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Coding & Algorithms 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 1471–1500 of 3276 results
- Jane StreetHardSoftware EngineerSnake Game: Minimum Moves to Reach the Apple
This question evaluates proficiency in state-space modeling, constrained grid pathfinding, and dynamic collision handling, testing skills in shortest-path reasoning and movement legality within the Coding & Algorithms domain; the level of abstraction is practical application of algorithmic techniques to simulate evolving game states rather than purely theoretical analysis. It is commonly asked in technical interviews because it requires reasoning about evolving constraints and reachable states, demonstrating an applicant's ability to model complex movement rules and perform effective search under limited grid and body-size constraints.
Coding & AlgorithmsTechnical Screen - Jane StreetMediumQuantitative TraderSolve queue switch and coin change puzzles
This two-part question evaluates probabilistic reasoning about expected waiting times with random queue switching and combinatorial/algorithmic counting for coin-change combinations, testing skills in probability, expectation and order statistics as well as combinatorics and dynamic programming within the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - Jane StreetEasySoftware EngineerSort trade executions into a canonical order
This question evaluates a candidate's ability to enforce deterministic ordering and data normalization of time-series trade execution records, testing competencies in multi-key sorting, tie-breaking logic, and performance with large inputs.
Coding & AlgorithmsOnsite - Jane StreetEasySoftware EngineerStack Machine Interpreter with Typed Int and String Values
This question evaluates understanding of stack-machine semantics, runtime type representation and preservation of distinct integer versus string values, plus handling mixed-type ADD behavior and output semantics.
Coding & AlgorithmsTechnical Screen - Jane StreetMediumQuantitative TraderTwo Opaque Boxes: Place or Take for Maximum Expected Payoff
This question evaluates probabilistic reasoning, expected-value analysis, and sequential decision-making under uncertainty, testing competency in stochastic modeling, combinatorics, and optimization.
Coding & AlgorithmsOnsite - Jump TradingEasySoftware EngineerExpand a Serial and Parallel Task Composition Specification
Tests parsing structured workflow specifications with nested delimiters and quoted literals, then generating all concrete serial execution paths via Cartesian expansion.
Coding & AlgorithmsOnline AssessmentString ParsingRecursionBacktracking - Jump TradingMediumSoftware EngineerExplain C++ vector, unordered_map, and virtual functions
Explain C++ vector, unordered_map, and virtual functions evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsTechnical Screen - Jump TradingEasySoftware EngineerIdentify Files That Need Synchronization
Determine which files from a source system need to be synchronized to a destination system based on permissions, presence, size, and modification timestamps.
Coding & AlgorithmsOnline Assessmenthash-tablestringimplementation - Jump TradingMediumSoftware EngineerIdentify read-only files from permission records
This problem tests your ability to parse Unix-style permission strings and implement filtering logic based on bitmask-like constraints.
Coding & AlgorithmsOnline AssessmentString ParsingFilteringAlgorithms - Jump TradingEasySoftware EngineerLargest Subset With Positive Bitwise AND
This problem tests your understanding of bitwise operations and greedy array partitioning to maximize the size of a subset that results in a non-zero bitwise AND.
Coding & AlgorithmsTechnical ScreenBit ManipulationGreedyArrays - Jump TradingMediumQuantitative ResearcherMaintain a Fixed-Window Rolling Mean in Constant Time
Implement an efficient sliding-window mean calculation over a stream or sequence of signed integers. Tests sliding window mechanics, constant-time updates, handling integer overflow, and edge cases.
Coding & AlgorithmsOnsiteSliding WindowArraysStreaming - Jump TradingMediumMachine Learning EngineerSolve stock trading with pattern rules
This set of problems evaluates algorithmic skills in pattern recognition, state management, and sequence processing, specifically testing pattern-based decision rules on time-series stock data and iterative substring elimination in string processing within the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - Jump TradingMediumMachine Learning EngineerSolve stock-pattern trading and substring elimination
This question evaluates algorithmic skills in array pattern recognition and string processing, specifically detecting day-to-day sign patterns for simulated trading and repeated elimination of fixed two-character substrings; it belongs to the Coding & Algorithms domain for a Machine Learning Engineer position and targets practical application of linear-time, constant-extra-space techniques. It is commonly asked to evaluate efficient O(n) algorithm design, handling of stateful streaming simulations and in-place string reduction under tight time/space constraints, and correctness reasoning for edge cases.
Coding & AlgorithmsOnline Assessment - KaratMediumSoftware EngineerJoin tables to map userId to name
This question evaluates a candidate's skills in relational data joining, data integration, and numeric reconciliation for mapping userId to customerName across multiple tables.
Coding & AlgorithmsTechnical Screen - KaratMediumSoftware EngineerValidate password and list rule violations
This question evaluates string-processing and input-validation skills, including case-insensitive substring detection, character class checks, pattern matching for special symbols, and handling edge cases like consecutive character limits.
Coding & AlgorithmsTechnical Screen - KneronMediumSoftware EngineerCompute sum of minima with removals
Compute sum of minima with removals evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsOnline Assessment - Lead BankMediumSoftware EngineerImplement Stock Price Query APIs
This question evaluates skills in time-series data modeling, API and data-structure design, transactional (atomic) batch updates, concurrency control, and date/time parsing for stock price records.
Coding & AlgorithmsTechnical Screen - Lead BankMediumSoftware EngineerImplement a versioned hash map with snapshot
This question evaluates understanding of versioned hash maps, time-travel key-value stores, temporal retrieval semantics, and snapshot creation, testing algorithms and data-structure design in the Coding & Algorithms domain and emphasizing practical implementation with conceptual reasoning about correctness and timestamp semantics.
Coding & AlgorithmsTechnical Screen - Lead BankMediumSoftware EngineerProcess Calendar Events with Deletion, Pagination, and Overlap Queries
This problem tests your ability to manage a dynamic set of time-interval events using a data structure that allows for logarithmic insertions, deletions, and efficient range-based queries.
Coding & AlgorithmsOnsiteData StructuresIntervalsPagination - Lead BankMediumSoftware EngineerProcess a Mutable Stock-Price Log
Design an in-memory mutable stock price log that supports recording prices, tracking update history, calculating percentage changes across dates, and comparing performance between tickers.
Coding & AlgorithmsOnsitehash-tabledesigndata-structures - Lead BankMediumSoftware EngineerSolve friend recommendations and time-versioned maps
This problem tests your ability to model a time-versioned key-value store and leverage graph adjacency structures to perform multi-hop relationship recommendations.
Coding & AlgorithmsOnsiteBinary SearchGraphsHash Maps - LendingClubMediumData ScientistDetermine If Two Numbers Sum to Target
This question evaluates a candidate's basic algorithmic fluency in array processing and the ability to reason about pairwise sums using auxiliary data structures.
Coding & AlgorithmsTechnical Screen - LiftoffMediumSoftware EngineerCompute the Eddington number from ride distances
This question evaluates a candidate's competence in array manipulation, ordering/selection techniques, counting thresholds, and algorithmic complexity analysis required to compute the Eddington number.
Coding & AlgorithmsOnsite - LiftoffMediumSoftware EngineerFind degrees of connection in a LinkedIn graph
This question evaluates understanding of graph traversal, reachability and shortest-path concepts along with the ability to manage performance constraints on large sparse graphs.
Coding & AlgorithmsOnsite - LiftoffMediumSoftware EngineerImplement minimal RLE encode/decode with max run K
This question evaluates proficiency in string parsing and compression techniques, specifically run-length encoding/decoding, pattern detection, and algorithmic optimization for producing minimal-length encodings under a maximum pattern length constraint.
Coding & AlgorithmsTechnical Screen - LiftoffMediumSoftware EngineerParse and expand an IPv6 address
This question evaluates proficiency in IPv6 address parsing, string validation, and canonicalization, testing understanding of hexadecimal hextets and the zero-compression (::) rule within the Coding & Algorithms domain.
Coding & AlgorithmsOnsite - LimeEasySoftware EngineerCombine Overlapping Closed Intervals Into a Sorted Disjoint List
Given an unordered list of closed integer intervals, possibly with duplicates, nested intervals and touching endpoints, combine every chain of overlapping intervals and return the disjoint result ordered by start. It tests interval reasoning, precise overlap rules at shared endpoints, and careful handling of edge cases.
Coding & AlgorithmsTechnical Screen - LinkedInEasySoftware EngineerAnswer Repeated Shortest Word Distance Queries
Design a data structure that preprocesses a list of words to efficiently answer repeated queries for the shortest index distance between two distinct words.
Coding & AlgorithmsTechnical Screenhash-tabletwo-pointersdesign - LinkedInEasySoftware EngineerArrange Nonnegative Integers to Form the Largest Number
Tests custom sorting logic and string manipulation to arrange a list of nonnegative integers into the lexicographically largest combined numerical string.
Coding & AlgorithmsTechnical Screensortinggreedystring - LinkedInMediumSoftware EngineerCan You Place N Objects?
This problem tests your ability to handle greedy array traversal while maintaining specific adjacency constraints, requiring careful management of boundary indices.
Coding & AlgorithmsTechnical ScreenArraysGreedySimulation
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