practice a little every day, paws crossed ♡
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.
- 9403
- Questions
- 546
- Companies
- 11
- Topics
- 8
- Languages
Showing 2701–2730 of 2810 results
- Walmart LabsMediumSoftware EngineerCompare Quicksort and Mergesort in Practice
This problem tests your deep understanding of sorting algorithm internals beyond asymptotic complexity, focusing on practical trade-offs in memory, stability, and data characteristics.
Software Engineering FundamentalsTechnical ScreenAlgorithmsSystem DesignSorting - Walmart LabsMediumSoftware EngineerCompute days until plants stop dying
This question evaluates a candidate's ability to reason about array-based state transitions and algorithmic complexity, testing competency in analyzing iterative dependencies among elements and handling large input sizes.
Coding & AlgorithmsTechnical Screen - Walmart LabsMediumSoftware EngineerCompute the Minimum Number of Meeting Rooms
Determine the minimum number of meeting rooms required to accommodate a set of schedule intervals where intervals are half-open and meetings can start at the exact moment another ends.
Coding & AlgorithmsTechnical Screenintervalssortingheap - Walmart LabsMediumSoftware EngineerCount ways to make change (DP)
This problem tests the ability to solve the classic 'Coin Change II' problem using dynamic programming to count the number of unique combinations that sum up to a target amount.
Coding & AlgorithmsTechnical ScreenDynamic ProgrammingCombinatoricsOptimization - Walmart LabsMediumSoftware EngineerDescribe past projects and impact
This question evaluates ownership, technical decision‑making, system design trade-offs, cross‑team leadership, execution discipline and impact measurement within software engineering projects.
Behavioral & LeadershipTechnical Screen - Walmart LabsMediumSoftware EngineerDesign Spring Boot for high availability and background work
This question tests the ability to scale a stateless Spring Boot service while ensuring reliable execution of asynchronous background tasks in a distributed environment.
System DesignTechnical ScreenSpring BootScalabilityMessaging - Walmart LabsMediumSoftware EngineerDesign a Large-Scale Real-Time Temperature Collection System
Design an end-to-end IoT temperature telemetry platform capable of ingesting high-throughput sensor streams, handling out-of-order data, projecting real-time status, and managing long-term time-series storage.
System DesignTechnical ScreenIoTTime SeriesDistributed Systems - Walmart LabsMediumSoftware EngineerDesign a Metrics Monitoring Dashboard
This question tests the ability to architect a scalable time-series data pipeline, focusing on ingestion, storage strategies for high-throughput metric data, and query performance for dashboard visualization.
System DesignTechnical ScreenScalabilityTime SeriesObservability - Walmart LabsMediumSoftware EngineerDesign a multi-carrier parcel delivery system
This question evaluates system design and integration competencies, including distributed architecture, API design, data modeling, reliability, scalability, and handling heterogeneous third-party carrier integrations for a multi-carrier parcel shipping platform.
System DesignTechnical Screen - Walmart LabsMediumSoftware EngineerFind shared courses between student pairs
This problem tests your ability to efficiently map relationships and compute intersections between multiple sets to identify commonalities across pairs.
Coding & AlgorithmsTechnical ScreenHash MapSetData Structures - Walmart LabsEasySoftware EngineerFind the Longest Even-Length Word
Tests string tokenization, linear scanning, tie-breaking logic, and handling of edge cases such as absent matches or irregular whitespace.
Coding & AlgorithmsTechnical ScreenStringsAlgorithmsWalmart - Walmart LabsHardSoftware EngineerImplement a Range Module with Add, Query, and Remove
Design a data structure that tracks coverage of real numbers using half-open intervals, supporting dynamic additions, removals, and continuous coverage queries. This tests ordered data structure manipulation, interval merging/splitting invariants, and binary search.
Coding & AlgorithmsTechnical Screenbinary-searchdesignintervals - Walmart LabsMediumSoftware EngineerImplement a Shape interface using OOP
This problem tests your ability to design a robust object-oriented structure using interfaces and concrete class implementations, focusing on polymorphism and data encapsulation.
Software Engineering FundamentalsTechnical ScreenOOPInterfacesPolymorphism - Walmart LabsMediumSoftware EngineerImplement lexicographically smallest Two Sum
This question evaluates array manipulation, index-level reasoning, and algorithmic efficiency for locating pair sums under lexicographic tie-breaking, testing attention to ordering constraints and correct index selection.
Coding & AlgorithmsTechnical Screen - Walmart LabsHardSoftware EngineerShortest Talent-Covering Team Starting At Each Index
Practice a sliding-window coding question where each start index needs the shortest contiguous team containing every talent type. This prompt targets hash map counts, two-pointer window management, and O(n) reasoning for large arrays.
Coding & AlgorithmsTechnical Screen - Warner Bros DiscoveryMediumSoftware EngineerDesign an ad content delivery system with A/B testing
This question evaluates system-design and distributed-systems competency, specifically real-time ad serving, targeting and campaign data modeling, high-throughput event logging, and A/B testing/experimentation infrastructure including experiment assignment and metric computation.
System DesignTechnical Screen - Warner Bros DiscoveryMediumSoftware EngineerImplement array rotations and CSV keyword search
This question evaluates array manipulation and string parsing competencies, focusing on rotating arrays via modular index arithmetic and locating substring occurrences within a simple CSV while mapping each match to row, column, and character position.
Coding & AlgorithmsTechnical Screen - WarpMediumSoftware EngineerImplement Terminal Tabs and Split Panels
This question evaluates the ability to design and implement hierarchical data structures, model tree-based panel layouts, and perform precise serialization/deserialization of nested UI state.
Coding & AlgorithmsTechnical Screen - WayfairHardSoftware EngineerMaximize the Product of Pair Distance and Minimum Value
Tests optimal two-pointer and greedy reasoning to maximize a distance-weighted minimum value pair in linear time.
Coding & AlgorithmsTechnical ScreenTwo PointersGreedyArrays - WaymoMediumSoftware EngineerBuild an Expression That Reaches a Target
This problem tests your ability to use recursion with backtracking or dynamic programming to partition a sequence of numbers and apply operators to satisfy a target value.
Coding & AlgorithmsTechnical ScreenRecursionBacktrackingMemoization - WaymoMediumSoftware EngineerCompute ETA between two map nodes
This problem tests your ability to implement Dijkstra's algorithm to find the shortest path in a weighted directed graph representing a road network.
Coding & AlgorithmsTechnical ScreenGraphsShortest PathDijkstra - WaymoMediumSoftware EngineerCompute Max Pooling Values and Coordinates
This problem tests your ability to manipulate 2D arrays, manage sliding window bounds, and track metadata (indices) efficiently during a data transformation task.
Coding & AlgorithmsTechnical ScreenArrays2D-GridSliding-Window - WaymoHardSoftware EngineerCount Squares Formed by Segments
Count distinct axis-aligned squares whose full sides are covered by horizontal and vertical integer-coordinate segments. Normalize and merge collinear coverage, avoid duplicate geometric squares, support overlapping segments and negative coordinates, and index interval coverage efficiently.
Coding & AlgorithmsTechnical Screen - WaymoMediumSoftware EngineerDecide If a Vehicle Is Ready to Go from Open/End Maintenance Events
Given a vehicle maintenance log of open and end events with timestamps and maintenance types such as oil or brake, decide whether the vehicle is ready to go. The problem tests chronological event processing with a stable tie rule, per-type state tracking, and detecting unmatched ends, overlapping opens, and tasks left open.
Coding & AlgorithmsTechnical Screen - WaymoMediumSoftware EngineerDesign a Global Small-Image Caching Service
This problem tests the ability to design a highly available, globally distributed caching layer that handles high-throughput small-image delivery while maintaining data consistency and resilience against origin failures.
System DesignTechnical ScreenCachingDistributed SystemsLatency - WaymoMediumSoftware EngineerDesign a Real-Time Player Matchmaking Service
This problem tests the ability to design a distributed, low-latency matchmaking system capable of handling concurrent requests, state consistency, and efficient participant matching.
System DesignTechnical ScreenDistributed SystemsConcurrencyCaching - WaymoMediumSoftware EngineerDesign a System for a Vehicle Fleet Collecting Map Data for Autonomous Driving
A system design interview question asking you to design the system that runs a vehicle fleet collecting sensor data for autonomous driving maps. It tests coverage and mission planning, offloading very large sensor logs, reliable ingestion, data quality checks, privacy, and storage at petabyte scale.
System DesignTechnical Screen - WaymoMediumSoftware EngineerDesign and Implement a Cross-System Object Tracker
This problem tests your ability to design an efficient data structure for maintaining and merging temporal events associated with multiple system-generated IDs for the same physical object.
Software Engineering FundamentalsTechnical ScreenDSUData StructuresSystem Design - WaymoMediumSoftware EngineerExpand Nested Repetition Expressions
This problem tests your ability to parse nested patterns and handle recursion or stack-based state management to expand strings defined by repetition rules.
Coding & AlgorithmsTechnical ScreenStringsRecursionStack - WaymoMediumSoftware EngineerFind Every Island in a Grid and Measure Its Boundary with Water
A grid coding problem that asks you to find every island of land cells and report the length of each island's boundary with water, including enclosed lakes and grid edges. It tests grid traversal, connected components, careful edge counting, and deterministic output ordering.
Coding & AlgorithmsTechnical Screen
Walmart Labs
Wayfair
Waymo