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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 511–540 of 5874 results
- AmazonHardSoftware EngineerMinimize operations to reduce price difference
This question evaluates algorithm design and array-manipulation skills, focusing on reasoning about constrained transfers of value, invariants, and the minimization of operation counts under a fixed per-operation bound.
Coding & AlgorithmsOnline Assessment - AmazonHardSoftware EngineerMinimize time for two handlers
This problem tests your ability to use dynamic programming or greedy strategies with state tracking to minimize the total completion time of tasks assigned to two distinct handlers.
Coding & AlgorithmsOnline AssessmentDynamic ProgrammingOptimizationGreedy - AmazonMediumSoftware EngineerMinimum Bills and Coins to Make Change
This problem tests your ability to determine the optimal combination of coins and bills to achieve a specific target amount, while managing limited inventory and precision issues.
Coding & AlgorithmsTechnical ScreenGreedyDynamic ProgrammingArithmetic - AmazonMediumSoftware EngineerMinimum Drone Delivery Time on a Ring of Hubs
This problem tests your ability to calculate optimal traversal distances on a circular path, requiring the application of modular arithmetic and greedy logic to minimize movement between sequential points.
Coding & AlgorithmsTechnical ScreenAlgorithmsGreedyModular Arithmetic - 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 EngineerMinimum Path Length Through a Grid With One Allowed Cell Conversion
This problem tests your ability to adapt BFS to a state-space graph where an additional dimension represents the remaining capacity to modify the grid, requiring efficient state tracking to find the shortest path.
Coding & AlgorithmsOnline AssessmentBFSGraphShortest Path - AmazonHardSoftware EngineerMinimum Priority Conflicts When Interleaving Two Lowercase Strings
From an Amazon online assessment: merge two lowercase strings into one while keeping each string's internal order, where smaller letters have higher priority and every lower-priority letter placed before a higher-priority one counts as a conflict. Return the minimum possible number of conflicts over all valid merges.
Coding & AlgorithmsOnline Assessment - 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 - AmazonHardSoftware EngineerOptimize attention for long sequences
Optimize attention for long sequences evaluates ML product requirements, data/labeling, modeling, serving architecture, evaluation, monitoring, and trade-offs in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
ML System DesignTechnical Screen - AmazonMediumSoftware EngineerOptimize with a cache/hash map
Amazon software-engineer technical-screen coding follow-up: take an existing script (e.g. one that resolves file paths or parses license strings) and design a hash-map-backed in-memory cache to speed up repeated lookups. It tests choosing a cacheable computation, defining normalized keys and values, estimating hit rate, picking an eviction policy (LRU/LFU/TTL), invalidating on file mtime/content-hash changes, ensuring concurrency safety, and analyzing time and space complexity before and after caching.
Coding & AlgorithmsTechnical Screen - 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 EngineerOrganize a Product Initiative Across Stakeholders
This question assesses a candidate's ability to drive complex, cross-functional projects by aligning stakeholders, managing interdependencies, and adapting to shifting priorities.
Behavioral & LeadershipTechnical ScreenBehavioralLeadershipProject Management - AmazonMediumSoftware EngineerOvercome an Obstacle That Threatens Delivery
Describe a significant obstacle that threatened an outcome you owned and required more than extra personal effort. Explain how you diagnosed the true constraint, changed the plan, communicated trade-offs, aligned people, and reached a responsible result.
Behavioral & LeadershipTechnical Screen - 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 - AmazonEasySoftware EngineerPrint all odd numbers from an integer list
This question tests the ability to filter a collection based on a parity condition and handle potential overflow or negative integer scenarios.
Coding & AlgorithmsTechnical ScreenArraysBasic LogicFiltering - AmazonMediumSoftware EngineerPrioritize Under a Tight Deadline
This question evaluates a software engineer's skills in prioritization, resource management, stakeholder communication, risk assessment, and leadership within project delivery, and is categorized as Behavioral & Leadership testing project management and decision-making under constraints.
Behavioral & LeadershipTechnical Screen - AmazonMediumSoftware EngineerRate Engineering Work Simulation Responses
This situational judgment exercise evaluates your ability to balance technical quality, customer impact, ownership, and stakeholder communication when resolving high-stakes engineering dilemmas under tight deadlines.
Behavioral & LeadershipOnline Assessmentsituational-judgmentleadership-principlesamazon-oa - AmazonMediumSoftware EngineerRearrange Digits Without Adjacent Sums Above Nine
Rearrange a multiset of digits into the lexicographically smallest string such that every adjacent pair sums to at most nine, or return an empty string if impossible.
Coding & AlgorithmsTechnical Screengreedybacktrackingstring - AmazonMediumSoftware EngineerRearrange a String So Adjacent Characters Differ
Construct the lexicographically smallest rearrangement of a lowercase string with no equal adjacent characters, checking feasibility after each deterministic choice and returning empty when separation is impossible.
Coding & AlgorithmsTechnical Screen - AmazonMediumSoftware EngineerRecover from a Missed Deadline
Tests your ability to take ownership of project setbacks, proactively communicate risks, make pragmatic trade-offs under pressure, and establish lasting process improvements.
Behavioral & LeadershipTechnical ScreenBehavioralOwnershipDeliver Results - AmazonMediumSoftware EngineerReflect on criticism and deadlines
Reflect on criticism and deadlines evaluates behavioral evidence, ownership, communication, trade-offs, and measurable outcomes in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Behavioral & LeadershipTechnical Screen - AmazonMediumSoftware EngineerReflect on self, goals, learning, competitions
Prepare behavioral answers about self-description, goal planning, recent research-paper learning, and competition reflection. Includes structured examples, goal frameworks, paper-summary format, and learning-focused competition analysis.
Behavioral & LeadershipTechnical Screen - AmazonMediumSoftware EngineerRepair a Django Post-Creation Endpoint and Its React Contract
Implement and repair a Django REST Framework view and serializer for post creation to satisfy frontend React contract requirements, ensure atomic tag associations, and enforce authenticated author assignment.
Software Engineering FundamentalsOnline AssessmentDjangoREST APIDatabase Transactions - 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 Conflict and Challenge Project Decisions
This question assesses a candidate's ability to navigate professional disagreements by balancing data-driven technical reasoning with interpersonal tact, demonstrating ownership and the ability to influence stakeholders.
Behavioral & LeadershipTechnical ScreenConflict ResolutionLeadershipCommunication - AmazonMediumSoftware EngineerResolve Package Dependencies with Cycle Detection
This problem tests your ability to perform a topological sort on a directed graph while identifying cyclic dependencies to ensure a safe build order.
Coding & AlgorithmsTechnical ScreenGraphDFSTopological Sort - 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
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