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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 2071–2100 of 3640 results
- MetaHardSoftware EngineerExplain the Project You Are Most Proud Of
This question tests your ability to articulate a complex technical contribution, demonstrate ownership through adversity, and communicate impact clearly to a non-expert interviewer.
Behavioral & LeadershipOnsiteBehavioralLeadershipOwnership - MetaEasyData ScientistExplain why IG Story usage exceeds Facebook
This interview question evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistical checks, and recommendations in a realistic interview setting. A strong answer for Explain why IG Story usage exceeds Facebook states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Analytics & ExperimentationOnsite - MetaMediumSoftware EngineerExplain your main growth area
This question evaluates a candidate's self-awareness, growth mindset, and ability to identify and develop specific professional skills or behaviors relevant to leadership, collaboration, and technical role effectiveness.
Behavioral & LeadershipOnsite - MetaMediumSoftware EngineerExtend BFS maze solver with keys and arrows
This problem tests your ability to adapt Breadth-First Search (BFS) to a state-space where the current location is augmented by a collection of keys, effectively transforming the grid into a larger, multi-layered graph.
Coding & AlgorithmsOnsiteBFSGraphsBitmask - MetaMediumData ScientistFake Accounts [AE]
This question tests your ability to apply Bayes' Theorem in a low-prevalence classification scenario and your ability to engineer robust signals for detecting anomalous user behavior.
Statistics & MathOnsiteBayes TheoremClassificationPrecision-Recall - MetaHardMachine Learning EngineerFind A Low-Quality Annotator From Label Data
This problem tests your ability to clean noisy labeling datasets and design metrics to detect annotator bias or performance degradation.
Data Manipulation (SQL/Python)OnsitePandasData CleaningMetrics - MetaMediumSoftware EngineerFind All Binary Tree Nodes Exactly K Edges from a Target Node
A binary tree coding problem: given a tree with distinct values, a target node and a distance k, return every node exactly k edges away, including nodes reached by moving up through ancestors. It tests traversal in both directions of a tree, level-order input parsing and careful handling of visited nodes.
Coding & AlgorithmsOnsite - MetaMediumSoftware EngineerFind Any Local Minimum with Iterative Binary Search
Find the index of any strict local minimum in a nonempty array whose adjacent values differ, using an iterative logarithmic-time algorithm. The task tests search invariants, boundary-as-infinity semantics, singleton and monotone arrays, and correctness when several indices are valid.
Coding & AlgorithmsOnsite - MetaHardMachine Learning EngineerFind Maximum Unique-Character Subset
This problem tests your ability to use bitmasking and backtracking with pruning to solve a variation of the maximum set packing problem under character constraints.
Coding & AlgorithmsOnsiteBitmaskingBacktrackingRecursion - MetaHardSoftware EngineerFind Nearby High Scores in a Large Game Leaderboard
Design a high-scale gaming leaderboard service capable of real-time score updates, deterministic tie-breaking, friend-filtered leaderboards, and efficient "nearby competitor" queries under extreme write loads.
System DesignOnsiteDistributed SystemsIn-Memory CachingLeaderboard - MetaHardMachine Learning EngineerFind Words Containing Other Words
This problem tests your ability to efficiently identify all words in a list that contain at least one other word from the same list as a substring, utilizing optimized string processing or data structures like Tries.
Coding & AlgorithmsOnsiteStringsTrieOptimization - MetaMediumSoftware EngineerFind a Local Minimum with Left-Biased Binary Search
This problem tests the ability to adapt binary search to identify a local minimum in an unsorted array, focusing on handling boundary conditions and non-strict inequality logic.
Coding & AlgorithmsOnsiteBinary SearchArraysDivide and Conquer - MetaMediumSoftware EngineerFind integer in most intervals
This question evaluates a candidate's ability to reason about interval overlap counting, manage range endpoints efficiently, and balance time-space trade-offs when identifying points that maximize coverage.
Coding & AlgorithmsOnsite - MetaMediumSoftware EngineerFind kth largest element in array
A classic Meta software engineer onsite coding question: return the k-th largest element from an unsorted integer array, handling duplicates correctly. It tests order statistics and selection algorithms — sort, size-k min-heap (O(n log k)), and quickselect (O(n) average) — and the candidate's ability to beat a full sort.
Coding & AlgorithmsOnsite - MetaMediumMachine Learning EngineerFind kth smallest in sorted matrix
This question evaluates algorithmic problem-solving and data-structure knowledge, focusing on selection in a row-and-column-sorted matrix and the comparative use of min-heaps versus value-space binary search along with time/space complexity and edge-case analysis.
Coding & AlgorithmsOnsite - MetaMediumData ScientistFind least active countries
This question tests the ability to perform multi-step data aggregation using SQL, specifically focusing on joining, filtering by date ranges, calculating distinct counts, and identifying bottom-tier performers across different time periods.
Data Manipulation (SQL/Python)OnsiteSQLAggregationJoins - MetaMediumMachine Learning EngineerFind longest palindromic substring
This problem tests your ability to optimize string processing algorithms, specifically moving from a brute-force approach to an efficient expansion-based technique for identifying palindromic patterns.
Coding & AlgorithmsOnsiteStringsDynamic ProgrammingTwo Pointers - MetaMediumSoftware EngineerFind missing ranges in interval
This question evaluates a candidate's proficiency in array traversal, interval reasoning, handling edge cases including empty inputs and 32-bit integer boundary conditions, and enforcing time and space complexity constraints.
Coding & AlgorithmsOnsite - MetaMediumSoftware EngineerFind shortest subarray with range ≥ k
This question evaluates proficiency with array algorithms and range-query reasoning, testing understanding of max/min behavior over contiguous subarrays and use of appropriate data-structure techniques; it belongs to the Coding & Algorithms domain.
Coding & AlgorithmsOnsite - MetaMediumSoftware EngineerFind shortest substring with N unique characters
This question evaluates proficiency in string processing, handling character-uniqueness constraints, and algorithmic thinking about time and space efficiency.
Coding & AlgorithmsOnsite - MetaMediumMachine Learning EngineerFind target using robot movement API
This question evaluates a candidate's ability to design exploration and state-space search strategies for a robot operating in an unknown, partially blocked 2D grid using a constrained movement and sensing API, testing competency in traversal algorithms, state management, and handling limited observability.
Coding & AlgorithmsOnsite - MetaMediumSoftware EngineerFind the Unique Pair of Array Indices Whose Values Sum to a Target
Given an integer array and a target, return the indices of the only pair of different elements whose values add up to the target, smaller index first. Arrays hold up to 10,000 values of up to one billion in magnitude, and the task is a common warm-up that tests clean, efficient array reasoning.
Coding & AlgorithmsOnsite - MetaMediumData ScientistFind the most-used app
This question evaluates data manipulation and metrics-definition skills, emphasizing SQL and Python proficiency for aggregating user activity and joining app metadata within analytics workflows.
Data Manipulation (SQL/Python)Onsite - MetaMediumSoftware EngineerFind top-K frequent elements in a stream
This question evaluates understanding of streaming algorithms, frequency estimation, and data-structure-based top-K selection, emphasizing space/time and accuracy trade-offs when processing large or unbounded data.
Coding & AlgorithmsOnsite - MetaMediumMachine Learning EngineerGenerate unique permutations with duplicates
This question evaluates a candidate's understanding of permutation generation and duplicate handling within algorithm design, testing combinatorial reasoning, correctness proofs, and time/space complexity analysis.
Coding & AlgorithmsOnsite - MetaHardProduct ManagerGoogle–Roomba Acquisition Strategy
Practice a Google and Roomba acquisition strategy case with smart-home fit, user value, privacy governance, competitive landscape, financial modeling, regulatory risk, integration planning, alternatives, and a clear go or no-go recommendation.
Product / Decision MakingOnsite - MetaMediumSoftware EngineerGroup Binary Tree Nodes by Vertical Column, Top to Bottom and Left to Right
Return a binary tree's node values grouped by vertical column from left to right, ordering each column top to bottom and breaking ties within a row by left-to-right position. The tree arrives as a level-order list, and the task tests coordinate tracking during traversal and precise tie handling.
Coding & AlgorithmsOnsite - MetaMediumSoftware EngineerHandle conflict and missed delivery deadlines
This question evaluates interpersonal competencies such as conflict resolution, relationship management, communication, ownership, and accountability in scenarios involving missed delivery deadlines and team dynamics.
Behavioral & LeadershipOnsite - MetaEasyAnalytics EngineerHandle diverse styles and give constructive feedback
This question evaluates an Analytics Engineer's competencies in collaboration, inclusive communication, conflict resolution, constructive feedback delivery, and documentation practices within the Behavioral & Leadership domain.
Behavioral & LeadershipOnsite - MetaMediumSoftware EngineerHandle feedback and priority conflicts
Handle feedback and priority conflicts 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 & LeadershipOnsite
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