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Software Engineer 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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- 11
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Showing 1981–2010 of 2629 results
- RipplingMediumSoftware EngineerCompare Complete or Partial Hands
This question evaluates implementation of card-hand evaluation logic, combinatorial reasoning about incomplete information, and deterministic tie-breaking rules for comparing complete and partial poker-like hands.
Coding & AlgorithmsOnsite - RipplingMediumSoftware EngineerCompare Two Five-Card Numeric Hands
Compare two five-digit numeric hands under a nonstandard multiplicity ranking and original-position right-to-left tie-break, using extensible category evaluators rather than standard poker rules.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerCompute concurrent online drivers
This question evaluates proficiency in algorithms and temporal data handling, including the use of efficient search techniques and complexity reasoning to count distinct active drivers over a sliding 24-hour window.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerCompute max simultaneous drivers last 24 hours
This question evaluates proficiency in reasoning about time-interval overlap, event aggregation, and online data structures for streaming interval queries, testing skills in algorithm design and temporal data handling within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerCompute maximum simultaneous drivers
This English summary evaluates the candidate's proficiency in algorithm design and complexity analysis within the Coding & Algorithms domain, specifically for aggregating interval data and computing concurrent counts.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerCompute median of two sorted arrays
This question evaluates algorithmic problem-solving with sorted arrays, focusing on concepts like binary search, partitioning strategies, complexity analysis, and careful handling of edge cases when computing order statistics.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerCompute peak busy dashers with overlaps
This question evaluates skills in interval-overlap reasoning, sweep-line algorithm design, event creation and deduplication, comparator and tie-breaking subtleties, and asymptotic time/space complexity analysis within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerConvert amounts between multiple currencies
This question evaluates understanding of graph modeling and path-optimization in directed weighted graphs, specifically reasoning about chained conversions and maximizing multiplicative path weights.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerCourier Delivery Cost Tracker
Design a stateful tracker class to record courier delivery intervals and earnings, query running courier payouts, and calculate peak concurrent active deliveries within a specific time window.
Coding & AlgorithmsTechnical ScreenIntervalsLine SweepHash Table - RipplingMediumSoftware EngineerDesign a Driver Payroll System
Design an in-memory driver payroll system that records time-stamped earnings and supports efficient range queries for both individual drivers and company-wide aggregates.
Coding & AlgorithmsTechnical Screenbinary-searchprefix-sumdata-structure-design - RipplingMediumSoftware EngineerDesign a music player with favorites cap
This question evaluates a candidate's ability to design and implement in-memory data structures, stateful APIs, concurrency handling, deterministic policy enforcement for a fixed-capacity favorites feature, and reasoning about edge cases like removing the currently playing track or handling invalid IDs.
Coding & AlgorithmsOnsite - RipplingHardSoftware EngineerEvaluate Configurable Rideshare Payout Audit Rules as Data
Implement a generic rule-evaluation engine for a rideshare payout audit tool, where per-fare and per-driver-total rules, each with its own AND-combined conditions, are supplied entirely as data rather than hard-coded branches, using exact integer-cent arithmetic.
Coding & AlgorithmsTechnical Screenrule-enginedesigndata-modeling - RipplingHardSoftware EngineerEvaluate Expense and Trip-Level Rules as Data
Evaluate configurable expense and trip-sum rules using exact cents, reusable typed predicates, strict thresholds, multiple flags, and deterministic result ordering.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerFind bounding boxes of connected houses
This problem tests your ability to perform graph traversal (BFS/DFS) on a 2D grid to identify distinct connected components and compute their spatial extent.
Coding & AlgorithmsOnline AssessmentGraphsDFSBFS - RipplingMediumSoftware EngineerFind median of two sorted arrays
This question evaluates algorithmic problem-solving skills related to sorted arrays and median computation, testing competency in handling numeric order properties and complexity analysis within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerFind the Best and Worst Completion of a Partial Numeric Hand
Find the strongest and weakest five-card completions of a partial numeric hand under custom category and right-to-left tie-break rules while sharing one extensible comparison engine.
Coding & AlgorithmsTechnical Screen - RipplingMediumSoftware EngineerImplement Article Vote Tracking
Design an in-memory article vote tracking system that manages user upvotes/downvotes, detects vote flips to maintain an LRU-style flip history per user, and provides top-k article rankings by net score.
Coding & AlgorithmsTechnical Screenhash-tableheapordered-map - RipplingMediumSoftware EngineerImplement Courier Delivery Cost Tracking
Design an in-memory billing system that tracks courier pay rates over time and calculates prorated delivery costs across half-open time intervals.
Coding & AlgorithmsTechnical ScreenDesignBinary SearchIntervals - RipplingMediumSoftware EngineerImplement Food Delivery Billing
This problem tests your ability to implement complex billing logic involving conditional fee structures, time-based surcharges, and data aggregation.
Coding & AlgorithmsOnsiteAlgorithmsDatetimeData Processing - RipplingMediumSoftware EngineerImplement an In-Memory File System
Design and implement an in-memory file system supporting directory creation, file appending, reading, and lexicographically sorted path listings.
Coding & AlgorithmsOnsitetrietreedesign - RipplingEasySoftware EngineerImplement an article voting tracker
This question evaluates a candidate's ability to design efficient stateful data structures and algorithms for tracking user votes, including correct handling of idempotent repeated votes, vote changes, deduplication, and retrieval of the most recent events.
Coding & AlgorithmsTechnical Screen - RipplingHardSoftware EngineerSolve listed algorithm problems
This problem tests your ability to model exchange rates as a graph and use path-finding algorithms to detect profitable arbitrage opportunities.
Coding & AlgorithmsHR ScreenGraphsShortest PathBellman-Ford - RipplingHardSoftware EngineerStudio Session Billing with Rate Schedules and Exact Rounding
Build a command-driven billing ledger where technicians' hourly rates change over time, bookings are deduplicated, and fractional cents are kept exactly until an invoice is printed with a configurable rounding mode. Tests rate lookup by time, idempotency rules, and integer-exact money handling.
Coding & AlgorithmsTechnical Screenhash-mapbinary-searchmoney-arithmetic - RipplingMediumSoftware EngineerTrack article votes and last three flips
This question evaluates a developer's ability to design in-memory data structures that support constant-time vote updates, score aggregation, and recent flip-event tracking while handling vote-change semantics.
Coding & AlgorithmsOnsite - RobinhoodMediumSoftware EngineerCompute Load Factors in a Service Dependency DAG
Calculate downstream request multipliers for services in a directed acyclic graph (DAG) starting from an entrypoint service, accounting for converging dependency paths and unreachable nodes.
Coding & AlgorithmsTechnical ScreenGraphTopological SortDAG - RobinhoodMediumSoftware EngineerCompute dependency load factors in a DAG
This problem tests your ability to model dependencies in a Directed Acyclic Graph (DAG) and calculate the cumulative 'load' contribution of each node, requiring efficient graph traversal techniques like topological sorting or recursion with memoization.
Coding & AlgorithmsTechnical ScreenGraphDAGRecursion - RobinhoodMediumSoftware EngineerCompute nearest gate distance in grid
This problem tests your ability to perform multi-source Breadth-First Search (BFS) on a grid to find the shortest distance from every cell to the nearest target (gate).
Coding & AlgorithmsTechnical ScreenBFSGraphsGrid - RobinhoodEasySoftware EngineerCompute trigger counts in a DAG
This question evaluates understanding of directed acyclic graphs, graph traversal and accumulation of values across dependency edges, as well as algorithmic efficiency for handling large sparse graphs.
Coding & AlgorithmsTechnical Screen - RobinhoodHardSoftware EngineerCount Unique Dependents in a Referral DAG
Count unique direct and transitive dependents in a DAG, preserving edge direction, ignoring unknown endpoints, and handling shared descendants without double-counting.
Coding & AlgorithmsOnsite - RobinhoodMediumSoftware EngineerDesign a constrained cache and secure string validator
This question tests the ability to implement a thread-safe, size-constrained cache (LRU-like) and robust string validation logic for identifying malformed or potentially malicious input strings.
Coding & AlgorithmsOnsiteConcurrencyLRUHashing
Rippling
Robinhood