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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.
- 9403
- Questions
- 546
- Companies
- 11
- Topics
- 8
- Languages
Showing 31–60 of 4616 results
- AdyenMediumSoftware EngineerImplement LRU and target-sum combinations
Implement LRU and target-sum combinations evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsTechnical Screen - AeoneaMediumSoftware EngineerFill missing values with means
This question evaluates proficiency in missing-data imputation and pandas DataFrame manipulation, testing skills in column-wise aggregation, group-wise operations, and edge-case handling within the Data Manipulation (SQL/Python) domain.
Data Manipulation (SQL/Python)Technical Screen - AeoneaMediumSoftware EngineerFind two numbers summing to target
This question evaluates algorithm design and complexity analysis skills, specifically the ability to identify element pairs in arrays and reason about time-space tradeoffs.
Coding & AlgorithmsTechnical Screen - AeoneaMediumSoftware EngineerImplement a tennis score tracker
This question evaluates a candidate's ability to implement stateful scoring logic and choose appropriate data structures for tracking sequential events, specifically handling tennis scoring rules such as 0/15/30/40 progression, Deuce, Advantage, and the two-point lead requirement.
Coding & AlgorithmsTechnical Screen - AffirmMediumSoftware EngineerAggregate loans and match repayments
Implement a transaction matching engine that aggregates user loans and allocates repayments chronologically to outstanding balances using a FIFO waterfall approach.
Coding & AlgorithmsTechnical Screenarrayshash-tablesorting - AffirmMediumData ScientistAnalyze Loan Payments Using Pandas for Key Insights
This question evaluates data manipulation and aggregation skills using pandas, focusing on computing per-loan payment totals, payment success rates, and a repayment-status flag. It is commonly asked to assess applied data wrangling and numeric summarization abilities in the Data Manipulation (SQL/Python) domain, testing practical application rather than purely conceptual understanding.
Data Manipulation (SQL/Python)Technical Screen - AffirmMediumSoftware EngineerAnalyze Returning Borrowers Across Two Days of Logs
Process two daily loan activity logs to identify users active on both days with diverse loan types, then score them using a configurable trust policy.
Data Manipulation (SQL/Python)Technical ScreenData ManipulationHash TablePython - AffirmEasyData ScientistCalculate Profit of 4-Month Loan at 30% APR
This interview question evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistical checks, and recommendations in a realistic interview setting. A strong answer for Calculate Profit of 4-Month Loan at 30% APR states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Analytics & ExperimentationTechnical Screen - AffirmMediumData AnalystChoose the Next Product or Vertical for a Lending Business
Compare lending product and vertical investments using demand, contribution economics, credit risk, execution capacity, scenarios, and bounded pilots.
Product / Decision MakingTechnical Screen - AffirmMediumData AnalystConnect Analyst Experience, Delivered Insights, and Your Next Role
Practice connecting relevant analyst work, a concrete delivered insight and the responsibilities you want in a credit-risk role.
Behavioral & LeadershipTechnical Screen - AffirmMediumSoftware EngineerDescribe your highest-impact project
This question evaluates leadership, ownership, impact measurement, cross-functional collaboration, and technical decision-making competencies by asking for a concrete example of a high-impact project.
Behavioral & LeadershipTechnical Screen - AffirmMediumSoftware EngineerDesign Installment-Loan Payment Processing
Design installment-loan payment processing around a bank debit API available during one daily one-hour window. Unify manual and scheduled intents, prevent duplicate debits with durable idempotency and state transitions, reconcile unknown outcomes, apply accounting atomically, and notify through an outbox.
System DesignTechnical Screen - AffirmEasySoftware EngineerDesign a High-Card Game with a Persistent Tie Pot
Design a high-card game in which tied rounds carry a persistent pot into later rounds, first for two players and then for many. Define card ownership, tie and exhaustion policies, deterministic shuffling, termination rules, extensible classes, and tests for tricky state transitions.
Software Engineering FundamentalsTechnical Screen - AffirmMediumSoftware EngineerDetect fraud events and extract PII
This problem tests your ability to process nested JSON-like structures, perform deduplication, and map related entities to detect fraudulent patterns.
Coding & AlgorithmsTechnical ScreenGraphHash MapDSU - AffirmMediumSoftware EngineerDetermine Redeemable Promotion Offers
This problem tests your ability to manage stateful constraints by processing a stream of promotional event logs to determine if a user remains eligible for a discount based on a per-user, per-promotion usage limit.
Coding & AlgorithmsTechnical ScreenHashMapsDataAggregationStreamProcessing - AffirmMediumData ScientistDiagnose Sudden Drop in Credit-Card Approval Rate
This interview question evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistical checks, and recommendations in a realistic interview setting. A strong answer for Diagnose Sudden Drop in Credit-Card Approval Rate states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Analytics & ExperimentationTechnical Screen - AffirmMediumSoftware EngineerFind shortest unique substring per word
This problem tests your ability to manipulate string data structures (like Tries or Suffix Trees) to efficiently identify the shortest, lexicographically smallest substring that is unique to a given word within a provided collection.
Coding & AlgorithmsTechnical ScreenStringsTrieHash Map - AffirmMediumSoftware EngineerHiring Manager Behavioral Interview: Challenging Project, Deadlines, Cross-Team Work
A hiring manager asks you to introduce yourself, describe a challenging project, explain why you want to join Affirm, and discuss delivering under a tight timeline, working across teams and finding where a system needs improvement. It tests structured, evidence-based behavioral answers and engineering judgment.
Behavioral & LeadershipTechnical Screen - AffirmMediumData AnalystInvestigate Rising Loan Delinquency with Stable Approval Rates
Diagnose rising 30-day loan delinquency, separate borrower-mix shifts from model drift, and evaluate merchant underwriting changes.
Analytics & ExperimentationTechnical Screen - AffirmMediumData AnalystInvestigate a Quarterly Increase in Loan Delinquency
Investigate rising delinquency through rate definitions, reporting checks, loan vintages, seasoning, portfolio mix, and within-segment deterioration.
Analytics & ExperimentationTechnical Screen - AffirmMediumData AnalystPresent a Relevant Analytics Project to a Hiring Manager
This question tests your ability to structure a past data project using the STAR method, with a specific focus on technical rigor, business logic, and self-reflection.
Behavioral & LeadershipTechnical ScreenBehavioralAnalyticsStorytelling - AffirmHardSoftware EngineerSimulate a High-Card Deck Game for Two Players, Then N Players
Model a shuffled 52-card game in which each round the higher top card wins both cards, then report the player with the most cards won. Starts with two players and generalizes to N players with uneven round-robin dealing, testing object design, rule clarification, and deterministic tests.
Software Engineering FundamentalsTechnical Screen - AgodaMediumSoftware EngineerCompute probability two arrivals meet within 15 minutes
This question evaluates understanding of continuous probability and geometric probability, focusing on independent uniform random variables and reasoning about time-window overlap.
Software Engineering FundamentalsTechnical Screen - AgodaMediumSoftware EngineerCompute triangle min path and dice stopping stats
This composite question evaluates dynamic programming and algorithmic optimization via the triangle minimum path problem and probability, stopping-time analysis and Monte Carlo simulation through the two-dice experiment, testing competencies in DP, discrete probability, expected-value reasoning and empirical estimation.
Coding & AlgorithmsTechnical Screen - AgodaEasyData EngineerCount Integers That Appear Exactly Once
Count distinct integers with frequency exactly one using complete occurrence counts, including empty arrays and separated duplicates.
Coding & AlgorithmsTechnical Screen - AgodaEasyData EngineerFind the Longest Calendar-Day Streak with All Employees Present
Identify dates when every employee is present and compute the longest consecutive streak, treating missing attendance as a gap.
Data Manipulation (SQL/Python)Technical Screen - AgodaMediumSoftware EngineerFind two numbers that sum to a target
This question evaluates array manipulation, index-based reasoning, and algorithmic problem-solving skills related to identifying value pairs that meet a numeric target.
Coding & AlgorithmsTechnical Screen - AgodaEasyData EngineerRank Customers by Monthly Revenue with Competition Ties
Aggregate customer revenue by month and return top competition ranks, preserving tied totals and deterministic display order.
Data Manipulation (SQL/Python)Technical Screen - AgodaEasyData EngineerReturn Every Employee with a Mapped or Default Unique ID
Join employees to unique-ID mappings while preserving unmatched employees and applying an explicit fallback identifier.
Data Manipulation (SQL/Python)Technical Screen - Ai2MediumSoftware EngineerMaintain an Out-of-Order Step Progress Tree
This problem tests tree reconstruction from a stream of out-of-order parent-child updates, requiring efficient hierarchical state management and cycle detection.
Coding & AlgorithmsTechnical ScreenTreesGraphsData Structures
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