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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 1651–1680 of 2629 results
- NetflixHardSoftware EngineerImplement a Versioned Key-Value Store
This question evaluates understanding of time-versioned data storage, related data-structure selection, handling of overwrite semantics at equal timestamps, and the ability to reason about correctness and complexity trade-offs.
Coding & AlgorithmsOnsite - NetflixMediumSoftware EngineerImplement ordering and undo executor
This question evaluates graph algorithm skills (topological ordering and cycle detection) and software design competencies related to command interfaces, undo semantics, and shared-state management.
Coding & AlgorithmsOnsite - NetflixMediumSoftware EngineerImplement weighted-eviction cache
This question evaluates understanding and practical implementation of data structures and algorithms for a weighted cache, including weighted eviction policies, use of ordered maps, and time-space complexity analysis.
Coding & AlgorithmsTechnical Screen - NetflixMediumSoftware EngineerReport Tree Levels and Balanced Subtrees
Tests traversing a binary tree stored in array (heap) layout to compute subtree heights and identify nodes rooted at height-balanced subtrees along with their tree levels.
Coding & AlgorithmsOnsitebinary-treeheapdepth-first-search - NetflixMediumSoftware EngineerReturn the longest contiguous subarray with all distinct values
This problem tests your ability to use the sliding window pattern and a hash map to maintain a range of unique elements efficiently in O(n) time.
Coding & AlgorithmsTechnical ScreenSliding WindowHash MapArrays - NetflixMediumSoftware EngineerReturn valid task order from prerequisites
This question evaluates proficiency in graph algorithms, notably topological sorting and cycle detection, as well as algorithmic complexity analysis and handling of dependency constraints.
Coding & AlgorithmsOnsite - NetflixMediumSoftware EngineerSimulate a TTL Cache with LRU Eviction
Implement a fixed-capacity key-value cache combining per-key TTL expiration with LRU eviction and O(1) average time per operation.
Coding & AlgorithmsTechnical ScreenCacheLRUHash Table - NetflixMediumSoftware EngineerSolve non-repeating show substring
This question evaluates understanding of sequence processing, uniqueness detection, and the use of auxiliary data structures to track previously seen elements when finding non-repeating contiguous subsequences, applied to show names instead of characters.
Coding & AlgorithmsTechnical Screen - NetflixMediumSoftware EngineerSolve sliding-window and disjoint-string-pairs tasks
This question tests the ability to combine sliding window techniques with bit manipulation or frequency counting to identify pairs of substrings that share no common characters.
Coding & AlgorithmsTechnical ScreenStringsBit ManipulationSliding Window - NewrelicHardSoftware EngineerMaximum Path Sum in an Indexed Binary Tree
This problem tests tree traversal techniques on an index-based representation, focusing on handling negative weights and memory efficiency via an iterative post-order approach.
Coding & AlgorithmsTechnical ScreenBinary TreeDynamic ProgrammingIterative Traversal - NewrelicHardSoftware EngineerProduct of Array Except Self Without Division
This problem tests array manipulation skills and the ability to optimize space complexity by using prefix and suffix product passes instead of division.
Coding & AlgorithmsTechnical ScreenArraysPrefix-SumOptimization - NextdoorMediumSoftware EngineerGroup Photos and Sort Feed Items
Implement a feed transformation that collapses consecutive photo posts by the same user into album items and then stably sorts the resulting feed by timestamp.
Coding & AlgorithmsTechnical ScreenArraysSortingTwo Pointers - NextdoorMediumSoftware EngineerImplement version string comparator with extensions
This question evaluates string parsing and comparison algorithms, handling of numeric versus lexical ordering and versioning semantics (including pre-release identifiers and ignored build metadata), within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - NextdoorHardSoftware EngineerSimulate Transaction Lock Scheduling
Implement an in-memory lock manager simulating shared and exclusive lock scheduling with strict FIFO queuing to prevent starvation.
Coding & AlgorithmsTechnical ScreenConcurrencyDesignQueue - NgrokMediumSoftware EngineerGenerate Color Feedback for a Word Guess
Generate green, yellow, or red feedback for each character in a word guess based on positional equality and presence anywhere in the answer. Follow the stated presence semantics, where misplaced duplicate letters remain yellow rather than consuming a limited match count.
Coding & AlgorithmsTechnical Screen - NielsenMediumSoftware EngineerPrefix Tree Supporting Insert, Exact Search and Prefix Queries
A coding problem that processes a sequence of insert, exact-match search and prefix-check operations on lowercase words and returns the boolean answers to the queries in order. It tests building a character-level word index and correctly separating whole-word matches from words that are only prefixes of others.
Coding & AlgorithmsOther - NioMediumSoftware EngineerFind kth smallest and count stair-climbing ways
This problem tests your ability to implement an efficient selection algorithm for order statistics and a dynamic programming approach to solve a classic combinatorial staircase problem.
Coding & AlgorithmsTechnical ScreenQuickSelectDynamic ProgrammingAlgorithms - NooksMediumSoftware EngineerImplement a BFS web crawler
This question evaluates proficiency in breadth-first search and graph traversal concepts applied to web crawling, including handling duplicate links, hostname filtering, and tracking visited URLs.
Coding & AlgorithmsOnsite - NotionMediumSoftware EngineerDesign a text editor with undo/redo
This question evaluates understanding of stateful data structures, operation/command semantics for reversible actions, undo/redo stack management, interface design, complexity analysis, and test coverage for mutable editors.
Coding & AlgorithmsTechnical Screen - NotionMediumSoftware EngineerFind Top Errors in Time Window
This problem tests your ability to process streaming log data within a sliding time window, aggregate frequencies using hash maps, and implement custom sorting logic.
Coding & AlgorithmsOnsiteHash MapSortingData Processing - NuroMediumSoftware EngineerAssign Robots to Nearest Pickup Items on a Grid with Obstacles
Given a grid with blocked cells, k delivery robots and k pickup items, assign every robot exactly one item by repeatedly matching the closest remaining robot-item pair under fixed tie-breaking rules. It tests shortest-path distances on grids with obstacles and careful, deterministic greedy assignment.
Coding & AlgorithmsTechnical Screen - NuroHardSoftware EngineerCheck Vertical Reflection Symmetry with Duplicate Points
Determine whether a multiset of 2D points is symmetric across a vertical line, preserving duplicate counts and allowing half-integer axes.
Coding & AlgorithmsTechnical Screen - NuroMediumSoftware EngineerFind Intersections Between Two Interval Lists
This problem tests your ability to efficiently merge and find overlaps between two sorted interval lists using a two-pointer approach.
Coding & AlgorithmsTechnical ScreenTwo PointersIntervalsSorting - NuroMediumSoftware EngineerFind gaps between intervals
This question evaluates interval manipulation and range-coverage reasoning, testing skills in sorting, merging overlapping ranges, and handling boundary conditions within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - NuroMediumSoftware EngineerGenerate Weighted Random Keys With Add And Remove
This problem tests your ability to efficiently manage a collection of weighted items and perform random sampling based on those weights, requiring O(log N) updates and lookups.
Coding & AlgorithmsTechnical ScreenData StructuresPrefix SumBinary Search - NuroMediumSoftware EngineerGroup points by distance threshold
This problem tests your ability to efficiently group spatial points based on proximity using graph traversal or clustering techniques while managing computational complexity.
Coding & AlgorithmsTechnical ScreenGraphsGeometryDSU - NuroMediumSoftware EngineerMap Weighted Random Draws to Indices
This problem tests your ability to efficiently map a series of random draws to specific indices based on provided weights using binary search techniques.
Coding & AlgorithmsTechnical ScreenArraysBinary SearchPrefix Sum - NuroMediumSoftware EngineerMaximize Revenue With Two Contiguous Delivery Routes
This problem tests dynamic programming and prefix-max techniques to find the maximum revenue of two non-overlapping subarrays with given length constraints.
Coding & AlgorithmsTechnical ScreenDynamic ProgrammingSliding WindowPrefix Sums - NuroMediumSoftware EngineerPick Two Trees for a Zipline That Maximizes Height Times Span
A coding question that recasts the classic two-line container problem as choosing two trees in a row to string a zipline between. It asks for the largest value of the shorter tree's height times the distance between the two trees, over arrays of up to 100,000 heights, and tests efficient pair selection.
Coding & AlgorithmsTechnical Screen - NuroMediumSoftware EngineerReveal a Minesweeper Board
This problem tests recursive graph traversal (DFS/BFS) and grid manipulation logic to implement the recursive uncovering mechanism found in Minesweeper.
Coding & AlgorithmsTechnical ScreenDFSRecursion2D-Grid
Netflix
Nextdoor
Nielsen
Notion
Nuro