Apple vs Siemens Interview Questions
Apple lists 300 LeetCode interview questions while Siemens lists 25. They share 17 problems — 6% of Apple's bank and 68% of Siemens's. Focus on the overlap first, then drill into 283 Apple-only and 8 Siemens-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 17 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Apple and Siemens.
Step 2 — Company-specific depth: Add Apple-specific problems like Design Hit Counter, Longest Common Prefix, Reverse Linked List 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
17 Shared Questions
High-priority problems to practice for both Apple and Siemens.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Two Sum | Easy |
| Number of Islands | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Rotate Array | Medium |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Valid Parentheses | Easy |
| Merge Two Sorted Lists | Easy |
| Remove Duplicates from Sorted Array | Easy |
| Longest Palindromic Substring | Medium |
| Valid Anagram | Easy |
| The Skyline Problem | Hard |
| Maximum Product of Three Numbers | Easy |
| First Missing Positive | Hard |
| Clone Graph | Medium |
Unique to Apple (283)
Problems in Apple's list that do not appear at Siemens.
| Problem | Difficulty |
|---|---|
| Design Hit Counter | Medium |
| Longest Common Prefix | Easy |
| Reverse Linked List | Easy |
| Valid Sudoku | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Product of Array Except Self | Medium |
| Valid Palindrome | Easy |
| Rotate Image | Medium |
| Reverse Words in a String | Medium |
| Kth Largest Element in an Array | Medium |
Unique to Siemens (8)
Problems in Siemens's list that do not appear at Apple.
| Problem | Difficulty |
|---|---|
| Minimized Maximum of Products Distributed to Any Store | Medium |
| Peaks in Array | Hard |
| Minimum Add to Make Parentheses Valid | Medium |
| Palindrome Number | Easy |
| Maximum Product Subarray | Medium |
| Angle Between Hands of a Clock | Medium |
| Single Number III | Medium |
| Strong Password Checker | Hard |
Frequently Asked Questions
How many LeetCode questions do Apple and Siemens share?
Apple and Siemens share 17 LeetCode interview questions. 283 problems appear only in Apple's list and 8 appear only in Siemens's list.
What topics overlap most between Apple and Siemens?
The most common shared topics between Apple and Siemens are Array (11 shared questions), Hash Table (7 shared questions), Sorting (6 shared questions), String (4 shared questions), Two Pointers (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Apple or Siemens?
Apple has 76 Easy, 178 Medium, and 46 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 Apple and Siemens?
Start with the 17 shared problems since they cover what both companies ask most often. Then add 20 Apple-specific and 8 Siemens-specific questions to round out your prep.