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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
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- 546
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- 11
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Showing 451–480 of 2629 results
- BitkernelHardSoftware EngineerImplement popup and redirect in JavaScript
This question evaluates proficiency with client-side JavaScript, including browser APIs, DOM-based UI creation for popups, event handling, navigation mechanisms, and simple input validation for redirects.
Coding & AlgorithmsOnline Assessment - BlackRockEasySoftware EngineerDesign paint editor with undo/redo
This question evaluates a candidate's ability to implement mutable state management, efficient data structures and algorithms for pixel operations (draw, erase, flood fill) alongside correct undo/redo history tracking and state consistency.
Coding & AlgorithmsTechnical Screen - BlackRockMediumSoftware EngineerImplement sorting and set intersection with input parsing
This question evaluates proficiency in algorithm design and implementation, specifically sorting algorithms, set intersection logic, input parsing, and analysis of time/space complexity and algorithm stability within the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - BlackRockMediumSoftware EngineerSolve hierarchy distance and digit-square convergence
This question evaluates understanding of tree and graph modeling, shortest-path reasoning, iterative function behavior and cycle detection, along with time and space complexity analysis within the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - BloombergMediumSoftware EngineerAdd Two Forward-Order Lists
This problem tests your ability to perform manual addition on numbers represented by linked lists where the most significant digit comes first, requiring either stack-based reversal or recursive backtracking.
Coding & AlgorithmsTechnical ScreenLinked ListMathStack - BloombergMediumSoftware EngineerCheck equal character frequencies
This problem tests your ability to use frequency mapping to determine if a string can be transformed into a state where all characters appear the same number of times through a single character removal.
Coding & AlgorithmsTechnical ScreenStringHash MapFrequency Analysis - BloombergEasySoftware EngineerCompute meeting rooms and evaluate RPN
This problem tests interval management using sorting and heap-like logic for resource allocation, combined with stack manipulation to evaluate mathematical expressions.
Coding & AlgorithmsTechnical ScreenSortingHeapStack - BloombergMediumSoftware EngineerCount friend requests based on age rules
This question evaluates algorithmic problem-solving skills involving array processing, counting and combinatorics under conditional constraints and frequency handling.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerCount islands by requested sizes
This problem tests your ability to use graph traversal (DFS/BFS) to identify connected components in a grid and efficiently query their sizes using frequency maps.
Coding & AlgorithmsTechnical ScreenGraphsDFSGrid - BloombergHardSoftware EngineerDesign a data structure for dynamic top‑K frequency
This question evaluates data structure and algorithm design skills, focusing on frequency counting, dynamic maintenance of top-K elements, and efficient update and query operations in a multiset within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerDesign variable-size LRU cache
This question evaluates understanding of cache design and eviction policies (LRU), management of variable-sized entries and memory budgeting, and the implementation of efficient data structures that support amortized O(1) access, updates and correct capacity accounting.
Coding & AlgorithmsTechnical Screen - BloombergHardSoftware EngineerDetect Recent Duplicate Records with Bounded Memory
Design a memory-bounded streaming duplicate detector that identifies repeated news/document records within a sliding time window and evicts expired content to prevent memory leaks.
Coding & AlgorithmsTechnical ScreenSliding WindowHash TableQueue - BloombergMediumSoftware EngineerDetermine Balloon Popping Time
This problem tests your ability to model a grid-based propagation process as a shortest-path problem on a weighted graph, requiring an understanding of Dijkstra's algorithm or Breadth-First Search variants.
Coding & AlgorithmsTechnical ScreenGraphBFSShortest Path - BloombergMediumSoftware EngineerFind maximum cable length by cutting
This question evaluates a candidate's proficiency in algorithm design, particularly applying binary search over a monotonic answer space and managing integer versus floating-point precision when maximizing piece length.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerFind the Lowest Common Ancestor of Two Nodes in an N-ary Tree
Given a rooted tree whose nodes can have any number of children, stored as child lists, return the lowest common ancestor of two labeled nodes. The problem generalizes the binary-tree version to arbitrary fan-out and tests tree traversal, ancestor reasoning, and robust handling of very deep, path-shaped trees.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerFlag Fraudulent Transactions by Amount and Travel Time
This problem tests your ability to use hash maps for efficient lookups and filtering collections based on conditional business logic.
Coding & AlgorithmsTechnical ScreenHash MapsAlgorithmsData Structures - BloombergMediumSoftware EngineerGenerate all strings by expanding wildcards
This question evaluates algorithmic string manipulation and combinatorial enumeration skills, focusing on handling wildcard characters and generating all possible binary outcomes from a pattern.
Coding & AlgorithmsOnsite - BloombergEasySoftware EngineerGenerate the Collatz Sequence From a Positive Integer Down to 1
Write a function that runs the Collatz process from a positive integer, halving even values and replacing odd values with three times the value plus one, and returns every number visited until reaching 1. It tests loop termination, edge cases such as a start of 1, and intermediate values beyond 32-bit range.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerImplement a simplified grep with extensible flags
This question evaluates competency in designing maintainable, extensible text-processing code, covering flag parsing, separation of concerns, and correct substring matching behavior.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerImplement classes in existing abstract hierarchy
This question evaluates object-oriented design and implementation skills in Python within the Coding & Algorithms and software engineering domain, focusing on completing concrete subclasses in an existing abstract class hierarchy while preserving public interfaces and type compatibility.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerImplement island counting with BFS and DFS
A Bloomberg Software Engineer onsite coding question: count the number of islands (connected land regions) in an m x n grid under four-directional connectivity. It asks for a linear-time O(m·n) flood-fill plus a second, explicit breadth-first-search implementation, with correctness and complexity analysis, edge-case handling, tests, and a diagonal-adjacency follow-up.
Coding & AlgorithmsOnsite - BloombergMediumSoftware EngineerImplement sliding-window timestamped average
This question evaluates understanding of time-based sliding-window data structures, streaming aggregation, and the handling of timestamped records with efficient incremental updates and evictions.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerImplement streaming enrichment aggregator
This problem tests your ability to design a stateful stream processor that aggregates fragmented event data based on a shared correlation ID within a sliding time window.
Coding & AlgorithmsTechnical ScreenHashMapsStream ProcessingConcurrency - BloombergMediumSoftware EngineerMinimize Travel Assignment Cost
This problem tests your ability to minimize costs when assigning workers to multiple destinations, requiring an application of dynamic programming to manage fixed capacity constraints.
Coding & AlgorithmsTechnical ScreenDynamic ProgrammingBitmaskingOptimization - BloombergMediumSoftware EngineerMinimum Character Replacements to Make One String an Anagram of Another
Given two strings of equal length made of lowercase letters, find the fewest single-character replacements in the second string that turn it into an anagram of the first. This phone-screen coding problem tests character frequency counting and precise reasoning about which letters must change.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerPredict most likely next word from training data
This problem tests your ability to process textual data into an N-gram model, requiring efficient counting of sequence frequencies to predict the most probable subsequent word.
Coding & AlgorithmsOnsiteHash MapsNLPData Structures - BloombergMediumSoftware EngineerSolve Grid Path and Unique Substring
This problem tests grid traversal via dynamic programming or recursion, combined with the sliding window technique to identify unique character patterns within string segments.
Coding & AlgorithmsOnline AssessmentDynamic ProgrammingSliding WindowGrid - BloombergMediumSoftware EngineerSolve Magic Dictionary and unknown traversal
This interview question evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer for Solve Magic Dictionary and unknown traversal states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsTechnical Screen - BloombergMediumSoftware EngineerSolve Number of Islands
This question evaluates understanding of graph and grid traversal concepts, specifically identifying connected components in a binary matrix and familiarity with traversal strategies such as BFS and DFS.
Coding & AlgorithmsOnsite - BloombergMediumSoftware EngineerSolve common string/tree/grid interview tasks
This problem tests your ability to perform a vertical-order traversal of a binary tree by mapping nodes to relative column indices and sorting them by their depth and value.
Coding & AlgorithmsTechnical ScreenTreesBFSSorting
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