2026 & 2027 Tech OA & Interview Questions
🏢 Full company list (456+) — click to expand
Abnormal Security, Abridge, Accenture, Addepar, Adobe, Adyen, Affirm, Agoda, Airbnb, Airbyte, Airtable, Airwallex, Akuna, Akuna Capital, Alarm.com, Alchemy, Alpaca, Amazon, Ambience Healthcare, AMD, American Express, amo, Amperity, Anchorage, Anduril, Anrok, Anthropic, Apple, Applied Intuition, Arista Networks, Asana, Assort Health, Astrotalk, AT&T, Atlassian, Atlys, Attentive, Aurora Innovation, Autodesk, Axon, Barclays, Baseten, Benchling, Better.com, Bilt Rewards, BitGo, Blackrock, Blinkit, Bloomberg, Bloomberg LP, BNP, BNSF Railway, BNY Mellon, Bobyard, Booking.com, Boston Consulting Group, Box, Braze, Brex, Broccoli AI, ByteDance, Candid Health, Canva, Capgemini, Capillary Technologies, Capital One, Careem, Carta, Cashfree Payments, Cerebras, Chainalysis, Character.AI, Charta Health, Checkr, Chicago Trading, Chicago Trading Company, Chubb, Circle, Cisco, Citadel, Clay, ClearTax, Clickhouse, ClickUp, Clio, Clipboard Health, Cloudflare, Coalition, Cockroach Labs, Codeium, Cognitiv, Cohere, Coinbase, CoinDCX, College Vine, Commure, Commvault, Compass International Holdings, Concentric AI, Confluent, CoreWeave, Coupa Software, Coupang, Cresta, CrowdStrike, Crusoe, Cursor, Cvent, Databricks, Datadog, DatologyAI, David AI, DE Shaw, Decagon, Deliveroo, Dell Technologies, Deloitte, Deutsche Bank, DigitalOcean, Discord, Disney Careers, Distyl AI, DocuSign, DoorDash, Dropbox, DRW, DTCC, Ease, Eat Club, eBay, Edge, Eightfold, Elastic, ElevenLabs, Epam, Epic, Epify, Ericsson, Etched, EvenUp, Expedia, FactSet, FamPay, Figma, Fireworks AI, Fivetran, Flexport, FlexTrade, Flipkart, FluidStack, Fortinet, Fox Corporation, Freshworks, FurtherAI, Gatik AI, GE Vernova, Gecko Robotics, Geico, General Motors, Geneva Trading, GEP, Get My Parking, Giga, GitHub, Glean, Globalization Partners, Gojek, Goldman Sachs, GoodScore, Google, Grab, Grammarly, Groww, Grubhub, Guidewire, Gusto, HackerRank, Hadrian, Harness, Hartford Financial Services, Harvey, Headlands, Headlands Technologies, Headway, Hebbia, Highspot, HSBC, Hudson River Trading, Hyper Verge, HyperVerge, IBM, IDFC, Illumio, IMC, IMC Trading, Indeed, Infosys, InMobi, Instacart, Intuit, Ironclad, IXL Learning, Jane Street, JioStar, JP Morgan, JP Morgan Chase, JPMorgan Chase, Juniper Square, Juspay, Kalshi, Karat, Kaseya, Keychain, Kickdrum, Klaviyo, Kotak Mahindra Bank, Lambda, LangChain, Latent, Legora, Lenskart, LinkedIn, LiveKit, Lloyds Banking Group, Lokal, London Stock Exchange, Luma AI, Lyft, MakeMyTrip.com, Marshall Wace, Mastercard, MathWorks, Matroid, Maven Clinic, Maven Securities, McKinsey & Company, Medallion, Meesho, Mercor, Mercury, Mercury Insurance, Meta, Micro1, Micron Technology, Microsoft, Millennium, Mintlify, Mistral AI, Modal, Modal Learning, Modular, MongoDB, Morgan Stanley, Motive, Moveworks, Mygate, NatWest, Navan, Navi, Netflix, New Relic, Nextdoor, Nike, Inc., Ninja Van, Notion, Nubank, Nuro, Nutanix, Nvidia, NxtPe, Nykaa, Observer.AI, Odoo, Okta, Old Mission, Omnissa, Onehouse, OnePay, OneTrust, Onix, OpenAI, Opendoor, Optimus Information, Optiver, Oracle, Oscar Health, Otter.ai, Oura, Pace Stock Broking Services, Palantir, Patreon, Paypal, PayPay, Paytm, PeopleStrong, Perplexity AI, Persona, PhonePe, Physical Intelligence, Pinecone, Pinterest, Plaid, Point72, PostHog, Postman, Profound, Publicis Sapients, Pure Storage, QRT, Qualified Health AI, Quince, Quora, Ramp, Razorpay, Reddit, RedNote, Reducto, Remitly, Render, Replit, Retell AI, Retool, Revolut, Rippling, Rivian, Robinhood, Roblox, Rogo, Roku, Rubrik, Runloop, Runway, Rupeek, Rurik, Safe Security, Salesforce, SambaNova Systems, Samsara, Samsung, SAP, Sarvam AI, SavantLabs, Scale AI, Scribd, Securonix, SeekOut, SentinelOne, Sentry, ServiceNow, Sesame, Shield AI, Shopify, Siemens, Sierra, Sig, Skydio, Skyscanner, Slack, Snap Inc., Snorkel AI, Snowflake, Sofi, SpaceX, Sphere, Splunk, Spotify, Spotnana, Sprinter Health, SquadStack.ai, Square, Squarepoint, Squarepoint Capital, Stable Money, StackAdapt, State Farm, Strala, Strava, Stripe, Sumo Logic, Suno, Supabase, Superhuman, Susquehanna International Group, Susquehanna International Group (SIG), Swiggy, Syfe, Target, TCS, Tekion, Temporal, Temu, Tennr, Teradata, Tesla, The D. E. Shaw Group, The D.E. Shaw Group, The Trade Desk, The Voleon Group, The Walt Disney Company, ThoughtSpot, TikTok, Toast, Together AI, Toptal, Toshiba, Trade Desk, Trend Micro, Twilio, Twitch, Two Sigma, Uber, Uber Freight, UiPath, Unity, Upstart, Urban Company, Valon, Vanguard, Vanta, Vercel, Verisk, Verkada, Visa, Waabi, Walleye Capital, Walmart, Walmart Labs, Wayfair, Waymo, Wayve, Wells Fargo, WeRide, Wex, Whatnot, Wise, Wolverine Trading, Wonderful, Workday, World Wide Technology, Xperi, YahoO, Yelp, Ziina, Zip, Zipline, ZipRecruiter, Zolando, ZoloStays, Zomato / Eternal, Zoom, ZoomInfo, Zoox, Zopsmart, Zorvyn, ZS, Zscaler.
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🗂️ Question Bank
Newest first · 🔥 2 weeks · 🆕 45 days
Formats: Coding (3,755) · SQL (81) · System design (608) · Low-level design (180) · AI coding (92)
[p]: assets/practice-button.svg
Page 1 · Next → | Company | OA / Interview Question | Format | Practice | Updated | | :-- | :-- | :-- | :-: | :-- | |Pinterest|Find Local Maxima in Sensor Data|Coding|[![Practice][p]](https://www.fastprep.io/problems/pinterest-find-local-maxima)|🔥 Oct 21, 2026| |Pinterest|Gradient Descent Linear Regression Predictions|Coding|[![Practice][p]](https://www.fastprep.io/problems/pinterest-gradient-descent-linear-regression)|🔥 Oct 21, 2026| |Pinterest|Decision Tree Classifier from Scratch|Coding|[![Practice][p]](https://www.fastprep.io/problems/pinterest-decision-tree-classifier)|🔥 Oct 21, 2026| |Google|Robot Assembly Line Conflicts|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-robot-assembly-line-conflicts)|🔥 Oct 20, 2026| |Amazon|Climbing Stairs|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-climbing-stairs)|🔥 Oct 20, 2026| |Google|Periodic-Color Binary Forest Roots|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-periodic-color-binary-forest-roots)|🔥 Oct 20, 2026| |Dell Technologies|Departments Without Employees|SQL|[![Practice][p]](https://www.fastprep.io/problems/dell-departments-without-employees)|🔥 Oct 20, 2026| |Dell Technologies|Find All Pythagorean Triplets|Coding|[![Practice][p]](https://www.fastprep.io/problems/dell-pythagorean-triplets)|🔥 Oct 20, 2026| |Dell Technologies|First Non-Repeated Character|Coding|[![Practice][p]](https://www.fastprep.io/problems/dell-first-non-repeated-character)|🔥 Oct 20, 2026| |Qualys|Find the Entry of a Linked-List Cycle|Coding|[![Practice][p]](https://www.fastprep.io/problems/qualys-linked-list-cycle-entry)|🔥 Oct 20, 2026| |Qualys|Valid Parentheses|Coding|[![Practice][p]](https://www.fastprep.io/problems/qualys-valid-parentheses)|🔥 Oct 20, 2026| |Qualys|Rotate an Array Right by K Steps|Coding|[![Practice][p]](https://www.fastprep.io/problems/qualys-rotate-array)|🔥 Oct 20, 2026| |Qualys|Delete a Doubly Linked-List Node at a Position|Coding|[![Practice][p]](https://www.fastprep.io/problems/qualys-doubly-linked-list-delete-at-position)|🔥 Oct 20, 2026| |Qualys|Insert a Doubly Linked-List Node at a Position|Coding|[![Practice][p]](https://www.fastprep.io/problems/qualys-doubly-linked-list-insert-at-position)|🔥 Oct 20, 2026| |Qualys|Implement Binary Search|Coding|[![Practice][p]](https://www.fastprep.io/problems/qualys-binary-search)|🔥 Oct 20, 2026| |Stripe|Colander Debugging Mock: Repair Error Aggregation|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/mock-stripe-colander-aggregation)|🔥 Oct 20, 2026| |Amazon|Aggressive Cows|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-aggressive-cows)|🔥 Oct 20, 2026| |Amazon|Course Schedule II|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-course-schedule-ii)|🔥 Oct 20, 2026| |Chubb|Minimize the Maximum Array Element|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-minimize-maximum-array-element)|🔥 Oct 19, 2026| |Chubb|Maximize Revenue from Selling Items|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-maximize-revenue-from-selling-items)|🔥 Oct 19, 2026| |Chubb|Minimize the Sum of Prefix Costs|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-minimum-distinct-prefix-cost)|🔥 Oct 19, 2026| |Chubb|Count Valid Pairs|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-count-valid-divisible-interval-pairs)|🔥 Oct 19, 2026| |Chubb|Maximum Element After Rotations|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-max-element-indexes-after-rotations)|🔥 Oct 19, 2026| |Chubb|Second-Highest Salary|SQL|[![Practice][p]](https://www.fastprep.io/problems/chubb-second-highest-salary)|🔥 Oct 19, 2026| |Chubb|Reverse a Linked List|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-reverse-linked-list)|🔥 Oct 19, 2026| |Chubb|Unique Element Among Pairs|Coding|[![Practice][p]](https://www.fastprep.io/problems/chubb-unique-element-among-pairs)|🔥 Oct 19, 2026| |Snowflake|Declarative Cluster Control Plane|System design|[![Practice][p]](https://www.fastprep.io/system-design/declarative-cluster-control-plane)|🔥 Oct 19, 2026| |Snowflake|Design a Resilient Third-Party Token Client|System design|[![Practice][p]](https://www.fastprep.io/system-design/resilient-third-party-token-client)|🔥 Oct 19, 2026| |Snowflake|Design a Shared User Quota Authority|System design|[![Practice][p]](https://www.fastprep.io/system-design/shared-user-quota-authority)|🔥 Oct 19, 2026| |Snowflake|Design an Application Logging Client Library|System design|[![Practice][p]](https://www.fastprep.io/system-design/application-logging-client-library)|🔥 Oct 19, 2026| |Snowflake|Design an Auditable Event Trail Service|System design|[![Practice][p]](https://www.fastprep.io/system-design/auditable-event-trail-service)|🔥 Oct 19, 2026| |Snowflake|Fault-Tolerant Batch Dataflow Engine|System design|[![Practice][p]](https://www.fastprep.io/system-design/fault-tolerant-batch-dataflow-engine)|🔥 Oct 19, 2026| |Snowflake|Resilient REST Call Abstraction|System design|[![Practice][p]](https://www.fastprep.io/system-design/resilient-rest-call-abstraction)|🔥 Oct 19, 2026| |Snowflake|Versioned Query-DAG Result Cache|System design|[![Practice][p]](https://www.fastprep.io/system-design/versioned-query-dag-result-cache)|🔥 Oct 19, 2026| |Amazon|Binary Tree Spiral Level Order|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-binary-tree-spiral-level-order)|🔥 Oct 18, 2026| |Amazon|Number of Islands|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-number-of-islands)|🔥 Oct 18, 2026| |Unattributed|Design a Medicine Delivery Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/medicine-delivery-platform)|🔥 Oct 18, 2026| |Amazon|Minimum Cost of Left and Right Propagation|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-minimum-left-right-propagation-cost)|🔥 Oct 18, 2026| |Google|Dynamic Point-in-Range Queries|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-dynamic-point-range-coverage)|🔥 Oct 18, 2026| |Google|Biggest Number From Digits|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-biggest-number-from-digits)|🔥 Oct 18, 2026| |Stripe|Repair Nested Record Value Normalization|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/stripe-nested-value-normalization)|🔥 Oct 17, 2026| |Agoda|Design a Flight Search and Booking Aggregator|System design|[![Practice][p]](https://www.fastprep.io/system-design/flight-search-booking-aggregation-platform)|🔥 Oct 17, 2026| |Agoda|Design a Supplier Booking-Pull Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/supplier-booking-pull-platform)|🔥 Oct 17, 2026| |Amazon|Design a Package Delivery Assignment Domain|Low-level design|[![Practice][p]](https://www.fastprep.io/low-level-design/package-delivery-assignment-domain)|🔥 Oct 17, 2026| |Agoda|Molecular Weight of a Grouped Formula|Coding|[![Practice][p]](https://www.fastprep.io/problems/agoda-molecule-weight-parser)|🔥 Oct 17, 2026| |Agoda|Sort Ones, Twos, and Threes In Place|Coding|[![Practice][p]](https://www.fastprep.io/problems/agoda-sort-ones-twos-threes)|🔥 Oct 17, 2026| |Amazon|Next Greater Element I|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-next-greater-element-i)|🔥 Oct 17, 2026| |Amazon|Search in a Rotated Sorted Array|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-search-rotated-sorted-array)|🔥 Oct 17, 2026| |Google|Peak Task Concurrency Intervals|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-peak-task-concurrency-intervals)|🔥 Oct 17, 2026| |Google|Find a Valid Course Completion Order|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-course-completion-order)|🔥 Oct 17, 2026| |Google|Count Filename Pairs Related by One Swap|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-one-swap-filename-pairs)|🔥 Oct 17, 2026| |Amazon|Dijkstra Shortest Paths in a Weighted Undirected Graph|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-shortest-path-weighted-graph)|🔥 Oct 16, 2026| |Amazon|Find Word-Multiset Windows|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-word-multiset-window-search)|🔥 Oct 16, 2026| |Amazon|LFU Cache|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-lfu-cache)|🔥 Oct 16, 2026| |eBay|Gas Station|Coding|[![Practice][p]](https://www.fastprep.io/problems/ebay-gas-station)|🔥 Oct 16, 2026| |eBay|Onion-Peel Layers of a Binary Tree|Coding|[![Practice][p]](https://www.fastprep.io/problems/ebay-onion-peel-tree-traversal)|🔥 Oct 16, 2026| |HackerRank|Classify Password Strength|Coding|[![Practice][p]](https://www.fastprep.io/problems/hackerrank-password-strength-checker)|🔥 Oct 16, 2026| |Safe Security|Merge Intervals|Coding|[![Practice][p]](https://www.fastprep.io/problems/safe-security-merge-intervals)|🔥 Oct 16, 2026| |Pace Stock Broking Services|Minimum Cost for a Target Weight|Coding|[![Practice][p]](https://www.fastprep.io/problems/pace-stock-minimum-power-of-two-weight-cost)|🔥 Oct 16, 2026| |InMobi|Validate a Bracket Sequence|Coding|[![Practice][p]](https://www.fastprep.io/problems/inmobi-valid-parentheses-stack)|🔥 Oct 16, 2026| |Microsoft|Balance a Chemical Equation|Coding|[![Practice][p]](https://www.fastprep.io/problems/microsoft-balance-chemical-equation)|🔥 Oct 16, 2026| |Microsoft|Minimum Changes for a Beautiful String|Coding|[![Practice][p]](https://www.fastprep.io/problems/microsoft-minimum-beautiful-string-operations)|🔥 Oct 16, 2026| |Klaviyo|AI Engineer Intern Mock: Customer Message Classifier|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/mock-ai-intern-customer-message-classifier)|🔥 Oct 16, 2026| |Klaviyo|AI Engineer Intern Mock: Explain and Extend Your AI Project|System design|[![Practice][p]](https://www.fastprep.io/system-design/mock-ai-intern-project-retrospective)|🔥 Oct 16, 2026| |Klaviyo|AI Engineer Intern Mock: Repair a Classifier Cache|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/mock-ai-intern-classifier-cache)|🔥 Oct 16, 2026| |Klaviyo|AI Engineer Intern Mock: Search Customer Messages|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/mock-ai-intern-customer-message-search)|🔥 Oct 16, 2026| |Rippling|Comment Word and Substring Search|Coding|[![Practice][p]](https://www.fastprep.io/problems/rippling-comment-word-and-substring-search)|🔥 Oct 16, 2026| |OpenAI|Design a Cloud Coding Workspace|System design|[![Practice][p]](https://www.fastprep.io/system-design/cloud-coding-workspace)|🔥 Oct 16, 2026| |DoorDash|Food Review System|System design|[![Practice][p]](https://www.fastprep.io/system-design/food-review-system)|🔥 Oct 16, 2026| |Amazon / Lyft / Google / Pinterest / Snowflake|Design a Web Crawler|System design|[![Practice][p]](https://www.fastprep.io/system-design/web-crawler)|🔥 Oct 16, 2026| |Apple|Design a Distributed Cache with an Index Database|System design|[![Practice][p]](https://www.fastprep.io/system-design/distributed-cache-with-index-metadata)|🔥 Oct 16, 2026| |OpenAI|Durable Work Queue Operations|Coding|[![Practice][p]](https://www.fastprep.io/problems/openai-durable-work-queue-operations)|🔥 Oct 16, 2026| |DoorDash|Dasher Pay with Store Waits and Peak Hours|Coding|[![Practice][p]](https://www.fastprep.io/problems/doordash-dasher-pay)|🔥 Oct 16, 2026| |Google|Route Pattern Matcher|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-route-pattern-matcher)|🔥 Oct 16, 2026| |Amazon|Dense Matrix Multiplication|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-dense-matrix-multiplication)|🔥 Oct 16, 2026| |Apple|Count Nodes in a Chain|Coding|[![Practice][p]](https://www.fastprep.io/problems/apple-count-chain-nodes)|🔥 Oct 16, 2026| |Apple|Run-Length Decoding|Coding|[![Practice][p]](https://www.fastprep.io/problems/apple-run-length-decoding)|🔥 Oct 16, 2026| |Applied Intuition|File-Backed Dense Game of Life|Coding|[![Practice][p]](https://www.fastprep.io/problems/applied-intuition-file-backed-dense-game-of-life)|🔥 Oct 16, 2026| |Cresta|Decode Words with Anagram Keys|Coding|[![Practice][p]](https://www.fastprep.io/problems/cresta-anagram-message-decoding)|🔥 Oct 16, 2026| |Cresta|Find a File in a Directory Snapshot|Coding|[![Practice][p]](https://www.fastprep.io/problems/cresta-filesystem-absolute-path-search)|🔥 Oct 16, 2026| |Cresta|Maximum Suffix–Prefix Overlap|Coding|[![Practice][p]](https://www.fastprep.io/problems/cresta-maximum-suffix-prefix-overlap)|🔥 Oct 16, 2026| |Cresta|Leaves Remaining After Wind|Coding|[![Practice][p]](https://www.fastprep.io/problems/cresta-wind-driven-leaf-grid)|🔥 Oct 16, 2026| |LinkedIn|Randomized String Multiset|Coding|[![Practice][p]](https://www.fastprep.io/problems/linkedin-randomized-string-multiset)|🔥 Oct 16, 2026| |NVIDIA|Filter Paginated Medical Records|Coding|[![Practice][p]](https://www.fastprep.io/problems/nvidia-paginated-medical-record-filter)|🔥 Oct 16, 2026| |Snowflake|Minimum N-ary Tree Depth Deletions|Coding|[![Practice][p]](https://www.fastprep.io/problems/snowflake-minimum-nary-tree-deletions)|🔥 Oct 16, 2026| |Snowflake|Tree Height After Child Promotion|Coding|[![Practice][p]](https://www.fastprep.io/problems/snowflake-tree-height-after-child-promotion)|🔥 Oct 16, 2026| |Susquehanna International Group (SIG)|Finite Weighted Outcome Expectation|Coding|[![Practice][p]](https://www.fastprep.io/problems/susquehanna-finite-weighted-outcome-expectation)|🔥 Oct 16, 2026| |Susquehanna International Group (SIG)|Four-by-Four Boundary Grid|Coding|[![Practice][p]](https://www.fastprep.io/problems/susquehanna-four-by-four-boundary-grid)|🔥 Oct 16, 2026| |Susquehanna International Group (SIG)|Three-Speaker Truth Consistency|Coding|[![Practice][p]](https://www.fastprep.io/problems/susquehanna-three-speaker-truth-consistency)|🔥 Oct 16, 2026| |Postman / Uber Freight / LinkedIn / Safe Security|Design a Calendar Event Collaboration System|System design|[![Practice][p]](https://www.fastprep.io/system-design/calendar-event-collaboration-system)|🔥 Oct 16, 2026| |Broccoli AI|Design a Cross-Network Social Feed|System design|[![Practice][p]](https://www.fastprep.io/system-design/cross-platform-social-feed)|🔥 Oct 16, 2026| |Amazon|Design a Vaccination Appointment Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/vaccination-appointment-platform)|🔥 Oct 16, 2026| |Amazon|Design a Delivery Slot Booking Domain|Low-level design|[![Practice][p]](https://www.fastprep.io/low-level-design/delivery-slot-booking-domain)|🔥 Oct 16, 2026| |Amazon|Top K Frequent Elements|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-top-k-frequent-elements)|🔥 Oct 16, 2026| |Amazon|Lowest Common Ancestor in an N-ary Tree|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-nary-tree-lowest-common-ancestor)|🔥 Oct 16, 2026| |Nykaa / Headway|Design a Cart-to-Order Inventory Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/cart-to-order-inventory-platform)|🔥 Oct 16, 2026| |Flipkart|Implement a Distributed Task Scheduler|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/flipkart-distributed-task-scheduler)|🔥 Oct 16, 2026| |Google|Longest Alternating Subarray After One Deletion|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-longest-alternating-subarray-one-deletion)|🔥 Oct 16, 2026| |Google|Final File Paths After Sequential Moves|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-final-file-paths-after-moves)|🔥 Oct 16, 2026| |Google|Evaluate Sequential Variable Assignments|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-evaluate-sequential-variable-assignments)|🔥 Oct 16, 2026| |Google|Course Schedule Cycle Detection|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-course-schedule-cycle-detection)|🔥 Oct 16, 2026| |Google|Make an Array Non-Decreasing With One Modification|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-non-decreasing-array-one-modification)|🔥 Oct 16, 2026| |McKinsey & Company|Weekend Appointments for Consular Services Rescheduling|SQL|[![Practice][p]](https://www.fastprep.io/problems/mckinsey-weekend-appointments)|🔥 Oct 15, 2026| |TikTok|Find Local Maxima in Sensor Data|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-find-local-maxima)|🔥 Oct 15, 2026| |TikTok|Bagging Classifier with Supplied Decision Trees|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-bagging-classifier)|🔥 Oct 15, 2026| |TikTok|Cosine k-Means Clustering|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-cosine-k-means-clustering)|🔥 Oct 15, 2026| |TikTok|Count Eligible Package Codes|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-count-eligible-package-codes)|🔥 Oct 15, 2026| |TikTok|Correct Sensor Readings|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-correct-sensor-readings)|🔥 Oct 15, 2026| |TikTok|Bouncing Diagonal Weights|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-bouncing-diagonal-weights)|🔥 Oct 15, 2026| |TikTok|Arithmetic Triplets After Queries|Coding|[![Practice][p]](https://www.fastprep.io/problems/tiktok-arithmetic-triplets-after-queries)|🔥 Oct 15, 2026| |Anthropic|Design a Gang-Scheduled GPU Inference Pool|System design|[![Practice][p]](https://www.fastprep.io/system-design/gang-scheduled-gpu-inference-pool)|🔥 Oct 15, 2026| |LinkedIn|Design a Personalized Recruiter Outreach Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/personalized-recruiter-outreach-platform)|🔥 Oct 15, 2026| |Google / ByteDance|Design Fraud-Risk Scoring for Protected Actions|System design|[![Practice][p]](https://www.fastprep.io/system-design/fraud-risk-scoring-for-protected-actions)|🔥 Oct 15, 2026| |StackAdapt|Repair Corrupted Grid Digit Recognition|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/stackadapt-corrupted-grid-digit-recognition)|🔥 Oct 15, 2026| |Google|Count Score Categories|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-count-score-categories)|🔥 Oct 15, 2026| |Google|Book Reading Evenings|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-book-reading-evenings)|🔥 Oct 15, 2026| |ByteDance|Implement Multi-Head Attention|Coding|[![Practice][p]](https://www.fastprep.io/problems/bytedance-implement-multi-head-attention)|🔥 Oct 15, 2026| |Harvey|Spreadsheet Formula Evaluator|Coding|[![Practice][p]](https://www.fastprep.io/problems/harvey-spreadsheet-formula-evaluator)|🔥 Oct 15, 2026| |Meta|Valid Word Abbreviation|Coding|[![Practice][p]](https://www.fastprep.io/problems/meta-valid-word-abbreviation)|🔥 Oct 15, 2026| |Amazon|Find All People with the Secret|Coding|[![Practice][p]](https://www.fastprep.io/problems/amazon-find-all-people-with-secret)|🔥 Oct 15, 2026| |ByteDance|Parse a CSV Record|Coding|[![Practice][p]](https://www.fastprep.io/problems/bytedance-parse-csv-record)|🔥 Oct 15, 2026| |Meta|Count Events in Rolling Minute Windows|Coding|[![Practice][p]](https://www.fastprep.io/problems/meta-rolling-minute-counter)|🔥 Oct 15, 2026| |NVIDIA|Least Frequently Used Cache|Coding|[![Practice][p]](https://www.fastprep.io/problems/nvidia-lfu-cache)|🔥 Oct 15, 2026| |Nykaa / Navi / Atlys|Design a Shared Expense Splitting Service|Low-level design|[![Practice][p]](https://www.fastprep.io/low-level-design/shared-expense-splitting-domain)|🔥 Oct 15, 2026| |DocuSign / Walmart Labs|Design a Resilient E-Commerce Checkout|System design|[![Practice][p]](https://www.fastprep.io/system-design/resilient-ecommerce-checkout)|🔥 Oct 15, 2026| |Databricks|Online Bookseller Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/online-bookseller-platform)|🔥 Oct 15, 2026| |Scale AI|Design an Embedding and Classification API|System design|[![Practice][p]](https://www.fastprep.io/system-design/embedding-and-classification-api)|🔥 Oct 15, 2026| |Databricks|Design a WAL-Backed Batch Log Writer|Low-level design|[![Practice][p]](https://www.fastprep.io/low-level-design/wal-backed-batch-log-writer)|🔥 Oct 15, 2026| |Bloomberg LP / Atlassian|Design a Streaming Top-K Hitters System|System design|[![Practice][p]](https://www.fastprep.io/system-design/streaming-top-k-hitters)|🔥 Oct 15, 2026| |Databricks|Rectangular K-in-a-Row|Coding|[![Practice][p]](https://www.fastprep.io/problems/databricks-rectangular-k-in-a-row)|🔥 Oct 15, 2026| |ByteDance|Apply Affine Array Transformations|Coding|[![Practice][p]](https://www.fastprep.io/problems/bytedance-apply-affine-array-transformations)|🔥 Oct 15, 2026| |College Vine|Root Job with the Largest Total Duration|Coding|[![Practice][p]](https://www.fastprep.io/problems/college-vine-largest-root-job-duration)|🔥 Oct 15, 2026| |Databricks|Top-K Values per Key in MapReduce|Coding|[![Practice][p]](https://www.fastprep.io/problems/databricks-mapreduce-per-key-top-k-values)|🔥 Oct 15, 2026| |Runloop|Choose the Next Minesweeper Action|Coding|[![Practice][p]](https://www.fastprep.io/problems/runloop-minesweeper-bot-next-action)|🔥 Oct 15, 2026| |Walmart Labs|Delayed Job Scheduler|Coding|[![Practice][p]](https://www.fastprep.io/problems/walmart-labs-delayed-job-scheduler)|🔥 Oct 15, 2026| |Walmart Labs|Find the Duplicate Number|Coding|[![Practice][p]](https://www.fastprep.io/problems/walmart-labs-find-duplicate-number)|🔥 Oct 15, 2026| |Walmart Labs|Product of Array Except Self|Coding|[![Practice][p]](https://www.fastprep.io/problems/walmart-labs-product-of-array-except-self)|🔥 Oct 15, 2026| |Coinbase / Goldman Sachs / Robinhood|Design a Brokerage Order Processing System|System design|[![Practice][p]](https://www.fastprep.io/system-design/brokerage-order-processing-system)|🔥 Oct 14, 2026| |Robinhood / Rippling|Large-Input Word Frequency Analysis|System design|[![Practice][p]](https://www.fastprep.io/system-design/large-input-word-frequency-analysis)|🔥 Oct 14, 2026| |Attentive / Oracle / Amperity / Snap Inc. / Waabi / LinkedIn|Design a Time Series Metrics Database|System design|[![Practice][p]](https://www.fastprep.io/system-design/time-series-metrics-database)|🔥 Oct 14, 2026| |Perplexity AI|Design Durable Long-Running Agentic Query Execution|System design|[![Practice][p]](https://www.fastprep.io/system-design/long-running-agentic-query-execution)|🔥 Oct 14, 2026| |Netflix / Google|Design a Grounded Recommendation Chatbot|System design|[![Practice][p]](https://www.fastprep.io/system-design/grounded-recommendation-chatbot)|🔥 Oct 14, 2026| |Lyft / WhatNot|Donation Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/donation-platform)|🔥 Oct 14, 2026| |LinkedIn|Known Words Matching Phone Digits|Coding|[![Practice][p]](https://www.fastprep.io/problems/linkedin-known-words-for-phone-digits)|🔥 Oct 14, 2026| |Rippling|Delivery Cost Tracker|Coding|[![Practice][p]](https://www.fastprep.io/problems/rippling-delivery-cost-tracker)|🔥 Oct 14, 2026| |Capital One|Check Array Arithmetic Expressions|Coding|[![Practice][p]](https://www.fastprep.io/problems/capital-one-check-array-arithmetic-expressions)|🔥 Oct 14, 2026| |Cresta|Dynamic Least-Loaded Job Dispatcher|Coding|[![Practice][p]](https://www.fastprep.io/problems/cresta-dynamic-job-dispatcher)|🔥 Oct 14, 2026| |Stripe|Split Tender Transactions Part 1 - Basic Split Tendering|Coding|[![Practice][p]](https://www.fastprep.io/problems/stripe-split-tender-basic)|🔥 Oct 14, 2026| |Robinhood|Top Ten Most Frequent Words in a Book|Coding|[![Practice][p]](https://www.fastprep.io/problems/robinhood-top-ten-book-word-frequencies)|🔥 Oct 14, 2026| |Decagon|Rolling CSAT Tracker|Coding|[![Practice][p]](https://www.fastprep.io/problems/decagon-rolling-csat-tracker)|🔥 Oct 14, 2026| |Retool|Maximum Profit with Exactly One Stock Transaction|Coding|[![Practice][p]](https://www.fastprep.io/problems/retool-exactly-one-stock-transaction)|🔥 Oct 14, 2026| |Capital One|Rotate Matrix Over Diagonals|Coding|[![Practice][p]](https://www.fastprep.io/problems/capitalone-rotate-matrix-over-diagonals)|🔥 Oct 14, 2026| |Airbnb|Credit Accounts with Scheduled Transfers|Coding|[![Practice][p]](https://www.fastprep.io/problems/airbnb-scheduled-credit-account-ledger)|🔥 Oct 14, 2026| |Applied Intuition|Resolve Variable Equations with Dependency Errors|Coding|[![Practice][p]](https://www.fastprep.io/problems/applied-intuition-equation-dependency-resolution)|🔥 Oct 14, 2026| |Capital One|Arithmetic Triplets After Queries|Coding|[![Practice][p]](https://www.fastprep.io/problems/capital-one-arithmetic-triplets-after-queries)|🔥 Oct 14, 2026| |Capital One|Branch with the Most Files|Coding|[![Practice][p]](https://www.fastprep.io/problems/capital-one-branch-with-most-files)|🔥 Oct 14, 2026| |Coinbase|Scheduled Payments with Account Aliases|Coding|[![Practice][p]](https://www.fastprep.io/problems/coinbase-scheduled-payment-account-resolution)|🔥 Oct 14, 2026| |LinkedIn|Response Time Across a City Grid|Coding|[![Practice][p]](https://www.fastprep.io/problems/linkedin-city-grid-response-time)|🔥 Oct 14, 2026| |LinkedIn|Maximum Consecutive Ones in a Circular Array|Coding|[![Practice][p]](https://www.fastprep.io/problems/linkedin-maximum-consecutive-ones-circular)|🔥 Oct 14, 2026| |LinkedIn|Move the Nth Linked-List Node to the Front|Coding|[![Practice][p]](https://www.fastprep.io/problems/linkedin-move-nth-node-to-front)|🔥 Oct 14, 2026| |LinkedIn|Rank-Based Cache with a Data Source|Coding|[![Practice][p]](https://www.fastprep.io/problems/linkedin-rank-based-data-source-cache)|🔥 Oct 14, 2026| |Perplexity AI|Sort Topic Names by Prefix and Number|Coding|[![Practice][p]](https://www.fastprep.io/problems/perplexity-sort-topic-prefix-and-number)|🔥 Oct 14, 2026| |Retool|Order Sources by Their Dependencies|Coding|[![Practice][p]](https://www.fastprep.io/problems/retool-source-dependency-order)|🔥 Oct 14, 2026| |Salesforce|Find Rows Common to Two Tables|SQL|[![Practice][p]](https://www.fastprep.io/problems/salesforce-intersection-of-two-tables)|🔥 Oct 14, 2026| |Salesforce|Detect a Cycle in a Linked List|Coding|[![Practice][p]](https://www.fastprep.io/problems/salesforce-linked-list-cycle-detection)|🔥 Oct 14, 2026| |Salesforce|Merge Two Sorted Linked Lists|Coding|[![Practice][p]](https://www.fastprep.io/problems/salesforce-merge-two-sorted-linked-lists)|🔥 Oct 14, 2026| |Intuit|Maximum Square-Free Divisor|Coding|[![Practice][p]](https://www.fastprep.io/problems/intuit-maximum-square-free-divisor)|🔥 Oct 14, 2026| |Intuit|Longest Repeated Letter Block with Adjacent Swaps|Coding|[![Practice][p]](https://www.fastprep.io/problems/intuit-longest-repeated-block-adjacent-swaps)|🔥 Oct 14, 2026| |Intuit|Two Tribes from Taller-Person Counts|Coding|[![Practice][p]](https://www.fastprep.io/problems/intuit-two-tribes-taller-count-assignments)|🔥 Oct 14, 2026| |Optiver|Power Cell Bank|Coding|[![Practice][p]](https://www.fastprep.io/problems/optiver-power-cell-bank)|🔥 Oct 14, 2026| |Akuna Capital|Rolling Metrics|Coding|[![Practice][p]](https://www.fastprep.io/problems/akuna-rolling-metrics)|🔥 Oct 14, 2026| |Goldman Sachs|Count Redundant File Backups|Coding|[![Practice][p]](https://www.fastprep.io/problems/goldman-sachs-count-redundant-file-backups)|🔥 Oct 14, 2026| |Confluent|Count Combinations Using Weights One Through K|Coding|[![Practice][p]](https://www.fastprep.io/problems/confluent-count-weight-combinations)|🔥 Oct 14, 2026| |Confluent|Sum Symmetric Pairwise Remainders|Coding|[![Practice][p]](https://www.fastprep.io/problems/confluent-sum-symmetric-pairwise-remainders)|🔥 Oct 14, 2026| |Jane Street|Instrument Stack Language Jumps|Coding|[![Practice][p]](https://www.fastprep.io/problems/jane-street-instrument-stack-language-jumps)|🔥 Oct 14, 2026| |Jane Street|Run a Stack Language Interpreter|Coding|[![Practice][p]](https://www.fastprep.io/problems/jane-street-stack-language-interpreter)|🔥 Oct 14, 2026| |OpenAI / Commvault / Zomato / Eternal / Upstart|Design an Online Chess Platform|System design|[![Practice][p]](https://www.fastprep.io/system-design/online-chess-platform)|🔥 Oct 14, 2026| |Sphere|Design an Address and Date Tax Engine|System design|[![Practice][p]](https://www.fastprep.io/system-design/address-date-tax-engine)|🔥 Oct 14, 2026| |Sphere|Integrate a State Tax API|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/sphere-state-tax-api-integration)|🔥 Oct 14, 2026| |Upstart|Build a Poll and Voting API|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/upstart-poll-voting-api)|🔥 Oct 14, 2026| |College Vine|Calculate a Token-List Expression|Coding|[![Practice][p]](https://www.fastprep.io/problems/college-vine-token-list-calculator)|🔥 Oct 14, 2026| |Jane Street|Code Editor Folding|Coding|[![Practice][p]](https://www.fastprep.io/problems/jane-street-code-editor-folding)|🔥 Oct 14, 2026| |Upstart|Babysitter Quote with Hourly Rates|Coding|[![Practice][p]](https://www.fastprep.io/problems/upstart-babysitter-hourly-quote)|🔥 Oct 14, 2026| |Upstart|Maximum Subarray|Coding|[![Practice][p]](https://www.fastprep.io/problems/upstart-maximum-subarray)|🔥 Oct 14, 2026| |Google|Maximum Task Reward Within a Time Budget|Coding|[![Practice][p]](https://www.fastprep.io/problems/google-task-reward-under-time-budget)|🔥 Oct 14, 2026| |Amazon|Repair Car Publication and Availability|AI coding|[![Practice][p]](https://www.fastprep.io/project-coding/amazon-car-rental-listing-repair)|🔥 Oct 14, 2026| |Globalization Partners / Coupa Software / Adobe|Design and Repair a Thread-Safe Configuration Singleton|Low-level design|[
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