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Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
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Showing 3301–3330 of 4616 results
- PinterestHardSoftware EngineerScheduling Four Apps at Once on Kubernetes and a Node-Feedback Scheduler Plugin
A Kubernetes scheduling exercise for a senior infrastructure role: four applications request scheduling at the same time, and the candidate must ask the questions that settle capacity, priority, placement and coordination, then commit to a plan. A second part designs a scheduler plugin that uses signals reported by nodes.
System DesignTechnical Screen - PinterestMediumSoftware EngineerSelect the Nearest Eligible Elevator
Implement an elevator dispatch selection algorithm that finds the nearest eligible elevator for a passenger request based on floor, direction, and tie-breaking rules.
Coding & AlgorithmsTechnical Screenarrayssimulationgreedy - PinterestHardSoftware EngineerSenior Staff Infra Hiring Manager Screen: Career Arc, Reasons for Leaving, Team Fit
A hiring manager conversation for a senior staff backend infrastructure role covering a walkthrough of the last ten years of a career, the reasons for leaving a current job, and how past work maps to the team's technical challenges. It tests narrative focus, staff-level scope and honest self-assessment.
Behavioral & LeadershipTechnical Screen - PinterestMediumSoftware EngineerSettle Group Expenses with Transfers
This question evaluates the ability to compute and reconcile per-person financial balances from transactional data and to translate net liabilities into direct transfers, exercising skills in numeric bookkeeping and data aggregation.
Coding & AlgorithmsTechnical Screen - PinterestMediumData EngineerSettle Shared-Expense Debts, Then Reduce the Number of Payments
A coding question about settling shared expenses: turn a list of debts between people into payments that leave everyone even, first with no limit on the number of payments and then with as few payments as possible. It tests net-balance reasoning, matching payers with receivers, heap usage, and judging whether a greedy settlement is truly minimal.
Software Engineering FundamentalsTechnical Screen - PinterestMediumData EngineerSettle a Group Tab With the Fewest Possible Payments
Turn a list of recorded debts between friends into a list of payments that settles every balance, first with any valid list and then with the fewest payments possible, using net-balance accounting and a backtracking search over who pays whom.
Software Engineering FundamentalsTechnical Screengraphsbacktrackinggreedy - PinterestMediumSoftware EngineerSolve Multiple Coding Interview Problems
Tests breadth-first search and bipartite/dual-graph modeling to find the minimum number of transit lines needed to travel between two stops.
Coding & AlgorithmsTechnical ScreenGraphBFSHash Table - PinterestMediumSoftware EngineerSolve Two Grid Search Problems
This problem tests your ability to navigate 2D grids and apply graph traversal algorithms to identify connected components and calculate propagation distances.
Coding & AlgorithmsTechnical ScreenGraph TheoryBFSDFS - PinterestHardMachine Learning EngineerSolve a 9x9 Sudoku puzzle
This question evaluates algorithmic problem-solving skills focused on constraint satisfaction, state-space search, and implementation correctness for combinatorial puzzles.
Coding & AlgorithmsTechnical Screen - PinterestMediumData ScientistWrite Queries for Pinterest Engagement Tasks
This question evaluates SQL-based data manipulation and Python set/co-occurrence computation skills, covering aggregation, joins, timestamp-based cohorting and windowing, freshness detection, CTR calculation, and similarity scoring within a data scientist context.
Data Manipulation (SQL/Python)Technical Screen - PlaidMediumSoftware EngineerCalculate Ordered Job Makespan Across Parallel Workers
Calculate the total makespan required to process a queue of ordered jobs across a fixed pool of identical parallel workers.
Coding & AlgorithmsTechnical ScreenHeapGreedySimulation - PlaidMediumSoftware EngineerCompute discounted prices in a queue
This question evaluates proficiency in array processing, algorithm design, use of auxiliary data structures such as monotonic stacks, and formal complexity and correctness reasoning.
Coding & AlgorithmsTechnical Screen - PlaidMediumSoftware EngineerCount Completed Jobs in a Serial Multi-Worker Pipeline
Calculate the total number of jobs completed by a given deadline across a multi-stage pipelined system with worker pools. The solution requires simulating stage-by-stage batch execution, tracking wave durations, and enforcing barrier synchronization between stages.
Coding & AlgorithmsTechnical ScreenSimulationDynamic ProgrammingQueue - PlaidMediumSoftware EngineerCount Completed Jobs in a Serial Single-Worker Pipeline
Determine the total number of jobs completed by a single worker executing a sequence of stage-gated tasks before a time limit expires. Tests linear simulation, division/modulo arithmetic, handling of zero-duration and zero-count edge cases, and 64-bit integer safety.
Coding & AlgorithmsTechnical ScreenSimulationMathGreedy - PlaidEasySoftware EngineerDesign a ChatGPT-like conversational assistant
This question evaluates a candidate's ability to design large-scale conversational AI systems, covering competencies in distributed system architecture, real-time streaming, stateful multi-turn session management, safety controls, and integration with external tools.
System DesignTechnical Screen - PlaidMediumMachine Learning EngineerDesign a Fraud Detection System
This question evaluates competency in ML system design for fraud detection within fintech data-connectivity platforms, testing real-time scoring, feature engineering (including relational/graph signals), label strategy, model training and serving, and operational concerns such as latency, privacy, monitoring, and robustness.
ML System DesignTechnical Screen - PlaidMediumSoftware EngineerDesign a coupon redemption system
This question evaluates proficiency in data structures and algorithms for building an in-memory service, including efficient lookup/update strategies, expiration handling, limit enforcement, idempotency, concurrency considerations, and time/space complexity reasoning.
Coding & AlgorithmsTechnical Screen - PlaidEasySoftware EngineerDesign a geo-distributed rate limiter
This question evaluates a candidate's competency in designing geo-distributed, globally consistent rate limiting systems that enforce per-API-key and additional constraints while balancing low-latency request paths and regional failure tolerance.
System DesignTechnical Screen - PlaidMediumSoftware EngineerExplain project scope, timeline, and delegation
This question evaluates project management, technical ownership, estimation, risk management, delegation, and cross-team communication competencies within the Behavioral & Leadership domain for software engineers.
Behavioral & LeadershipTechnical Screen - PlaidEasySoftware EngineerResolve routing-number to bank mapping
This question evaluates a candidate's skills in data normalization, deduplication, aggregation, and conflict resolution across multiple JSON data sources, with emphasis on canonicalization of aliases and handling inconsistent mappings.
Coding & AlgorithmsTechnical Screen - PlaidMediumSoftware EngineerValidate Evaluation Chains and Resolve Boolean Outcomes
Implement a graph traversal to resolve Boolean evaluation chains with negation, detecting cycles, paths leading to cycles, and undefined references in linear time.
Coding & AlgorithmsTechnical ScreenGraphDFSCycle Detection - PlaidMediumSoftware EngineerValidate and Resolve Chained Decision Rules
Determine if all rules in a chained decision rule set resolve to a terminal 'pass' outcome without cycles or missing references.
Coding & AlgorithmsTechnical ScreenGraphDFSCycle Detection - PlaystationMediumData ScientistDesign Experiments Under Network Interference
This problem tests your understanding of causal inference in networked environments, focusing on how to detect and mitigate bias when treatment effects spill over between connected users in a social gaming platform.
Analytics & ExperimentationTechnical ScreenCausal InferenceA/B TestingNetwork Science - PlaystationEasySoftware EngineerGroom a Ticket to Replace a Store's 12+ Age Rating with a Pending Rating
A ten-minute ticket-grooming exercise in which a software engineer and a product manager groom a ticket that removes a game store's 12+ age rating and adds a Pending rating. It tests asking scope-changing questions, splitting the work into parallel tasks with clear dependencies, and giving a reasoned ETA.
Software Engineering FundamentalsTechnical Screen - PlaystationEasySoftware EngineerMost Complex Project, Ideal Work Environment, Job Values and Hobbies
Four behavioral questions from a software engineer screen: the most complex thing you have worked on, the environment in which you thrive, what you value in a job, and what you do for fun. It tests ownership, self-awareness and team fit, and the ability to give concise, specific answers backed by real examples.
Behavioral & LeadershipTechnical Screen - PlaystationMediumSoftware EngineerRefactor a Shopping Cart to Print Grouped, Promoted, Sorted Receipts
A 30-minute object-oriented exercise that turns a stream of item names into a printed receipt, then extends it to group items by type, apply a buy-three-get-two-free promotion and sort the lines alphabetically. It tests refactoring a shopping cart's storage and its add and remove methods, exact money handling and clean class design.
Software Engineering FundamentalsTechnical Screen - Plymouth Rock Assurance CorporationMediumData ScientistCalculate Ultimate Loss by Policy Term
This question evaluates a candidate's ability to perform sequence-aware cumulative aggregation and partitioned data manipulation, assessing competency in calculating running totals (ultimate loss) across policy-term records.
Data Manipulation (SQL/Python)Technical Screen - Point72MediumData ScientistClassify relationships for multiple circle pairs
This question evaluates computational geometry skills, careful integer arithmetic for numeric precision, case-based classification logic, and analysis of time and space complexity in the Coding & Algorithms domain for Data Scientist roles.
Coding & AlgorithmsTechnical Screen - Point72MediumData ScientistConvert Dates to Calendar Quarter Labels in SQL/Python
This question evaluates a candidate's ability to perform date/time data transformation and normalization in SQL or Python, focusing on converting raw numeric dates into standardized quarter labels for aggregation and reporting.
Data Manipulation (SQL/Python)Technical Screen - Point72MediumQuantitative ResearcherDefend a Quantitative Factor Research Project
Practice defending quantitative factor construction, information coefficient, model selection, backtesting, and research improvements.
Machine LearningTechnical Screen
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