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Explore questions associated with Oracle. Review the source details, then use the workspace for code, notes, and diagrams.
123 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · ML system design · Object-oriented design · System design
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Design an online healthcare platform that allows users to access medical records based on their permission levels and view educational video tutorials. The system should…
Companies: Oracle
Last reported Dec 2025
Count the number of distinct monotonic paths from the top-left to the bottom-right of an m×n grid when you may only move right or down…
Companies: Oracle, Amazon, Meta, Microsoft
Last reported Nov 2025
Date-range inventory: atomic multi-night reservations, expiring holds, stale search results, and payment races.
Companies: Oracle, Airwallex, Amazon, Booking.com +10
concurrency · idempotency · inventory-management · payments
Last reported Nov 2025
Given a binary grid, count how many distinct island shapes (connected components of 1s via 4-directional adjacency) appear, treating two islands as identical if they…
Companies: Oracle, Anduril, TikTok
Array · Breadth-First Search · Depth-First Search · Hash Function
Last reported Nov 2025
Find the length of the longest contiguous "mountain" subarray — a strictly increasing sequence immediately followed by a strictly decreasing sequence with length ≥ 3…
Companies: Oracle, TikTok
Array · Dynamic Programming · Enumeration · Two Pointers
Last reported Nov 2025
Arrange the characters of a string into a zigzag pattern across numRows and then read the rows sequentially to produce the converted string. The core…
Companies: Oracle, Amazon, Bloomberg, Google +1
String
Last reported Nov 2025
Companies: Oracle, Lyft, Meta
Last reported Nov 2025
Companies: Oracle, Amazon, Bloomberg, Google +2
Linked List · Math · Recursion
Last reported Oct 2025
Design a real-time commenting system that allows users to view and post comments instantly while watching live videos or browsing posts across Meta platforms. The…
Companies: Oracle, Amazon, Bloomberg, Figma +3
Last reported Oct 2025
Given a binary tree with integer node values, calculate path sums where odd-valued nodes trigger alternate node summation and even-valued nodes sum all nodes to…
Companies: Oracle
Last reported Oct 2025
Design a system that efficiently retrieves top-k items (songs, videos, hashtags, etc.) based on user activity or engagement metrics within specified time windows. The system…
Companies: Oracle, Amazon, Atlassian, Bloomberg +10
Last reported Oct 2025
Design a system that allows users to basically google docs but for healthcare industry so need to handle compliance along with the collaborative feature as…
Companies: Oracle, Licious
Last reported Sep 2025
Millions of listeners need fast, reliable audio despite network changes and concurrent updates to personal libraries.
Companies: Oracle, Amazon, Databricks
access-control · audio-durability-and-scale · consistency · content-delivery
Last reported Sep 2025
Companies: Oracle, Google, Meta, NVIDIA +2
Last reported Sep 2025
Given tokens and initial power, you can either spend power to gain score by playing small tokens face-up or spend score to gain power by…
Companies: Oracle
Last reported Aug 2025
Companies: Oracle, Amazon, Anthropic, Canva +10
Last reported Aug 2025
Companies: Oracle, Amazon, Anthropic, Capital One +6
Last reported Aug 2025
Companies: Oracle, Amazon, Apple, Bloomberg +11
Last reported Aug 2025
Companies: Oracle, Adyen, Airbnb, Amazon +31
Last reported Aug 2025
Implement a function that converts a Markdown-formatted string into its equivalent HTML representation. Handle common Markdown constructs such as headers (# H1, ## H2), bold…
Companies: Oracle
Last reported Aug 2025
Design a system that allows users to view real-time traffic conditions, congestion levels, and road status across a city by collecting and processing data from…
Companies: Oracle, Google, Uber
Last reported Jul 2025
Given an integer array and k, return the k most frequent elements — the core challenge is to count element frequencies and extract the top-k…
Companies: Oracle, Amazon, Bloomberg, Google +9
Array · Bucket Sort · Counting · Divide and Conquer
Last reported Jul 2025
Design a distributed caching system that can serve data with low latency across multiple geographic locations, handling cache misses, replication, and scaling to support…
Companies: Oracle, Amazon, Google, Meta +2
Last reported May 2025
Describe the key metrics your team is responsible for tracking and owning. What are your current goals, and how do you measure success against them?
Companies: Oracle, Chime
Last reported Apr 2025
Companies: Oracle, Kiln, Meta, Stripe
Last reported Apr 2025