Apple vs Deloitte Interview Questions
Apple lists 300 LeetCode interview questions while Deloitte lists 43. They share 30 problems — 10% of Apple's bank and 70% of Deloitte's. Focus on the overlap first, then drill into 270 Apple-only and 13 Deloitte-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 30 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Apple and Deloitte.
Step 2 — Company-specific depth: Add Apple-specific problems like LRU Cache, Number of Islands, Design Hit Counter and Deloitte-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Apple skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
30 Shared Questions
High-priority problems to practice for both Apple and Deloitte.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Longest Common Prefix | Easy |
| Rotate Array | Medium |
| Group Anagrams | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Valid Palindrome | Easy |
| Kth Largest Element in an Array | Medium |
| Maximum Subarray | Medium |
| Merge k Sorted Lists | Hard |
| Subarray Sum Equals K | Medium |
| Climbing Stairs | Easy |
| 3Sum | Medium |
| Longest Consecutive Sequence | Medium |
| First Unique Character in a String | Easy |
| Remove Duplicates from Sorted Array | Easy |
| Longest Palindromic Substring | Medium |
| Container With Most Water | Medium |
| Remove All Adjacent Duplicates In String | Easy |
| Roman to Integer | Easy |
| Coin Change | Medium |
| Edit Distance | Medium |
| Valid Anagram | Easy |
| Add Binary | Easy |
| Max Consecutive Ones | Easy |
| Reverse Pairs | Hard |
| Second Highest Salary | Medium |
| Reverse Vowels of a String | Easy |
Unique to Apple (270)
Problems in Apple's list that do not appear at Deloitte.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Number of Islands | Medium |
| Design Hit Counter | Medium |
| Reverse Linked List | Easy |
| Valid Sudoku | Medium |
| Top K Frequent Elements | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Product of Array Except Self | Medium |
| Rotate Image | Medium |
| Reverse Words in a String | Medium |
| Spiral Matrix | Medium |
Unique to Deloitte (13)
Problems in Deloitte's list that do not appear at Apple.
| Problem | Difficulty |
|---|---|
| Change Null Values in a Table to the Previous Value | Medium |
| Palindrome Number | Easy |
| Managers with at Least 5 Direct Reports | Medium |
| Minimum Time to Repair Cars | Medium |
| Nth Highest Salary | Medium |
| Remove K Digits | Medium |
| Rising Temperature | Easy |
| Remove K-Balanced Substrings | Medium |
| Split Array Largest Sum | Hard |
| Customers Who Never Order | Easy |
| Next Permutation | Medium |
| Shortest Unsorted Continuous Subarray | Medium |
Frequently Asked Questions
How many LeetCode questions do Apple and Deloitte share?
Apple and Deloitte share 30 LeetCode interview questions. 270 problems appear only in Apple's list and 13 appear only in Deloitte's list.
What topics overlap most between Apple and Deloitte?
The most common shared topics between Apple and Deloitte are Array (16 shared questions), String (13 shared questions), Hash Table (8 shared questions), Two Pointers (7 shared questions), Dynamic Programming (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Apple or Deloitte?
Apple has 76 Easy, 178 Medium, and 46 Hard questions. Deloitte has 17 Easy, 23 Medium, and 3 Hard questions. Apple has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Apple and Deloitte?
Start with the 30 shared problems since they cover what both companies ask most often. Then add 20 Apple-specific and 13 Deloitte-specific questions to round out your prep.