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 481–510 of 5874 results
- AmazonEasySoftware EngineerMake Progress When Requirements Are Ambiguous
This question assesses the candidate's ability to navigate project uncertainty by balancing proactive momentum with risk management and stakeholder alignment.
Behavioral & LeadershipTechnical ScreenLeadershipAmbiguityCommunication - 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 EngineerManipulate time-series with Pandas groupby
This question evaluates proficiency in time-series data manipulation, including timezone-aware datetime parsing and DST handling, groupby and rolling-window aggregations, resampling to fill calendar gaps, and user-level retention and DAU calculations using idiomatic, vectorized Pandas or SQL operations.
Data Manipulation (SQL/Python)Technical Screen - AmazonMediumSoftware EngineerMax total of k consecutive bags over disjoint valued segments, modulo 1e9+7
Disjoint segments [l, r, v] give every bag from position l to r the value v, and all other bags in an endless row are empty. Find the largest total over k consecutive bags, returned modulo 1,000,000,007, when k and positions reach 10^9, testing window sums over sparse ranges that cut through segments.
Coding & AlgorithmsOnline Assessment - AmazonHardSoftware EngineerMaximize Money in K Consecutive Bags
This problem tests your ability to efficiently manage interval operations and sliding window logic on a sparse coordinate system.
Coding & AlgorithmsTechnical ScreenSliding WindowSortingTwo Pointers - AmazonMediumSoftware EngineerMaximize Value Under a Budget
This problem tests your ability to solve a variation of the 0/1 Knapsack problem where items must be selected to maximize total value without exceeding a specific budget constraint.
Coding & AlgorithmsTechnical ScreenDynamic ProgrammingOptimizationAlgorithms - AmazonMediumSoftware EngineerMaximize capacity with primary-backup pairing
This problem tests your ability to optimize resource pairing using greedy strategies or sorting to maximize total capacity under specific pair-wise constraints.
Coding & AlgorithmsOnline AssessmentGreedySortingOptimization - AmazonMediumSoftware EngineerMaximize credits with limited skips
This question evaluates algorithm design and optimization skills in resource allocation under constraints, focusing on decision-making to maximize credits when turn-taking and limited skips affect processing.
Coding & AlgorithmsOnline Assessment - AmazonHardSoftware EngineerMaximize memory capacity with primary-backup servers
This question evaluates algorithmic reasoning in constrained pairings and resource allocation, focusing on maximizing aggregate memory under pairwise feasibility constraints while managing large input sizes.
Coding & AlgorithmsOnline Assessment - AmazonHardSoftware EngineerMaximize protected population and bitwise AND
This problem tests your ability to optimize resource allocation using greedy approaches with priority queues and bitwise bit-manipulation techniques to satisfy mathematical constraints.
Coding & AlgorithmsOnline AssessmentGreedyBit ManipulationPriority Queue - AmazonMediumSoftware EngineerMaximize protected population with one-step guard shifts
This question evaluates the ability to reason about constrained local moves and optimize a numerical objective over an array, testing skills in array manipulation, combinatorial optimization, and interpretation of binary state representations.
Coding & AlgorithmsOnline Assessment - AmazonHardSoftware EngineerMaximize total bandwidth of data channel pairs
This question evaluates a candidate's ability to design efficient algorithms for combinatorial optimization and selection under constraints, testing understanding of array manipulation, ordered pair counting, and aggregation of bandwidth sums.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerMaximize weighted subsequence pairs with wildcards
This question evaluates combinatorial counting, string manipulation, and optimization under constraints, along with handling large-number results via modular arithmetic.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerMaximum Profit Assigning Tasks to Exact-Skill Workers Plus One Wildcard Worker
Assign tasks to workers whose skill must exactly equal each task's requirement, with one extra worker who may take any single task, and return the maximum total profit. It tests making the best use of limited workers per skill level, the single wildcard worker, and large sums that exceed 32 bits.
Coding & AlgorithmsOther - 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 K Sorted Arrays Without Duplicates
This problem tests your ability to efficiently merge multiple sorted sequences into a single sorted stream while managing duplicate values using a priority queue.
Coding & AlgorithmsTechnical ScreenHeapsSortingArrays - AmazonMediumSoftware EngineerMerge Multiple Sorted Arrays
This problem tests your ability to efficiently merge multiple sorted arrays into a single sorted list using a priority queue (min-heap) to optimize performance.
Coding & AlgorithmsTechnical ScreenArraysHeapSorting - AmazonHardSoftware EngineerMerge Two Job Queues With the Fewest Urgency Inversions
Interleave two digit sequences, keeping each one's order, so that the merged sequence has as few inversions as possible. Tests charging each inversion to its earlier element, which turns the problem into an O(mn) grid DP.
Coding & AlgorithmsOnline Assessmentdynamic-programmingstringsinversions - 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 - AmazonHardSoftware EngineerMerge two sorted arrays in-place
This problem tests your ability to manipulate arrays in-place while managing constraints to avoid unnecessary data movement or auxiliary space usage.
Coding & AlgorithmsTechnical ScreenArraysTwo PointersIn-place - 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 Branch Merge Conflicts
This question evaluates understanding of combinatorial optimization, set operations, and order-dependent state management, requiring reasoning about how commit file modifications accumulate across branch merges.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerMinimize Circular Redistribution Cost
This problem tests your ability to handle circular array indexing and perform efficient redistributions using modulo arithmetic and prefix sum concepts.
Coding & AlgorithmsOnline AssessmentArraysModuloOptimization - AmazonMediumSoftware EngineerMinimize Global Replacements to Make Values Contiguous
Determine the minimum number of global value replacements needed so that every remaining value in an array forms a single contiguous block.
Coding & AlgorithmsOnline Assessmentintervalsgreedyhash-table - AmazonMediumSoftware EngineerMinimize Grid Inconvenience by Adding One Delivery Center
Add at most one delivery center to minimize the maximum Chebyshev distance from ordinary grid cells to their nearest center.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerMinimize Points Used Across Multiple Reward Programs
Minimize the number of indivisible reward points needed to meet or exceed a microdollar target across programs with different values and finite balances, returning failure when coverage is impossible.
Coding & AlgorithmsTechnical Screen - 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
Amazon