Oracle vs Zeta Interview Questions
Oracle lists 314 LeetCode interview questions while Zeta lists 30. They share 15 problems — 5% of Oracle's bank and 50% of Zeta's. Focus on the overlap first, then drill into 299 Oracle-only and 15 Zeta-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 15 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Oracle and Zeta.
Step 2 — Company-specific depth: Add Oracle-specific problems like LRU Cache, Number of Islands, Two Sum and Zeta-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Zeta skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
15 Shared Questions
High-priority problems to practice for both Oracle and Zeta.
| Problem | Difficulty |
|---|---|
| Longest Substring Without Repeating Characters | Medium |
| Sliding Window Maximum | Hard |
| Merge Intervals | Medium |
| Trapping Rain Water | Hard |
| Maximum Subarray | Medium |
| Median of Two Sorted Arrays | Hard |
| Insert Delete GetRandom O(1) | Medium |
| Task Scheduler | Medium |
| Minimum Window Substring | Hard |
| Capacity To Ship Packages Within D Days | Medium |
| House Robber | Medium |
| Word Break | Medium |
| Split Array Largest Sum | Hard |
| Remove K Digits | Medium |
| Reverse Nodes in k-Group | Hard |
Unique to Oracle (299)
Problems in Oracle's list that do not appear at Zeta.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Number of Islands | Medium |
| Two Sum | Easy |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Valid Parentheses | Easy |
| Merge k Sorted Lists | Hard |
| Meeting Rooms II | Medium |
| Longest Palindromic Substring | Medium |
| Spiral Matrix | Medium |
| Minimum One Bit Operations to Make Integers Zero | Hard |
| LFU Cache | Hard |
Unique to Zeta (15)
Problems in Zeta's list that do not appear at Oracle.
| Problem | Difficulty |
|---|---|
| Apply Operations to Make Two Strings Equal | Medium |
| Palindrome Partitioning II | Hard |
| Remove Boxes | Hard |
| Next Greater Element II | Medium |
| Maximal Rectangle | Hard |
| Count Univalue Subtrees | Medium |
| Heaters | Medium |
| Find All Possible Recipes from Given Supplies | Medium |
| Minimize the Maximum Difference of Pairs | Medium |
| Binary Tree Cameras | Hard |
| Shifting Letters II | Medium |
| Partition to K Equal Sum Subsets | Medium |
Frequently Asked Questions
How many LeetCode questions do Oracle and Zeta share?
Oracle and Zeta share 15 LeetCode interview questions. 299 problems appear only in Oracle's list and 15 appear only in Zeta's list.
What topics overlap most between Oracle and Zeta?
The most common shared topics between Oracle and Zeta are Array (11 shared questions), Hash Table (5 shared questions), Dynamic Programming (5 shared questions), String (4 shared questions), Sliding Window (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Oracle or Zeta?
Oracle has 61 Easy, 194 Medium, and 59 Hard questions. Zeta has 0 Easy, 20 Medium, and 10 Hard questions. Zeta has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Oracle and Zeta?
Start with the 15 shared problems since they cover what both companies ask most often. Then add 20 Oracle-specific and 15 Zeta-specific questions to round out your prep.