Deloitte vs Oracle Interview Questions
Deloitte lists 43 LeetCode interview questions while Oracle lists 314. They share 31 problems — 72% of Deloitte's bank and 10% of Oracle's. Focus on the overlap first, then drill into 12 Deloitte-only and 283 Oracle-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 31 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Deloitte and Oracle.
Step 2 — Company-specific depth: Add Deloitte-specific problems like Change Null Values in a Table to the Previous Value, Add Binary, Managers with at Least 5 Direct Reports and Oracle-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Oracle skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
31 Shared Questions
High-priority problems to practice for both Deloitte and Oracle.
| Problem | Difficulty |
|---|---|
| Merge k Sorted Lists | Hard |
| Two Sum | Easy |
| Second Highest Salary | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Longest Palindromic Substring | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Longest Common Prefix | Easy |
| Container With Most Water | Medium |
| Palindrome Number | Easy |
| Climbing Stairs | Easy |
| Valid Palindrome | Easy |
| Merge Intervals | Medium |
| First Unique Character in a String | Easy |
| 3Sum | Medium |
| Maximum Subarray | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Group Anagrams | Medium |
| Remove K Digits | Medium |
| Edit Distance | Medium |
| Coin Change | Medium |
| Kth Largest Element in an Array | Medium |
| Roman to Integer | Easy |
| Split Array Largest Sum | Hard |
| Longest Consecutive Sequence | Medium |
| Rotate Array | Medium |
| Next Permutation | Medium |
| Valid Anagram | Easy |
| Remove All Adjacent Duplicates In String | Easy |
| Subarray Sum Equals K | Medium |
Showing top 30 of 31 shared problems.
Unique to Deloitte (12)
Problems in Deloitte's list that do not appear at Oracle.
| Problem | Difficulty |
|---|---|
| Change Null Values in a Table to the Previous Value | Medium |
| Add Binary | Easy |
| Managers with at Least 5 Direct Reports | Medium |
| Minimum Time to Repair Cars | Medium |
| Nth Highest Salary | Medium |
| Rising Temperature | Easy |
| Reverse Pairs | Hard |
| Remove K-Balanced Substrings | Medium |
| Max Consecutive Ones | Easy |
| Customers Who Never Order | Easy |
| Shortest Unsorted Continuous Subarray | Medium |
| Super Ugly Number | Medium |
Unique to Oracle (283)
Problems in Oracle's list that do not appear at Deloitte.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Number of Islands | Medium |
| Top K Frequent Elements | Medium |
| Sliding Window Maximum | Hard |
| Meeting Rooms II | Medium |
| Spiral Matrix | Medium |
| Minimum One Bit Operations to Make Integers Zero | Hard |
| LFU Cache | Hard |
| Search in Rotated Sorted Array | Medium |
| Asteroid Collision | Medium |
| Remove All Adjacent Duplicates in String II | Medium |
| Reverse Linked List | Easy |
Frequently Asked Questions
How many LeetCode questions do Deloitte and Oracle share?
Deloitte and Oracle share 31 LeetCode interview questions. 12 problems appear only in Deloitte's list and 283 appear only in Oracle's list.
What topics overlap most between Deloitte and Oracle?
The most common shared topics between Deloitte and Oracle are Array (16 shared questions), String (12 shared questions), Hash Table (8 shared questions), Two Pointers (7 shared questions), Dynamic Programming (7 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Deloitte or Oracle?
Deloitte has 17 Easy, 23 Medium, and 3 Hard questions. Oracle has 61 Easy, 194 Medium, and 59 Hard questions. Oracle has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Deloitte and Oracle?
Start with the 31 shared problems since they cover what both companies ask most often. Then add 12 Deloitte-specific and 20 Oracle-specific questions to round out your prep.