Cisco vs Oracle Interview Questions
Cisco lists 87 LeetCode interview questions while Oracle lists 314. They share 57 problems — 66% of Cisco's bank and 18% of Oracle's. Focus on the overlap first, then drill into 30 Cisco-only and 257 Oracle-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 57 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Cisco and Oracle.
Step 2 — Company-specific depth: Add Cisco-specific problems like Predict the Winner, Fizz Buzz, Snakes and Ladders 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
57 Shared Questions
High-priority problems to practice for both Cisco and Oracle.
| Problem | Difficulty |
|---|---|
| Longest Palindromic Substring | Medium |
| House Robber | Medium |
| Lucky Numbers in a Matrix | Easy |
| Rotate Image | Medium |
| Spiral Matrix | Medium |
| LRU Cache | Medium |
| Number of Valid Words in a Sentence | Easy |
| Merge Intervals | Medium |
| Word Search II | Hard |
| Maximum Subarray | Medium |
| Minimum Cost to Make Array Equal | Hard |
| Happy Number | Easy |
| Two Sum | Easy |
| Valid Parentheses | Easy |
| Trapping Rain Water | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Linked List Cycle | Easy |
| Merge Sorted Array | Easy |
| Decode String | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Letter Combinations of a Phone Number | Medium |
| Number of Islands | Medium |
| Move Zeroes | Easy |
| Reverse Linked List | Easy |
| Search a 2D Matrix | Medium |
| 3Sum | Medium |
| Longest Consecutive Sequence | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Meeting Rooms II | Medium |
| Permutation in String | Medium |
Showing top 30 of 57 shared problems.
Unique to Cisco (30)
Problems in Cisco's list that do not appear at Oracle.
Unique to Oracle (257)
Problems in Oracle's list that do not appear at Cisco.
Frequently Asked Questions
How many LeetCode questions do Cisco and Oracle share?
Cisco and Oracle share 57 LeetCode interview questions. 30 problems appear only in Cisco's list and 257 appear only in Oracle's list.
What topics overlap most between Cisco and Oracle?
The most common shared topics between Cisco and Oracle are Array (19 shared questions), Two Pointers (10 shared questions), String (8 shared questions), Hash Table (8 shared questions), Matrix (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Cisco or Oracle?
Cisco has 24 Easy, 50 Medium, and 13 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 Cisco and Oracle?
Start with the 57 shared problems since they cover what both companies ask most often. Then add 20 Cisco-specific and 20 Oracle-specific questions to round out your prep.