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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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Showing 1–25
Given a binary tree, simulate the process of repeatedly removing all current leaf nodes and recording their values until the tree is empty. Return a…
Companies: Oracle, Amazon, eBay, Google +1
Last reported Oct 2026
Design a remote code execution system similar to platforms like LeetCode, where users can write, submit, and execute code in multiple programming languages in a…
Companies: Oracle
Last reported Oct 2026
Companies: Oracle
System Design
Last reported Oct 2026
Algorithm trade-offs (fixed window, sliding log, sliding counter, token bucket), placement, distributed atomic counting, failure modes.
Companies: Oracle, Amazon, Anthropic, Apple +14
api-gateway · atomicity · Concurrency · Consistency & Availability
Last reported Oct 2026
Design and implement an object-oriented elevator system in Java that models the core functionality of an elevator. Your solution should handle floor requests, movement…
Companies: Oracle
Last reported Oct 2026
Implement an LRUCache that supports O(1) average-time get(key) returning the value or -1 and put(key, value) which inserts or updates a key and, if capacity…
Companies: Oracle, Adobe, Amazon, Anthropic +29
Data Structure Design · Design · Doubly-Linked List · Hash Table
Last reported Sep 2026
Count the number of islands (4-directionally connected components of '1's) in an m×n binary grid. This is a connected-components/flood-fill problem typically solved with…
Companies: Oracle, Amazon, Anduril, Apple +16
Array · Breadth-First Search · Depth-First Search · Matrix
Last reported Sep 2026
Design a distributed job scheduler that can handle high-throughput job processing (10,000+ jobs per second), support both scheduled (cron-based) and ad-hoc job execution…
Companies: Oracle, Airbnb, Apple, Autodesk +25
System Design
Last reported Sep 2026
Given the root of a binary tree, return the diameter — the maximum number of edges on any path between two nodes; the core challenge…
Companies: Oracle, Meta, Roblox
Binary Tree · Depth-First Search · DP on Trees · Tree
Last reported Sep 2026
Companies: Oracle, Amazon, Meta, Roblox +1
Last reported Sep 2026
Companies: Oracle, Amazon, Capital One
Last reported Sep 2026
Companies: Oracle, Amazon, Anduril, Assort +9
Last reported Sep 2026
Question: Tell me about yourself
Companies: Oracle, Adyen, Amazon, Anthropic +13
Last reported Sep 2026
Count word frequencies and return the k most frequent words sorted by descending frequency, breaking ties by lexicographical order. The core challenge is combining frequency…
Companies: Oracle, Apple, Microsoft, Robinhood
Array · Bucket Sort · Counting · Hash Table
Last reported Sep 2026
Given an array of coin costs (with some positions possibly blocked) and a maximum jump length B, find a sequence of jumps from the first…
Companies: Oracle
Last reported Sep 2026
Given a binary tree and two nodes p and q, find their lowest common ancestor (LCA) — the deepest node that has both p and…
Companies: Oracle, Amazon, Apple, Atlassian +6
Binary Lifting · Binary Tree · Depth-First Search · Lowest Common Ancestor
Last reported Sep 2026
Implement a function that parses a CSV-formatted string containing business verification records and validates each record against a set of required fields and formatting rules.
Companies: Oracle, Stripe
Last reported Sep 2026
Find the minimum integer eating speed k such that the total hours required (sum over piles of ceil(piles[i]/k)) is ≤ h; because the required hours…
Companies: Oracle, Amazon, Bloomberg, Coupang +6
Array · Binary Search
Last reported Sep 2026
Given a dependency graph where dependentFlights[x] contains every flight that directly depends on flight x, determine which flights are delayed using a multi-source…
Companies: Oracle
Last reported Aug 2026
Given a list of intervals, merge all overlapping (including touching endpoints) intervals and return the minimal set of non-overlapping intervals that cover them. Key pattern…
Companies: Oracle, Amazon, Antithesis, Apple +16
Array · Quicksort · Sorting
Last reported Aug 2026
Given an array of integers and a target, return the indices of two distinct elements whose values sum to the target (exactly one valid solution…
Companies: Oracle, Amazon, Apple, Bloomberg +13
Array · Hash Table
Last reported Aug 2026
Design an agentic AI platform that allows users to create, deploy, and manage autonomous AI agents capable of executing multi-step tasks, coordinating with other agents…
Companies: Oracle, Google, Target
Last reported Aug 2026
Companies: Oracle, Amazon, Meta, NVIDIA +3
Divide and Conquer · Heap (Priority Queue) · Linked List · Merge Sort
Last reported Aug 2026
Companies: Oracle, Amazon, Trustpilot
Last reported Aug 2026
Determine whether a target word can be formed by a path of horizontally or vertically adjacent cells in an m×n letter grid without reusing a…
Companies: Oracle, Amazon, Glean, Google +3
Array · Backtracking · Depth-First Search · Matrix
Last reported Jul 2026