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 4261–4290 of 5874 results
- OtherMediumSoftware EngineerSolve a Set of Probability and Quantitative Reasoning Problems
Work through fourteen quantitative interview problems covering probability, counting, expectation, algebra, logical constraints, and rate reasoning. Each result should be auditable, use the correct sample space, and state any interpretation that affects the calculation.
Statistics & MathOnline Assessment - OtherMediumSoftware EngineerSpreadsheet Formulas, Dependencies, and Circular References
Implement spreadsheet formulas with dependency updates, repeated references, unset cells, and cycle detection that recovers after formulas change.
Coding & AlgorithmsOther - OtherMediumSoftware EngineerTest Severity Filtering with Contract-Distinguishing Cases
Test severity filtering with independent expected results, inclusive boundaries, misleading message text, missing fields, empty records, and preserved order and duplicates.
Software Engineering FundamentalsOnsite - OtherEasySoftware EngineerTrack Workers, Sessions, Promotions, and Bonus Pay
Implement worker sessions, current metadata, promotions, ordered filtering, and time-clipped compensation with historical rates and non-stacking double-pay intervals.
Coding & AlgorithmsOnline Assessment - OtherEasySoftware EngineerValidate Nested Parentheses, Brackets, and Braces
Validate nested parentheses, brackets, and braces with correct handling of empty input, mismatched closing symbols, and unfinished groups.
Coding & AlgorithmsOnline Assessment - OthersMediumSoftware EngineerAnswer k-step ancestor queries in a rooted tree
This problem tests your ability to optimize ancestor lookups in a tree using the Binary Lifting technique to achieve logarithmic query time.
Coding & AlgorithmsOnline AssessmentTreesBinary LiftingDynamic Programming - OthersMediumSoftware EngineerWrite a quarterly SQL report and a bash max-file script
This problem tests your ability to perform conditional aggregation in SQL for time-series reporting and your proficiency in recursive shell scripting for system administration tasks.
Software Engineering FundamentalsOnline AssessmentSQLBashData Aggregation - Otter.AiMediumSoftware EngineerDesign a Fault-Tolerant Meeting Bot Allocation System
Design the infrastructure between a web UI and a bot pool. Connect requirements and APIs to data modeling, consistency, scaling, failure recovery, observability, and the important design trade-offs.
System DesignOnsite - Otter.AiMediumSoftware EngineerDesign a Google Docs-Style Real-Time Collaborative Editing Backend
Design the backend of a Google Docs-style editor in which many users edit the same document in real time and every copy converges to the same text. Tests concurrency control for simultaneous edits, routing of document sessions, operation storage and revision history, presence, and recovery from disconnects and server failures.
System DesignOnsite - Otter.AiMediumSoftware EngineerEvaluate Arithmetic Expressions
This problem tests your ability to parse and evaluate a string representing a mathematical expression with basic operator precedence, typically requiring a stack-based approach or a recursive descent parser.
Coding & AlgorithmsTechnical ScreenStackString ParsingMath - Otter.AiEasySoftware EngineerExtend a Key-Value Store with Commits and Explicit Rollover Semantics
Design a versioned key-value store supporting staging, atomic commits, point-in-time snapshot reads, and automated rollover compaction.
System DesignTechnical ScreenKey-Value StoreMVCCConcurrency - Otter.AiMediumSoftware EngineerFewest Adjacent-GCD Operations to Turn Every Array Element into 1
Given an array of positive integers, find the fewest operations that make every element 1, where each operation replaces one of two neighboring values with their greatest common divisor, or return -1 if it cannot be done. Tests GCD properties, lower-bound reasoning and careful case analysis on small arrays.
Coding & AlgorithmsOnsite - Otter.AiMediumSoftware EngineerFixed-Width Text Display
This question tests a candidate's ability to implement greedy line-packing and space-distribution algorithms, core string manipulation skills evaluated in software engineering interviews. It assesses practical application of text layout logic, including handling edge cases like single-word lines and justified formatting with uneven space distribution.
Coding & AlgorithmsTechnical Screen - Otter.AiMediumSoftware EngineerImplement an Arithmetic Expression Evaluator
This problem tests your ability to parse and evaluate mathematical expressions containing non-negative integers, addition, subtraction, multiplication, and nested parentheses using a stack-based approach or recursion.
Coding & AlgorithmsTechnical ScreenStackParsingMath - Otter.AiMediumSoftware EngineerIn-Memory Key-Value Store with Nested Transactions
This problem tests the ability to implement a nested transactional key-value store using stack-based state management and scope shadowing.
Coding & AlgorithmsTechnical ScreenHash MapStackTransactions - Otter.AiEasySoftware EngineerValidate Password Against Multiple Rules
This problem tests your ability to efficiently iterate through a string while maintaining multiple state-based flags to satisfy diverse validation criteria.
Coding & AlgorithmsTechnical ScreenStringsValidationAlgorithms - OuraMediumSoftware EngineerImplement Server Number Allocation
This problem tests your ability to manage and reuse resources efficiently using data structures that allow for logarithmic time allocation and deallocation within partitioned namespaces.
Coding & AlgorithmsOnline AssessmentData StructuresHeapHash Map - PalantirMediumSoftware EngineerApply Item Coupons with Exact Per-Item Cent Rounding
Implement a checkout calculation engine that applies item-specific coupons to cart lines using exact banker's rounding (round-half-to-even) per unit and returns the final cart total in integer cents.
Coding & AlgorithmsOnline AssessmentSimulationData StructuresMath - PalantirMediumSoftware EngineerDesign a Real-Time Collision Warning System for Drones in Shared Airspace
Design a system that ingests live telemetry from many drones sharing airspace and warns operators when two of them are predicted to come too close. It tests streaming ingestion, spatial partitioning, trajectory-based conflict prediction, alert delivery and reliability under the latency and safety demands of a real-time system.
System DesignOther - PalantirEasySoftware EngineerDesign a Server Metrics Monitor
This question evaluates knowledge of distributed system design, scheduling and orchestration, concurrency, fault tolerance, and observability in the context of large-scale metric collection.
System DesignOnsite - PalantirMediumSoftware EngineerDesign a Tool Registration, Discovery and Safe Execution Layer for LLM Agents
A senior system design question about the platform that lets LLM-driven agents discover and call backend tools. It probes tool registration and discovery, schema definition versus runtime validation of model-generated arguments, the interface between backend services and agents, and patterns for executing actions safely.
System DesignOther - PalantirMediumSoftware EngineerDesign a compliant multi-tenant analytics platform
This question tests the ability to design a secure, scalable multi-tenant analytics platform that enforces strict data isolation and fine-grained access control while maintaining rigorous audit trails.
System DesignOnsiteMulti-tenancySecurityABAC - PalantirHardSoftware EngineerDesign a scalable interview question bank
Design a scalable interview question bank evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignTechnical Screen - PalantirMediumSoftware EngineerDiscuss logistics and compensation
Discuss logistics and compensation 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 - PalantirEasySoftware EngineerFind Shortest Paths in Road Network
This question evaluates understanding of graph data structures and shortest-path concepts, including correct modeling of undirected edges, unweighted versus weighted pathfinding, and algorithmic time and space complexity.
Coding & AlgorithmsOnsite - PalantirMediumSoftware EngineerGroup employees by shared interests
This question evaluates a candidate's competency in organizing and querying collections, mapping relationships between entities, and reasoning about algorithmic time and space complexity within data structures and grouping operations.
Coding & AlgorithmsTechnical Screen - PalantirMediumSoftware EngineerHandle value conflicts and disagreeing with leadership
This question evaluates ethical judgment, professional disagreement, stakeholder communication, and ownership/accountability within leadership and team contexts for software engineers.
Behavioral & LeadershipOnsite - PalantirEasySoftware EngineerMerge K Individually Sorted Integer Arrays Into One Sorted Array
Merge k integer arrays, each sorted in non-decreasing order, into one sorted array that keeps every duplicate. The interviewer asked for the two-pointer method and divide and conquer, so the problem tests merging sorted sequences and how the cost grows with the number of arrays.
Coding & AlgorithmsTechnical Screen - PalantirMediumSoftware EngineerOptimize Coupon Selection Under a Twenty-Point Budget
Optimize coupon activations under a 20-point budget to maximize monetary savings while handling item/category stacking, savings caps, rounding, and tie-breaking.
Software Engineering FundamentalsOnline AssessmentAlgorithmsDynamic ProgrammingBit Manipulation - PalantirMediumSoftware EngineerReflect on experiences and teamwork
Reflect on experiences and teamwork 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
Otter.Ai
Palantir