Oracle interview questions

Largest Subarray Length K

Given an array and integer k, find the contiguous subarray of length k that maximizes a specified metric (commonly the sum); this is an easy…

Companies: Oracle

Last reported Jul 2026

Maximum Number of Events That Can Be Attended

Given up to 1e5 intervals [start,end] where you can attend an event on any integer day within its range but only one event per day…

Companies: Oracle

Last reported Jul 2026

Reverse Substrings Between Each Pair of Parentheses

Given a balanced string of lowercase letters and parentheses, reverse the substrings inside each matched pair from the innermost outward and return the resulting string…

Companies: Oracle

Last reported Jul 2026

Describe a time when you took an unpopular stance in a meeting with peers and your leader.

Companies: Oracle, Amazon, Meta

Last reported Jul 2026

Design a system from your own experience

Present and walk through the design of a real system you have previously worked on, explaining your architectural decisions, trade-offs, and how you addressed key…

Companies: Oracle, Amazon, Microsoft, OpenAI +1

Last reported Jul 2026

Meeting Room Scheduling - Minimum Rooms Required

Given a list of meeting time intervals, determine the minimum number of conference rooms required so that no meetings overlap. This may involve handling 'Do…

Companies: Oracle, Bloomberg, Google

Last reported Jul 2026

Meeting Rooms II

Given a list of meeting time intervals, determine the minimum number of conference rooms required so that no meetings overlap. The core challenge is computing…

Companies: Oracle, Amazon, Apple, Google +9

Array · Greedy · Heap (Priority Queue) · Prefix Sum

Last reported Jul 2026

Tell me about a time when you had to balance the needs of the customer with the needs of the business.

Companies: Oracle, Amazon, Microsoft, Modular

Last reported Jul 2026

Tell me about a time you championed an idea, initiative, or person that others were hesitant about

Companies: Oracle, Google

Last reported Jul 2026

Tell me about a time you took responsibility for a project

Companies: Oracle, Meta

Last reported Jul 2026

What are the proudest things you have achieved in the past couple of years, either professionally or personally

Companies: Oracle, Spotify

Last reported Jul 2026

What project are you most proud of?

Companies: Oracle, Adyen, Amazon, Anthropic +37

Last reported Jul 2026

Design an In-Memory File System with cd, ls, and File Lookup

Design a file system that supports basic operations including file lookup, directory navigation (cd command), and directory listing (ls command).

Companies: Oracle, Anchorage Digital

Last reported Jul 2026

Design a cloud storage system like Amazon S3

Design a scalable cloud storage service that allows users to upload, download, and manage files with high availability and durability. The system should support features…

Companies: Oracle, Amazon, Cohesity, Coupang +3

Last reported Jun 2026

Sliding Window Maximum

Given an integer array and a window size k, return the maximum value for each contiguous subarray (sliding window) as it moves one step to…

Companies: Oracle, Amazon, Bloomberg, D. E. Shaw +7

Array · Heap (Priority Queue) · Monotonic Queue · Queue

Last reported Jun 2026

Tell me about a time when you had disagreements with your colleagues

Companies: Oracle, Amazon, Anthropic, Meta +2

Last reported Jun 2026

Campus Bikes

Given positions of workers and bikes on a 2D grid, assign each worker a distinct bike to minimize the total Manhattan distance (return the bike…

Companies: Oracle

Last reported May 2026

Evaluate Subjective and Nondeterministic Agent Outputs

Companies: Oracle

ML System Design

Last reported May 2026

Design a System Metrics Monitoring and Alerting Platform

Design a metrics monitoring platform that collects performance data (CPU, memory, throughput) from hundreds of thousands of servers, allows users to set threshold-based alerts…

Companies: Oracle, Amazon, Databricks, Digitalocean +10

Last reported Apr 2026

Design a Calendar System

Design a calendar system that allows users to register, manage their schedules, and view other people's availability and free/busy times.

Companies: Oracle, LinkedIn, Microsoft

Last reported Mar 2026

Design Google Calendar

Local-time recurrence, bounded free/busy queries, invitation state, and reminders that remain correct when schedules change.

Companies: Oracle, Amazon, Apple, Google +3

event-driven · idempotency · recurrence · scheduling

Last reported Mar 2026

Group Anagrams

Group the input strings into lists of anagrams — i.e., strings that contain the same multiset of letters — and return the groups in any…

Companies: Oracle, Amazon, Apple, Arize Ai +14

Array · Hash Table · Sorting · String

Last reported Mar 2026