | Medium |
| Maximum Product Subarray | Medium |
| Angle Between Hands of a Clock | Medium |
| Single Number III | Medium |
Frequently Asked Questions
How many LeetCode questions do IBM and Siemens share?
IBM and Siemens share 10 LeetCode interview questions. 105 problems appear only in IBM's list and 15 appear only in Siemens's list.
What topics overlap most between IBM and Siemens?
The most common shared topics between IBM and Siemens are Array (6 shared questions), Hash Table (3 shared questions), String (3 shared questions), Two Pointers (3 shared questions), Dynamic Programming (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: IBM or Siemens?
IBM has 33 Easy, 73 Medium, and 9 Hard questions. Siemens has 8 Easy, 13 Medium, and 4 Hard questions. Siemens has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both IBM and Siemens?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 IBM-specific and 15 Siemens-specific questions to round out your prep.