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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 151–180 of 2336 results
- AmazonMediumSoftware EngineerImplement a Single-Node Priority Pub/Sub
This question evaluates understanding of concurrent system design, in-memory publish–subscribe semantics, prioritized delivery ordering, API and data structure selection, and thread-safety within the Software Engineering Fundamentals domain.
Software Engineering FundamentalsOnsite - AmazonMediumSoftware EngineerImplement tree left/right views via BFS and DFS
This question evaluates understanding of binary tree traversal techniques and algorithmic reasoning for producing per-depth left and right views, assessing competencies in data structures, traversal ordering, and correctness across edge cases.
Coding & AlgorithmsOnsite - AmazonMediumSoftware EngineerImplement two array-cost minimization algorithms
This question evaluates algorithm design, data structure selection, and complexity analysis by requiring implementations for minimizing total merge cost and for removing a contiguous block to minimize the sum of adjacent absolute differences.
Coding & AlgorithmsOnsite - AmazonMediumSoftware EngineerInfluence a Colleague Who Prefers a Different Approach
Describe influencing a colleague through shared goals, fair comparison, evidence, willingness to revise, and a concrete collaborative decision.
Behavioral & LeadershipOnsite - AmazonMediumSoftware EngineerJukebox That Plays the Most-Requested Song First
Design a request queue where each play takes the song with the most pending requests, with ties going to the most recent request. Tests keeping frequency and recency together so both operations run in O(1).
Coding & AlgorithmsOnsitedesignhash-mapstack - AmazonMediumSoftware EngineerKth Largest Perfect Binary Subtree
This problem tests tree traversal techniques, the ability to validate binary tree properties recursively, and the use of selection algorithms to find order statistics.
Coding & AlgorithmsOnsiteTreesRecursionSorting - AmazonMediumSoftware EngineerLeadership Principle Stories: Ownership, Dive Deep, Tight Deadline, Disagree and Commit
Behavioral interview practice built around leadership principles: tell stories about taking ownership beyond your role, diving deep under repeated follow-ups, handling a tight deadline, and disagreeing with a teammate then committing. It tests first-person STAR storytelling, measurable results and mapping each story to the principle asked.
Behavioral & LeadershipOnsite - AmazonMediumSoftware EngineerLeaf Domain Cumulative Scores
This problem tests your ability to model hierarchical data using tree traversal and string manipulation to aggregate cumulative metrics across nested domains.
Coding & AlgorithmsOnsiteHash MapString ManipulationTree Traversal - AmazonMediumSoftware EngineerLearn What You Need to Solve an Unfamiliar Problem
Explain learning through an unfamiliar engineering challenge, with a defined knowledge gap, targeted resources, practical validation, expert feedback, and application.
Behavioral & LeadershipOnsite - AmazonMediumSoftware EngineerMake a Difficult Decision Under Competing Constraints
Tests your ability to navigate high-stakes technical or organizational trade-offs where constraints conflict, evaluate options objectively, communicate decisions with transparency, and take ownership of the outcomes.
Behavioral & LeadershipOnsiteBehavioralAmazon Leadership PrinciplesDecision Making - AmazonMediumSoftware EngineerMake an Important Decision Before Every Option Can Be Explored
Explain a time-limited decision by identifying essential evidence, accepted uncertainty, reversible steps, stakeholder communication, and outcome checks.
Behavioral & LeadershipOnsite - AmazonMediumSoftware EngineerMaking a Decision with Missing Data
Tests a candidate's ability to demonstrate Amazon's 'Bias for Action' and 'Are Right, A Lot' leadership principles by executing a calculated, high-impact decision under uncertainty with clear rollback triggers.
Behavioral & LeadershipOnsiteBehavioralBias for ActionDecision Making - AmazonMediumSoftware EngineerMeasure platform success and drive adoption
This question assesses your ability to design a telemetry and feedback system for an internal developer platform to measure adoption, identify friction points, and drive cross-team migration.
System DesignOnsiteTelemetryDeveloper ExperienceMetrics - AmazonMediumSoftware EngineerMedian of a Data Stream
Design a data structure that continuously receives a stream of integers and efficiently supports retrieving the current running median, handling potential integer overflow during the median calculation.
Coding & AlgorithmsOnsiteHeapData StreamDesign - AmazonMediumSoftware EngineerMerge overlapping and adjacent ranges
This question evaluates a candidate's understanding of interval merging and range manipulation, including handling overlapping and adjacent ranges, edge cases like single-point gaps and extreme values, and the ability to analyze time and space complexity.
Coding & AlgorithmsOnsite - AmazonMediumSoftware EngineerMessage Rate Limiter
Design an in-memory message rate limiter that allows or denies messages based on whether a given time window has elapsed since their last accepted occurrence.
Coding & AlgorithmsOnsiteHash MapDesignRate Limiter - AmazonHardSoftware EngineerMinimize Replacements So Equal Product Values Are Contiguous
This problem tests your ability to optimize data transformations by identifying contiguous blocks of identical values, modeled as a shortest-path or dynamic programming problem on a compressed representation of the array.
Coding & AlgorithmsOnsiteGreedyDynamic ProgrammingData Structures - AmazonMediumSoftware EngineerMinimum Moves for a Squirrel to Carry Every Nut to a Tree One at a Time
A squirrel on an obstacle-free grid must carry every nut to a tree, holding at most one nut at a time and moving one cell per step. The task asks for the minimum total number of moves over all delivery orders, testing reasoning about grid distances and how the order of deliveries affects the total.
Coding & AlgorithmsOnsite - AmazonMediumSoftware EngineerModel an Extensible Employee Cost Calculator
Model an extensible employee cost calculator combining salary, tax, benefits, and a signed location adjustment. Discuss precise money handling, explicit missing policies, canonical identifiers, versioned configuration, reproducible breakdowns, and boundary-focused tests.
Software Engineering FundamentalsOnsite - AmazonMediumSoftware EngineerNegotiate an Impossible Project Timeline
This question assesses your ability to manage stakeholder expectations, use data to drive project scoping, and maintain professional integrity when facing unrealistic deadlines.
Behavioral & LeadershipOnsiteLeadershipProject ManagementStakeholder Management - AmazonMediumSoftware EngineerOrder Dependent Tasks and Identify Work to Rerun
Return any valid dependency order, detect cycles, and identify transitive reruns with a complete topological and reachability solution and order-independent validation.
Coding & AlgorithmsOnsite - AmazonMediumSoftware EngineerOvercoming Major Obstacles to Reach an Important Goal
A behavioral interview question asking the candidate to describe a time they overcame significant obstacles to reach an important goal. It tests ownership, persistence and judgment: how the obstacles were identified, which actions removed them, what result was achieved and what was learned.
Behavioral & LeadershipOnsite - AmazonMediumSoftware EngineerOwnership Beyond Your Role: Stepping Outside Your Area and Driving an Improvement
An Amazon behavioral question on ownership: describe taking on significant work outside your area of responsibility, and spotting a company improvement that you then drove to completion. It tests initiative, influence without authority, sustainable follow-through and measurable impact.
Behavioral & LeadershipOnsite - AmazonHardSoftware EngineerPrepare Leadership Principle Stories
This question assesses the ability to articulate past professional experiences using the STAR (Situation, Task, Action, Result) method, specifically focusing on demonstrating accountability, bias for action, and navigating high-stakes ambiguity.
Behavioral & LeadershipOnsiteBehavioralSTAR-MethodLeadership - AmazonMediumSoftware EngineerReplace Delimited Tokens in a String
This problem tests string manipulation, hash map lookups, and edge-case handling when parsing nested or malformed delimiters within a template string.
Coding & AlgorithmsOnsiteStringsHash MapParsing - AmazonMediumSoftware EngineerResolve a Conflict Between Metrics and Customer Feedback
This question tests your ability to troubleshoot conflicting signals in A/B testing and product analytics, requiring a structured approach to reconciling quantitative data with qualitative sentiment.
Analytics & ExperimentationOnsiteAnalyticsA/B TestingDecision Making - AmazonMediumSoftware EngineerResolve a Significant Disagreement with a Manager or Colleague
Explain a significant workplace disagreement through its underlying assumptions, respectful resolution, decision ownership, and follow-through.
Behavioral & LeadershipOnsite - AmazonMediumSoftware EngineerResolving a Meaningful Conflict
This behavioral question evaluates your ability to navigate professional disagreements using data, uphold high technical standards, demonstrate Amazon's 'Have Backbone; Disagree and Commit' principle, and preserve long-term team trust.
Behavioral & LeadershipOnsiteBehavioralAmazon LPConflict Resolution - AmazonMediumSoftware EngineerReview an existing architecture for risks
This question tests the ability to analyze a distributed system architecture for single points of failure, scalability bottlenecks, and operational risks, while balancing engineering trade-offs.
System DesignOnsiteScalabilityReliabilityArchitecture - AmazonMediumSoftware EngineerRoot-Cause Analysis Under Uncertainty
This question tests your structured approach to troubleshooting complex, ambiguous production issues and your ability to balance urgent mitigation with long-term systemic stability.
Behavioral & LeadershipOnsiteBehavioralRoot-Cause AnalysisIncident Management
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