practice a little every day, paws crossed ♡
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 571–600 of 781 results
- QuinceMediumSoftware EngineerCheck Whether a Word Repeated K Times Is a Subsequence
This problem tests the ability to optimize string pattern matching by using modular arithmetic and pointer manipulation to avoid unnecessary memory allocation.
Coding & AlgorithmsOnline AssessmentStringsTwo PointersGreedy - QuinceMediumSoftware EngineerOpen the Minimum Number of Sprinklers to Cover a Garden
This problem tests greedy algorithm design and interval scheduling techniques to solve a coverage optimization task.
Coding & AlgorithmsOnline AssessmentGreedyIntervalsSorting - RampMediumFrontend EngineerBuild a React Word-Guessing Game with Green, Yellow, and Red Letter Feedback
A front-end exercise to build a small React word-guessing game in JavaScript or TypeScript, where each submitted guess appears as a row of letter cells colored green, yellow, or red against a target word. It tests component state design, input validation, and a clearly specified letter-scoring rule, including repeated letters.
Software Engineering FundamentalsOnline Assessment - RampEasyFrontend EngineerBuild a Wordle Guess Checker with Green, Yellow and Red Letter Feedback
Build a small Wordle-style component that accepts a guess of up to five letters and colors each letter green, yellow or red against a fixed secret word, tested with SPEND. Tests input handling, pure scoring logic, repeated-letter rules and simple UI state under a 45-minute limit.
Software Engineering FundamentalsOnline Assessment - RampMediumFrontend EngineerBuild a Wordle-Style Game in React
Implement a 5-letter, 5-guess Wordle-style game in React featuring correct duplicate-letter evaluation, virtual and physical keyboard support, and proper game-state transitions.
Software Engineering FundamentalsOnline Assessmentreactfrontendstate-management - RampMediumSoftware EngineerDesign a banking system with payments and merging
This question tests your ability to design a robust, distributed financial ledger system that handles high-throughput transactions, ensures strict consistency, and supports the complex operation of merging two distinct user accounts.
System DesignOnline AssessmentDistributed SystemsDatabasesFintech - RampHardSoftware EngineerDesign an in-memory cloud storage system
This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Design an in-memory cloud storage system states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnline Assessment - RampMediumSoftware EngineerFrom Take-Home Script to Production: Python Trade-offs and Hardening a Data Job
This question evaluates a candidate's engineering judgment about Python's language trade-offs and the steps needed to harden a working script for production use. It tests understanding of dynamic typing, concurrency limits, and correct handling of monetary data, commonly asked to assess practical software-engineering maturity beyond algorithmic correctness.
Software Engineering FundamentalsOnline Assessment - RampMediumSoftware EngineerImplement a React flag loader with typewriter effect
This question evaluates front-end engineering skills including React and TypeScript component design, DOM inspection and extraction, HTTP fetching and parsing, asynchronous timing for typewriter animations, resource cleanup, and testability with Mocha; domain: Software Engineering Fundamentals; level: practical application.
Software Engineering FundamentalsOnline Assessment - RampMediumSoftware EngineerImplement a multi-level digital recipe manager
Tests skills in data modeling and stateful class implementation, covering CRUD operations, case-insensitive string handling, recipe ID generation, list management, search and sort logic, and basic user/edit permissions.
Coding & AlgorithmsOnline Assessment - RampMediumSoftware EngineerImplement multi-level task manager APIs
This question evaluates implementation skills for stateful in-memory data structures, API evolution handling, substring search and prioritized sorting, and time-windowed assignment logic with quota enforcement in the Coding & Algorithms domain, and is primarily a practical application problem rather than a purely conceptual one.
Coding & AlgorithmsOnline Assessment - RampMediumSoftware EngineerMaximize Earnings by Converting Days Off into Workdays
This question evaluates a candidate's skill in dynamic programming and constrained optimization, specifically deciding which state transitions to modify under a limited budget of changes. It falls under coding and algorithms interviews, testing practical application of greedy or DP reasoning over sequential data with adjacency-based bonuses rather than pure conceptual knowledge.
Coding & AlgorithmsOnline Assessment - RampMediumSoftware EngineerMaximum Profit from Dated Stock Trade Records
This question evaluates a candidate's ability to design an efficient single-pass algorithm for grouped time-series data, tracking per-symbol running minimums to compute maximum achievable profit. It tests array processing, hash-map grouping, and edge-case handling for unsorted records, commonly used in coding interviews to assess practical algorithmic problem-solving rather than pure theory.
Coding & AlgorithmsOnline Assessment - RampMediumSoftware EngineerMaximum Profit from Multi-Stock Trading Records
This question evaluates a candidate's ability to parse and sort unstructured event data, then apply a greedy or dynamic-programming strategy for maximizing profit across multiple independent series. It falls under coding and algorithms, commonly used to assess array processing, state tracking, and stock-trading pattern recognition at a practical implementation level.
Coding & AlgorithmsOnline Assessment - RampMediumSoftware EngineerMulti-Level Warehouse Storage with Weighted Retrieval
This question evaluates a candidate's ability to design an object-oriented data structure with multiple prioritized eviction and expiration rules. It tests skills in coding and algorithms, specifically simulating TTL-based expiry alongside tiered, capacity-aware selection logic. Such multi-rule state machine problems are common in interviews to assess careful requirement tracking and practical implementation of layered constraints.
Coding & AlgorithmsOnline Assessment - RampMediumSoftware EngineerPer-IP Sliding-Window Rate Limiter: Accept or Reject Each Request
Implement a per-IP sliding-window rate limiter: given request timestamps, IP addresses, a request limit and a window length, decide in order whether each request is accepted or rejected. Tests exact window-boundary semantics, per-IP state, and processing a request log efficiently.
Coding & AlgorithmsOnline Assessment - ReevoMediumSoftware EngineerCheck strings against dictionary efficiently
This question evaluates skills in efficient membership testing for large datasets, memory-time trade-offs in data structures, and string handling concerns such as case sensitivity and Unicode normalization.
Coding & AlgorithmsOnline Assessment - ReevoMediumSoftware EngineerCount all palindromic substrings
This question evaluates proficiency with string algorithms and algorithmic problem-solving, focusing on palindrome detection and counting contiguous substrings. It is commonly asked to assess implementation skills and the ability to reason about time and space complexity within the Coding & Algorithms domain, emphasizing practical application rather than purely conceptual understanding.
Coding & AlgorithmsOnline Assessment - ReevoMediumSoftware EngineerFetch and aggregate paginated team data via API
This question evaluates API integration, pagination handling, robust error handling (retries/backoff and rate-limit awareness), data aggregation, sorting and top‑N selection skills within the Data Manipulation (SQL/Python) domain.
Data Manipulation (SQL/Python)Online Assessment - Reinforce LabsMediumSoftware EngineerCompute minimum added stones to balance a tree
This problem tests tree traversal techniques and greedy aggregation, requiring you to determine the minimum number of 'stones' needed to equalize all subtree sums to match a target value.
Coding & AlgorithmsOnline AssessmentTreesGreedyRecursion - Reinforce LabsMediumSoftware EngineerWrite SQL to compute current product stock
This problem tests the ability to calculate current stock levels by aggregating historical transaction events against an initial inventory baseline using SQL joins and window functions.
Software Engineering FundamentalsOnline AssessmentSQLAggregationsJoins - Resolve.AiMediumSoftware EngineerDesign a Weighted Log Distributor
This question tests your ability to design a distributed system that routes incoming log streams to multiple storage clusters based on specified weight configurations while ensuring high availability and fault tolerance.
System DesignOnline AssessmentLoad BalancingDistributed SystemsData Pipelines - RipplingMediumSoftware EngineerFind bounding boxes of connected houses
This problem tests your ability to perform graph traversal (BFS/DFS) on a 2D grid to identify distinct connected components and compute their spatial extent.
Coding & AlgorithmsOnline AssessmentGraphsDFSBFS - Ro.CoMediumMachine Learning EngineerDebug an inaccurate patient-message triage classifier service and write up fixes
A one-hour take-home for a senior applied AI engineering role: debug a telehealth service that sorts patient messages into care categories with an urgency and a confidence score, decide when to call an LLM or send a message to manual review, and write up bugs, priorities and trade-offs. It tests debugging, safety judgment and ML evaluation.
Machine LearningOnline Assessment - RobloxHardData ScientistApply Bayes' rule to compute posterior
Evaluates understanding of Bayes’ rule and basic probability concepts—specifically computing a posterior probability P(A|B) and the marginal likelihood P(B) from a prior and likelihoods—in the Statistics & Math domain at a foundational-to-intermediate abstraction level.
Statistics & MathOnline Assessment - RobloxMediumData ScientistChoose best/worst actions under OA pressure
This question evaluates judgment and leadership competencies in data science — including risk assessment, stakeholder impact analysis, integrity under time pressure, and handling failing tests and collaborator input — and falls under the Behavioral & Leadership category.
Behavioral & LeadershipOnline Assessment - RobloxEasyData ScientistCompute A/B test sample size and Bayes posterior
This question tests the ability to calculate required sample size for a frequentist A/B test using power analysis and to perform a Bayesian update for a Bernoulli process.
Statistics & MathOnline AssessmentStatisticsA/B TestingBayesian Inference - RobloxHardData ScientistCompute DID estimate and pretrend flag
This Analytics & Experimentation question evaluates basic causal-inference and data-manipulation skills by requiring computation of a difference-in-differences (DID) estimate and a binary pretrend flag from panel-like arrays, at an implementation-level focused on summary statistics and edge-case handling.
Analytics & ExperimentationOnline Assessment - RobloxEasyData ScientistCompute diff-in-diff and pretrend flag
This question tests the ability to calculate a difference-in-differences (DiD) estimator for causal inference and implement a basic statistical test for pre-intervention trend divergence.
Analytics & ExperimentationOnline AssessmentCausal InferenceData WranglingStatistics - RobloxHardData ScientistCompute minimum sample size for A/B test
Evaluates the ability to perform sample size and power calculations for a two-sample z-test—including estimating outcome standard deviation from historical continuous data—and is categorized under Analytics & Experimentation for a Data Scientist role at an implementation-level applied statistics abstraction.
Analytics & ExperimentationOnline Assessment
Ramp
Rippling
Roblox