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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.
- 9403
- Questions
- 546
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- 11
- Topics
- 8
- Languages
Showing 2371–2400 of 2629 results
- UberHardSoftware EngineerCount Islands of Connected Land Cells in a Binary Grid
A classic grid coding problem asking you to count the islands formed by horizontally or vertically connected land cells in a binary grid. It tests grid traversal, connected-component counting, and careful handling of grid boundaries and already visited cells.
Coding & AlgorithmsOnsite - UberHardSoftware EngineerCount Palindromic Ancestor Paths
This problem tests your ability to use bit manipulation and prefix properties on trees to solve path-related queries efficiently, specifically focusing on the property that a set of characters can form a palindrome if at most one character has an odd frequency.
Coding & AlgorithmsOnline AssessmentBit ManipulationTreesDFS - UberMediumSoftware EngineerCount Valid Infection Orders
This problem tests your ability to use combinatorial counting and dynamic programming to determine the number of valid sequences in which a population can be infected under specific adjacency constraints.
Coding & AlgorithmsOnsiteDynamic ProgrammingCombinatoricsAlgorithms - UberMediumSoftware EngineerCount paths with prime-ending jumps
This question evaluates a candidate's ability to design and implement dynamic programming for counting paths, combining combinatorial reasoning with modular arithmetic and handling step-size constraints tied to primes ending in digit 3.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerCount subarrays with at least k fruit pairs
This question evaluates algorithmic problem-solving focused on frequency-based counting and efficient enumeration of subarrays, testing competence in designing subquadratic solutions and selecting appropriate data representations within the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerCount subarrays with ≥k identical pairs
This question evaluates proficiency in array algorithms, frequency-based counting and combinatorial reasoning for identifying equal-element pairs within contiguous subarrays.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerDeep Equality of Two Records
This problem tests your ability to recursively compare two complex, nested data structures while handling different types like dictionaries, lists, and primitives.
Coding & AlgorithmsTechnical ScreenRecursionData StructuresHash Maps - UberMediumSoftware EngineerDesign top-K frequency structure
This question evaluates ability to design efficient in-memory data structures for frequency tracking, including handling recency-based tie-breaking, memory bounds under churn, and concurrency implications.
Coding & AlgorithmsOnsite - UberMediumSoftware EngineerDesign top-K tracker with linked lists
Design top-K tracker with linked lists 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 & AlgorithmsOnsite - UberHardSoftware EngineerDetermine Whether a Word Exists in a Character Grid
Practice a Uber coding interview problem focused on determine whether a word exists in a character grid. The prompt emphasizes edge cases, clean implementation, and verifiable test behavior without revealing the solution.
Coding & AlgorithmsTechnical Screen - UberMediumSoftware EngineerDetermine balanced k values in a permutation
This question evaluates algorithmic reasoning about permutations and contiguous subarray properties, testing skills in array manipulation, positional reasoning, combinatorial insight, and complexity-aware algorithm design within the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerEvaluate an Arithmetic Expression
This problem tests your ability to parse and evaluate mathematical expressions involving integers, addition, subtraction, multiplication, division, and parentheses using stacks or recursion.
Coding & AlgorithmsOnsiteStackParsingString Manipulation - UberMediumSoftware EngineerFind Any Available Meeting Room
This question evaluates a candidate's competence in handling interval-based scheduling problems, specifically managing interval data and performing efficient searches within sorted bookings to detect potential overlaps.
Coding & AlgorithmsOnsite - UberEasySoftware EngineerFind Earliest Column With One
This question tests the ability to optimize searches in a sorted binary matrix by minimizing expensive API calls through efficient traversal techniques.
Coding & AlgorithmsTechnical ScreenBinary SearchOptimizationMatrix - UberMediumSoftware EngineerFind Earliest Full Connectivity Timestamp
This question evaluates understanding of graph connectivity and temporal event processing, examining how pairwise interactions over time can merge components into a single connected set.
Coding & AlgorithmsTechnical Screen - UberMediumSoftware EngineerFind Kth Smallest in BST
This question evaluates understanding of binary search tree properties, ordered data retrieval, and algorithmic efficiency in locating the k-th smallest element.
Coding & AlgorithmsTechnical Screen - UberMediumSoftware EngineerFind a Bounded Subarray and Largest Square
This question evaluates array manipulation and algorithmic problem-solving skills across two tasks: enforcing bounded value ranges within contiguous subarrays and identifying largest uniform square regions in binary matrices, exercising concepts such as range-tracking, efficient data structures, and dynamic programming.
Coding & AlgorithmsOnsite - UberMediumSoftware EngineerFind a Lexicographically Optimal Robot Path with Charging Cells
Find a path in a grid from start to target that lexicographically minimizes charging stations used, peak battery segment length, total moves, and breaks ties by flattened cell indices.
Coding & AlgorithmsTechnical ScreenGraphBFSShortest Path - UberMediumSoftware EngineerFind all dictionary words in a grid
This problem tests your ability to navigate a 2D grid using backtracking and optimize dictionary lookups using a Trie data structure.
Coding & AlgorithmsTechnical ScreenDFSBacktrackingTrie - UberHardSoftware EngineerFind cheapest flight with at most K stops
This question evaluates graph algorithm proficiency and problem-modeling skills, specifically working with directed weighted graphs to optimize path cost under a constraint on intermediate stops.
Coding & AlgorithmsTechnical Screen - UberMediumSoftware EngineerFind earliest common meeting slot
This problem tests interval management and the ability to find a common free window across multiple disjoint sets of busy times while respecting daily working constraints.
Coding & AlgorithmsOnsiteIntervalsSortingGreedy - UberHardSoftware EngineerFind earliest time all riders become connected
Assesses understanding of graph connectivity, temporal event processing, and dynamic graph data-structures for determining when a set of nodes becomes a single connected component.
Coding & AlgorithmsOnsite - UberMediumSoftware EngineerFind leftmost point of maximum brightness
This question evaluates understanding of interval overlap counting, efficient use of ordered data structures for range events, tie-breaking logic, and robustness to numeric edge cases such as large coordinates and floating-point radii.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerFind minimum activations to absorb all balls
This question evaluates the ability to model Euclidean-distance relations as a static connectivity graph and reason about the minimum number of activations needed to absorb all nodes, testing computational geometry and graph algorithms competency.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerFind minimum reversals to orient edges away from root
This question evaluates understanding of directed graphs and rooted trees, the ability to reason about edge orientations and minimal reversals, and competency in traversal techniques and complexity analysis.
Coding & AlgorithmsOnline Assessment - UberMediumSoftware EngineerFind next and closest palindromes
This question evaluates string-based numeric manipulation and palindrome construction, including edge-case handling (all 9s, single-digit inputs, length changes), candidate generation and magnitude comparison of large numbers as strings, and carry propagation for fixed-length decimal palindromes.
Coding & AlgorithmsOnline Assessment - UberHardSoftware EngineerFind robots matching obstacle-distance signature
This problem tests spatial reasoning, multi-source Breadth-First Search (BFS) for distance mapping, and pattern matching within 2D grids.
Coding & AlgorithmsTechnical ScreenBFSDynamic ProgrammingMatrix - UberMediumSoftware EngineerFind shortest jumps in circular array
This question evaluates graph-traversal and modular arithmetic skills by requiring modeling a circular array as a state graph and determining reachability and minimum-distance jumps under wrap-around constraints.
Coding & AlgorithmsTechnical Screen - UberEasySoftware EngineerFind smallest start index avoiding left exit
This question evaluates a candidate's ability to analyze reachability and cycle behavior in array-based functional graphs, testing competency in array manipulation, traversal, loop detection, and runtime optimization within the Coding & Algorithms domain.
Coding & AlgorithmsOnsite - UberMediumSoftware EngineerFind the Best Currency Conversion Rate
Find the largest conversion factor obtainable between two currencies in a directed graph where rates multiply along each path. Handle parallel rates, unreachable targets, identical currencies, cycles, and floating-point tolerance under a finite-optimum guarantee.
Coding & AlgorithmsTechnical Screen
Uber