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 5281–5310 of 5874 results
- TeslaHardSoftware EngineerDesign a Distributed Blob Storage System for Build Artifacts
Design a distributed storage system for build artifacts, similar to a distributed NoSQL database but storing opaque blobs with looser ACID requirements. It tests separating immutable data from consistent metadata, upload atomicity, replication and repair, handling download fan-out, and safe retention and garbage collection.
System DesignOnsite - TeslaEasySoftware EngineerDesign a JSON Merge API with Pluggable Behaviors
Implement a non-mutating JSON merge utility with recursive object handling, configurable array merge strategies, and an extensible design for custom merge policies.
Software Engineering FundamentalsTechnical Screenjsonrecursionapi-design - TeslaHardSoftware EngineerDesign a Supercharger Backend: Billing, Stall Telemetry and Nearest Available Charger
System design question on the backend for an electric-vehicle fast-charging network: billing each session by the energy delivered, storing stall health telemetry long term, and showing drivers the nearest available charger with its price. Probes secure device communication, DNS and routing, local buffering and sync versus async choices.
System DesignTechnical Screen - TeslaMediumSoftware EngineerDesign a Video Sharing Platform
Design a resilient, large-scale video sharing and streaming platform that handles multi-gigabyte uploads, asynchronous transcoding, and low-latency global delivery. This question tests your ability to design chunked upload protocols, idempotent processing pipelines, and CDN-backed adaptive streaming architectures.
System DesignOnsiteDistributed SystemsVideo StreamingCDN - TeslaMediumSoftware EngineerDesign a contiguous segment allocator
This question evaluates a candidate's competency in designing and implementing efficient data structures for interval management, contiguous memory allocation, fragmentation handling, tag-based resource tracking, and algorithmic complexity analysis.
Coding & AlgorithmsTechnical Screen - TeslaMediumSoftware EngineerDesign an Order Fulfillment System
Design an order-fulfillment system and explain its major components, data flow, and reliability trade-offs.
System DesignOnsite - TeslaHardSoftware EngineerDesign concurrency-safe shared payment account API
Design concurrency-safe shared payment account API 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 - TeslaMediumSoftware EngineerDesign synchronization for water molecule assembly
This question evaluates concurrency and synchronization skills, including thread coordination, use of locks/semaphores/condition variables, and reasoning about safety and liveness properties in concurrent systems.
System DesignHR Screen - TeslaMediumSoftware EngineerDiscuss Distributed-System Experience with Go, Java, Spark, and Elasticsearch
Tests your ability to clearly explain distributed systems architecture, justify technology selections (such as Go, Java, Spark, and Elasticsearch), and discuss operational bottlenecks and fault tolerance from real production experience.
Software Engineering FundamentalsHR ScreenDistributed SystemsGoJava - TeslaMediumSoftware EngineerFind latency pairs with minimal difference
This question evaluates array manipulation, pairwise comparison, and algorithmic efficiency by requiring identification of minimal absolute differences and construction of ordered latency pairs.
Coding & AlgorithmsTechnical Screen - TeslaHardSoftware EngineerFlatten a Linked List with Nested Side Branches into One Doubly Linked List
A linked list whose nodes may each carry one side branch, with branches nested like a binary tree, must be flattened into a single doubly linked list with every branch spliced between its parent and the parent's original successor. It tests pointer rewiring, ordering rules for nested branches, and handling very deep nesting.
Coding & AlgorithmsOnsite - TeslaHardSoftware EngineerFrom a Monorepo Commit to an Over-the-Air Vehicle Update, and Choosing What to Build
Trace everything that happens between an engineer pushing a commit to a monorepo and the resulting software being installed on customers' cars, then explain how the monorepo decides which targets to build and test and in what order. It tests CI and release gating, artifact provenance, staged over-the-air rollout, safe in-vehicle installation, and dependency-graph builds.
System DesignOnsite - TeslaEasySoftware EngineerGenerate Per-Position Guess Feedback
This problem tests your ability to process strings and manage state (character frequency) to determine exact matches versus partial matches, commonly used in word-guessing games.
Coding & AlgorithmsOnline AssessmentStringHash MapArray - TeslaEasySoftware EngineerHandle API Errors with Python Requests
Tests your ability to write resilient HTTP client logic in Python using requests, distinguishing between retryable and non-retryable errors, handling rate limits, and safely parsing JSON.
Software Engineering FundamentalsTechnical Screenpythonnetworkingapi - TeslaMediumSoftware EngineerHow to Identify Best Battery Group
This question evaluates understanding of statistical inference, experimental design, and metric construction for binary test outcomes, including defining composite quality measures, handling unequal sample sizes, quantifying uncertainty, and addressing multiple-comparison issues.
Machine LearningOnsite - TeslaHardSoftware EngineerImplement Reduce and Derive Map and Filter from It
Explain reduce semantics, derive ordered map and filter with a reducer, and compose them over table rows while handling empty input and accumulator costs.
Software Engineering FundamentalsTechnical Screen - TeslaHardSoftware EngineerImplement a Rollback Key-Value Store
This problem tests your ability to design a data structure that supports basic key-value operations with an added transactional rollback mechanism using a stack-based approach.
Coding & AlgorithmsTechnical ScreenData StructuresStackVersioning - TeslaMediumSoftware EngineerInvestigate Recurring Bugs and Prevent the Same Failure from Returning
Implement an invariant analysis engine to identify recurring bugs across production incident traces, pin down the earliest violating step, and flag failures recurring above a frequency threshold.
Software Engineering FundamentalsHR ScreenDebuggingTestingData Processing - TeslaMediumSoftware EngineerOptimize Trapping Rain Water
This question evaluates algorithmic problem-solving with arrays and analysis of time-space trade-offs in the Coding & Algorithms domain, and is commonly asked to assess a candidate's ability to transform brute-force approaches into efficient linear-time solutions while reasoning about memory usage.
Coding & AlgorithmsTechnical Screen - TeslaMediumSoftware EngineerReason About Alternating Positive and Negative Values
This problem tests your ability to manipulate array elements in-place while managing constraints on stability and the treatment of special values like zeros.
Software Engineering FundamentalsOnsiteArraysTwo-PointersIn-place - TeslaMediumSoftware EngineerReason About Character Paths in a Grid
Tests depth-first search with backtracking on a 2D grid, covering cycle prevention, branching path exploration, termination criteria, and lexicographical ordering.
Software Engineering FundamentalsOnsitedfsbacktrackingmatrix - TeslaHardSoftware EngineerSenior Project Deep Dive: Design Rationale, Your Most Complex Project, Questions for the HM
A senior infrastructure loop probes past work in a resume deep dive on design rationale and rejected alternatives, then the hiring manager asks for your most complex project and your questions for them. It tests whether project scope meets the senior bar, clear ownership, measurable impact, and the habit of asking probing follow-up questions.
Behavioral & LeadershipOnsite - TeslaEasySoftware EngineerShortest Bridge to Connect Two Islands
Tests matrix traversal techniques, specifically using DFS/BFS to identify connected components and multi-source BFS to find the shortest path between them.
Coding & AlgorithmsOnsitegraphbfsdfs - TeslaMediumSoftware EngineerSolve classic array, graph, and parsing problems
This multi-part question evaluates algorithmic problem-solving and data-structure competency, covering expression parsing, array and sequence manipulation, sorting-based counting, interval merging, graph traversal/union-find, in-place rearrangement, hashing for set operations, and DAG/topological ordering within the Coding & Algorithms domain.
Coding & AlgorithmsHR Screen - TeslaHardSoftware EngineerTroubleshoot Processes That Randomly Crash While Being Created on Linux Cluster Hosts
Processes scheduled onto a Linux server cluster randomly crash while being created, and the interviewer plays the system while you hunt for a planted cause. It tests Linux troubleshooting commands for processes, memory, network and disk I/O, and reasoning about how cron jobs spawning tens of thousands of threads can break other workloads.
Software Engineering FundamentalsOnsite - TeslaMediumSoftware EngineerUse Metrics and Logs to Establish a Production Root Cause
This question tests your systematic approach to troubleshooting production incidents in distributed architectures using metrics, distributed tracing, structured logs, and change audit trails.
Software Engineering FundamentalsHR ScreenObservabilityDistributed SystemsSite Reliability - TestGorillaMediumSoftware EngineerAssess Spring IoC, AOP, JDBC, Security
Assess Spring IoC, AOP, JDBC, Security evaluates engineering fundamentals, trade-offs, examples, pitfalls, and operational implications in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Software Engineering FundamentalsOnline Assessment - The Trade DeskEasySoftware EngineerAdd a click listener to a button
Add a click listener to a button evaluates requirements, assumptions, structured reasoning, trade-offs, and verification in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Software Engineering FundamentalsTechnical Screen - The Trade DeskMediumSoftware EngineerCalculate Bowling Game Score
This problem tests your ability to manage state and look-ahead logic when processing a sequence of events (bowling rolls) governed by specific conditional scoring rules.
Coding & AlgorithmsOnsiteArraysLogicSimulation - The Trade DeskMediumSoftware EngineerDesign a Recipe Manager
Evaluates API and in-memory data structure design, search and sorting semantics, user-associated operations, versioning/audit history, data normalization, and edge-case handling within the Software Engineering Fundamentals domain.
Software Engineering FundamentalsOnline Assessment
Tesla
The Trade Desk