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17 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Product and business · System design
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Given two strings, determine if they are blanagrams of each other. Two words are blanagrams if they have the same length and can be transformed…
Companies: Okta
Last reported Nov 2026
Companies: Okta, Amazon, Google, Meta
Last reported Nov 2026
Design an authentication system that detects when a user signs in from a new device and prompts them to verify their identity using multi-factor authentication…
Last reported Nov 2026
Companies: Okta
System Design · System Design Fundamentals
Last reported Nov 2026
Companies: Okta, Amazon, Anduril, Checkout +4
Last reported Oct 2026
Companies: Okta, Oracle
Last reported Oct 2026
Design a payment reconciliation system that receives settlement files from multiple banks in varying formats and frequencies, reconciles them against recorded transactions from…
Companies: Okta
Last reported Oct 2026
Companies: Okta
Authentication & Authorization · System Design
Last reported Oct 2026
Implement a thread-safe `BankingServiceImpl` class that satisfies a `BankingService` interface with deposit and withdraw operations backed by a `ConcurrentHashMap` repository…
Companies: Okta
Last reported Oct 2026
Design a job scheduling system that allows users to schedule jobs, check job status, cancel scheduled jobs, and receive email notifications when jobs complete or…
Companies: Okta, Meta
Last reported Sep 2026
Given numCourses and prerequisite pairs, return any ordering of courses that satisfies all prerequisites or an empty array if impossible — this is essentially computing…
Companies: Okta, Amazon, Anduril, Apple +11
Breadth-First Search · Depth-First Search · Graph Theory · Topological Sort
Last reported Jun 2026
Design a Bank class that maintains 1-indexed account balances and supports transfer, deposit, and withdraw operations; each operation must validate account indices and (for…
Companies: Okta, Capital One, Coinbase, OpenAI +1
Last reported Jun 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: Okta, Airbnb, Apple, Autodesk +25
System Design
Last reported Feb 2026
Read-heavy key-value service: unique short-code generation, hot-key caching, redirect semantics.
Companies: Okta, Amazon, Anduril, Apple +26
API Design · caching · hot-keys · http-redirects
Last reported Jan 2026
Given a sorted list of words in an unknown alphabet, infer the relative ordering of characters by deriving precedence constraints between first differing letters, then…
Companies: Okta, Amazon, Bloomberg, Google +3
Array · Breadth-First Search · Depth-First Search · Directed Acyclic Graph
Maintain dynamic collections to (1) return the cheapest up-to-5 shops that have an unrented copy of a given movie and (2) report the cheapest up-to-5…
Companies: Okta, Amazon
Array · Design · Hash Table · Heap (Priority Queue)
Design a data structure for a multiset that supports insert(val) (adding even duplicate occurrences), remove(val) (removing a single occurrence), and getRandom() (returning an…
Companies: Okta, CrowdStrike, LinkedIn
Array · Design · Hash Table · Math