Pinterest interview practice
Practice from 28 Pinterest-tagged public coding problems, organized only by the stage, topic, difficulty, and recency metadata FastPrep can verify. The broader public catalog also includes 10 system-design exercises, 1 low-level-design exercise.
OA practice path
Build a timed implementation rhythm from prompt to edge cases. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
PIPinterest | Minimize Expression with ParenthesesStringMath | Hard | 1 public reportLast reported Feb 2026 | Practice |
PIPinterest | Bubble ExplosionMatrixGraph | Hard | 1 public reportLast reported Feb 2026 | Practice |
PIPinterest | Travel Distance on ScootersArraySorting | Easy | 1 public reportLast reported Feb 2026 | Practice |
Phone practice path
Practice solving while explaining assumptions, tradeoffs, and complexity. Problems are ranked by repeated public catalog sightings.
18 Pinterest-tagged Phone Screen problems available.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
PIPinterest | Expression Add OperatorsStringBacktracking | Hard | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Delete and Compact a Forest SubtreeArrayTree | Medium | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Mark a Deleted Forest SubtreeArrayTree | Medium | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Reconstruct an Itinerary Without a Fixed StartGraphSorting | Hard | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Escape Room LeaderboardArrayHash Table | Medium | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Nested Set Structural EquivalenceStringSorting | Medium | 2 public reportsLast reported Jul 2026 | Practice |
PIPinterest | Expand Attribute CombinationsArrayBacktracking | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Combination Sum with Reusable ValuesArrayBacktracking | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Combination Sum with Single-Use ValuesArraySorting | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Count Ordered Combination SumsArrayDynamic Programming | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Count Ordered Combination Sums with Negative ValuesArrayHash Table | Hard | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Fixed-Length Combination SumArrayBacktracking | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Subtree Access OverridesArrayTree | Hard | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Trace an Eight-Direction Robot Until BlockedMatrixSimulation | Easy | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Experiment Bucket Allocation and RebalancingArraySimulation | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Nearest Eligible ElevatorArraySimulation | Easy | 1 public reportLast reported Jul 2026 | Practice |
PIPinterest | Time-Ordered Elevator DispatchArraySimulation | Medium | 1 public reportLast reported Jul 2026 | Practice |
PIPinterest | Assign Pins to the Shortest ColumnHeapGreedy | Medium | 1 public reportLast reported May 2026 | Practice |
Onsite practice path
Practice complete solutions and defend the choices behind them. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
PIPinterest | Optimal Account BalancingArrayHash Table | Hard | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Reconstruct an Itinerary Without a Fixed StartGraphSorting | Hard | 2 public reportsLast reported Aug 2026 | Practice |
PIPinterest | Nested Set Structural EquivalenceStringSorting | Medium | 2 public reportsLast reported Jul 2026 | Practice |
PIPinterest | Nested JSON Schema ValidatorStringDepth-First Search | Hard | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Minimize the Longest Hike Between Rest StopsArrayBinary Search | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Phone Spam Report CounterHash TableDesign | Easy | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Autocomplete SystemStringHash Table | Hard | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Dataset Schema ValidatorHash TableString | Medium | 1 public reportLast reported Aug 2026 | Practice |
PIPinterest | Join Sources with Lagged Destination TimestampsArrayHash Table | Medium | 1 public reportLast reported Aug 2024 | Practice |
01 · Preparation plan
Pinterest's public assets support a useful progression through nested records, combinatorial choices, and tree updates. These implementation skills provide a bridge to the linked search, feed, and catalog-design exercises. The bridge is a preparation recommendation, not a description of Pinterest's production stack. This is a suggested practice sequence, not the employer's interview process. Your invitation and recruiter guidance remain the source of truth.
Use JSON schema validation to separate field presence, type rules, and recursive structure. Keep failures attributable to the location that violated the contract.
Start with reusable combination sums, then contrast the single-use variant in the catalog. The decision about advancing the candidate index changes the search space.
The compact-forest exercise makes representation changes observable. Identify descendants before removing storage positions that other nodes may reference.
02 · Broader technical practice
These public Pinterest-tagged exercises cover additional technical formats. They are included only when a verified catalog record and a crawlable practice page both exist.
Design durable batched large-file upload, synchronous request outcomes, authorized download, content-addressed byte reuse, offline terminal notification, and reference-safe deletion.
Open practiceDesign a scalable, polite crawler that discovers, fetches, deduplicates, and stores public web pages.
Open practiceDesign a low-latency service that returns deterministic prefix suggestions from a large, frequently refreshed phrase catalog.
Open practiceDesign a durable service that applies one validated change to a frozen set of records with observable partial outcomes and safe retries.
Open practiceDesign a reliable event-time pipeline that ingests ad events and serves reproducible campaign analytics despite duplicates, late data, and replay.
Open practiceModel one blackjack table round with recursive hand splitting and a shoe that honors a cut-card reshuffle boundary.
Open practiceSend per-comment push notifications for ordinary content while aggregating viral comment bursts and enforcing per-owner limits.
Open practiceDesign a scalable reverse-chronological feed for posts from authors a user currently follows.
Open practiceDesign an authoritative inventory service that supports safe point adjustments and large asynchronous file-based updates.
Open practiceDesign category-partitioned leaderboards that ingest scores idempotently and publish fresh rankings under skewed load.
Open practiceDesign a multi-tenant catalog pipeline for point and bulk product updates that converge into serving-ready merchant catalogs.
Open practice03 · Evidence boundary
It means practicing transferable implementation, testing, and technical reasoning with public catalog assets FastPrep tags to Pinterest. It does not mean FastPrep has access to the company's assessments or any private interview bank.
Repeated public sightings and last-reported dates can help you prioritize practice, but they cannot predict the questions, format, or platform in a specific interview.
04 · Plain answers
This page owns technical-practice intent for Pinterest. Hiring activity, timelines, and market signals remain on the separate hiring-insights page.
The linked catalog includes relevant design practice, but a design title alone does not establish a machine-learning interview curriculum. This page prioritizes verified coding and general system-design assets. Model training, experimentation, and specialist ML requirements should be added only when supported by your role guidance.
No. FastPrep is an independent interview-preparation product and is not affiliated with Pinterest. The page uses FastPrep's public practice catalog and does not claim official, private, leaked, or proprietary employer questions.
Stage labels come from FastPrep's public problem metadata. A problem can carry more than one reported stage, and hiring processes can change by role, level, location, and date. Treat the labels as preparation context, not a guarantee.
Start with the stage named in your invitation or recruiter message. If no stage is known, use the largest available set to build general problem-solving fluency, then rehearse explanation and testing separately.
No. Public catalog counts, stage tags, and last-reported dates can help prioritize practice, but they cannot predict a specific interview's questions, sequence, timing, or platform.
Your next stage, made concrete
Start with the stage named in your invitation, then use public evidence as context—not as a promise of what you will be asked.
Open the practice set