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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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Showing 2281–2310 of 2336 results
- WaymoHardSoftware EngineerFind a Repeating Vehicle Program Under Fuel and Memory Limits
Find any repeating vehicle program of at most ten commands with fuel and obstacles, using complete bounded search, terminating simulation, and explicit execution assumptions.
Coding & AlgorithmsOnsite - WaymoMediumSoftware EngineerFixed-Capacity Least-Recently-Used Cache Driven by Get and Put Operations
Design a fixed-capacity least-recently-used cache as an object-oriented exercise, driven here by a list of get and put operations whose read results you return. Tests O(1) lookup, recency updates on reads and writes, and correct eviction order.
Coding & AlgorithmsOnsite - WaymoMediumSoftware EngineerFormat Bytes as a Hex and ASCII Dump
This problem tests string manipulation, modular arithmetic, and careful handling of formatting constraints to produce a standardized hexadecimal memory dump.
Coding & AlgorithmsOnsiteStringsFormattingImplementation - WaymoMediumSoftware EngineerHandle Competing Work Priorities
This question evaluates your ability to evaluate trade-offs between conflicting engineering tasks, manage stakeholder expectations when commitments change, and adapt plans when new data emerges.
Behavioral & LeadershipOnsiteBehavioralPrioritizationStakeholder Management - WaymoMediumSoftware EngineerImplement an ObjectTracker That Merges Observations From Two Perception Systems
Two perception systems track the same objects under different IDs. Implement an ObjectTracker with addLink, addObservation and getHistory that returns an object's observations from both systems in timestamp order, testing identity grouping and history merging.
Software Engineering FundamentalsOnsite - WaymoMediumSoftware EngineerIn-Place Rectangle Copy Within a 2D Array Using O(1) Extra Memory
Copy a rectangular block of a 2D array to another position in the same array, in place with O(1) extra memory, where the source and destination blocks may overlap. Tests choosing a safe copy direction so that no value is overwritten before it is read.
Coding & AlgorithmsOnsite - WaymoMediumSoftware EngineerInsert +, -, * and Parentheses Between Ordered Numbers to Reach a Target
Given numbers in a fixed order and a target, insert +, - or * between them and add parentheses to reach the target, returning the lexicographically smallest fully parenthesized expression or an empty string. Starts with three numbers and generalizes to n, testing exhaustive search over expression trees.
Coding & AlgorithmsOnsite - WaymoMediumSoftware EngineerLowest Horizontal Cut That Splits Square Cakes Into Equal Total Areas
Square cakes sit on a table with sides parallel to its edges; find the lowest horizontal cut line that splits the total cake area equally, returned as an exact fraction. Tests sweeping over heights, piecewise-linear area accumulation and exact arithmetic.
Coding & AlgorithmsOnsite - WaymoMediumSoftware EngineerMinimize Total Grid Distance to Every Building
Find an empty land cell in a 2D grid that minimizes the sum of shortest travel distances to all buildings without traversing through obstacles or other buildings.
Coding & AlgorithmsOnsiteBreadth-First SearchMatrixShortest Path - WaymoMediumSoftware EngineerParse a Raw CSV String Into a Structure for Downstream Teams, Handling Corrupted Rows
Parse a raw CSV string from scratch into a data structure other engineering teams can consume, with the prompt given verbally and only one sample record. The follow-up handles corrupted rows where the header is trusted but rows may be missing fields, testing tokenizing, API design and error reporting.
Software Engineering FundamentalsOnsite - WaymoMediumSoftware EngineerRespond to On-Call Pressure, Feedback, and Team Conflict
This question assesses a candidate's ability to navigate high-pressure production incidents, manage interpersonal conflict under uncertainty, and drive long-term systemic improvements.
Behavioral & LeadershipOnsiteBehavioralOn-callConflict Resolution - WaymoMediumSoftware EngineerSort the Results of Applying a Quadratic Function to a Sorted Array
Apply the quadratic function a*x*x + b*x + c to every element of a sorted integer array and return the results in sorted order, where a may be negative or zero. Tests reasoning about the parabola's shape and merging values from both ends in linear time.
Coding & AlgorithmsOnsite - WorkdayMediumSoftware EngineerBuild a Fuzzy Keyword Index
This problem tests your ability to design an efficient data structure for performing fuzzy keyword lookups using edit distance constraints on a static corpus of strings.
Coding & AlgorithmsOnsiteStringsTrieHash Map - WorkdayMediumSoftware EngineerDesign AI-Powered Document Search
This question assesses the ability to design an end-to-end, scalable pipeline for ingesting, processing, and indexing heterogeneous documents (PDFs, images, text files) to support AI-driven semantic search.
ML System DesignOnsiteSystem DesignML EngineeringPipelines - ZipHQMediumSoftware EngineerFind flush and straight groups in cards
This question evaluates array and string manipulation, grouping and sequence-detection competencies, specifically handling same-rank aggregation and same-suit consecutive runs with overlap and maximality considerations.
Coding & AlgorithmsOnsite - ZipHQHardSoftware EngineerTrack Repeated Approval Alerts and Safely Update Alert Levels
Design cached alert counts and rejection decisions with explicit thresholds, level-update semantics, duplicate handling, and recoverable state.
Software Engineering FundamentalsOnsite - ZiplineMediumSoftware EngineerDesign a Redundant Railroad Crossing
This question evaluates competency in safety-critical system design, covering requirements analysis, redundancy and fault-tolerance, sensor and actuator integration, real-time control logic, and monitoring and maintenance considerations.
System DesignOnsite - ZiplineMediumSoftware EngineerOptimize Autonomy Mapping Components
This question evaluates a candidate's skills in embedded perception and state-estimation, covering design of data structures and update algorithms for a 2.5D elevation grid with uncertainty as well as conceptual review of a causal one-dimensional smoothing filter.
Software Engineering FundamentalsOnsite - ZiprecruiterMediumSoftware EngineerDesign a voting counter for restaurants
This question tests the ability to manage real-time updates to counters using hash maps and to implement a deterministic sorting logic for ranking items with tie-breaking rules.
Coding & AlgorithmsOnsiteHash MapSystem DesignSorting - ZooxHardSoftware EngineerCan a Car Meet a Truck?
This problem tests your ability to determine if two entities moving on a 2D grid can ever occupy the same coordinate at the same time, using interval arithmetic and pathfinding logic.
Coding & AlgorithmsOnsiteGeometryAlgorithmsSimulation - ZooxMediumSoftware EngineerExplain GPU Memory And Matrix Transpose Optimization
Tests understanding of GPU memory hierarchy, memory coalescing, shared memory bank conflicts, and optimization techniques through the canonical matrix transpose problem.
Software Engineering FundamentalsOnsiteCUDAGPU ArchitectureMemory Coalescing - ZooxMediumSoftware EngineerPredict the Output of Go Code Storing Pointers to a for-Loop Variable
A Go output-prediction question about a for loop that appends the address of its loop variable on every iteration and prints the stored values afterwards. It tests loop-variable semantics across Go language versions, escape analysis, and whether such pointers are safe to dereference.
Software Engineering FundamentalsOnsite - ZooxMediumSoftware EngineerPredict the Output of a Go Program That Appends to a Sub-Slice
A Go output-prediction question: a short program takes a sub-slice of a slice, appends to it inside a helper function and prints three slices. It tests how slice headers, length, capacity and shared backing arrays interact with append, and whether a candidate can trace them precisely.
Software Engineering FundamentalsOnsite - ZscalerMediumSoftware EngineerDesign Global Metrics Monitoring and Real-Time Alerting
This question tests the ability to design a distributed, scalable telemetry pipeline capable of handling high-cardinality time-series data and real-time alerting with deduplication.
System DesignOnsiteObservabilityDistributed SystemsScalability - ZscalerMediumSoftware EngineerDesign a Multi-Dimensional Job Rate Limiter
This problem tests the ability to design a thread-safe, distributed rate-limiting system that supports multi-dimensional, nested quota enforcement.
Software Engineering FundamentalsOnsiteSystem DesignRate LimitingConcurrency - ZscalerMediumSoftware EngineerReason About Remote Browser Isolation and Secure Media Delivery
Assess and compare network security access models (RBI, ZTNA, VPN), then design a secure media delivery architecture for large, streamable video assets with fine-grained authorization and integrity controls.
Software Engineering FundamentalsOnsiteSystem DesignZero TrustComputer Networks - eBayHardSoftware EngineerAnswer senior behavioral questions
This question evaluates a senior engineer's leadership, influence, communication of impact, and ability to articulate complex technical challenges, and it sits in the Behavioral & Leadership category for software engineering roles.
Behavioral & LeadershipOnsite - eBayMediumSoftware EngineerCompute the Wait for a Warmer Day
This problem tests your ability to efficiently find the distance to the next greater element in an array, typically requiring an O(n) approach using a monotonic stack.
Coding & AlgorithmsOnsiteArraysStackMonotonic Stack - eBayMediumSoftware EngineerDesign a Rotating Workplace Food-Ordering Service
Tests the ability to design an enterprise food-ordering platform featuring scheduled vendor rotations, optimistic concurrency control for live inventory, and reliable checkout with corporate subsidy splitting.
System DesignOnsiteDistributed SystemsE-CommerceConcurrency - eBayMediumSoftware EngineerDesign a Shopping Search Bar with Autocomplete
Tests candidate's ability to design a dual-path search system that separates low-latency typeahead suggestions from heavy, filtered e-commerce catalog search at scale.
System DesignOnsiteSearchAutocompleteDistributed Systems
Waymo
ZipHQ
Zipline
Zoox