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Explore questions associated with Anduril. Review the source details, then use the workspace for code, notes, and diagrams.
43 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · System design
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Showing 26–43
Design a system that ingests high-frequency drone test data (sensor readings at 1-20Hz, video) and enables other teams to query and analyze the collected data.
Companies: Anduril, Qualtrics, Snowflake, Waymo
Last reported May 2025
Check whether a binary tree is height-balanced, i.e., for every node the heights of its left and right subtrees differ by at most one. With…
Companies: Anduril
Binary Tree · Depth-First Search · Tree
Return the node values of a binary tree in inorder (left → root → right) sequence. The recursive solution is trivial; the follow-up asks for…
Companies: Anduril, Meta, Oracle
Binary Tree · Depth-First Search · Stack · Tree
Given a string with brace-enclosed comma-separated option groups and implicit concatenation (e.g., "{a,b}c{d,e}"), generate all unique strings formed by choosing one option…
Companies: Anduril
Backtracking · Breadth-First Search · Sorting · Stack
Given an array of building heights, return the indices of buildings that have an unobstructed view to the ocean on the right (i.e., no building…
Companies: Anduril, Meta
Array · Monotonic Stack · Stack
Given courses as nodes and prerequisite pairs as directed edges, determine whether the directed graph is acyclic — return true if a topological ordering exists…
Companies: Anduril, Amazon, Cloudflare, DoorDash +6
Breadth-First Search · Depth-First Search · Directed Acyclic Graph · Graph Theory
Given numCourses and prerequisite pairs, return any ordering of courses that satisfies all prerequisites or an empty array if impossible — this is essentially computing…
Companies: Anduril, Amazon, Apple, Citadel +11
Breadth-First Search · Depth-First Search · Graph Theory · Topological Sort
For each day in an array of daily temperatures, determine how many days you must wait until a warmer temperature appears (or 0 if none)…
Companies: Anduril, Chime, Goldman Sachs
Array · Monotonic Stack · Stack
Given positions of houses and heaters on a line, find the minimum uniform radius R such that every house is within distance R of some…
Companies: Anduril
Array · Binary Search · Sorting · Two Pointers
Given a BST root and a value not already present, insert the value as a new leaf in the correct position to preserve BST ordering…
Companies: Anduril, LinkedIn
Binary Search Tree · Binary Tree · Tree
Convert each point to its polar angle around your location (counting points at the exact location separately), sort these angles and handle the circular wrap…
Companies: Anduril
Array · Geometry · Math · Sliding Window
Given a directed acyclic graph, find the smallest set of starting vertices from which every node is reachable. In a DAG this is uniquely achieved…
Companies: Anduril
Directed Acyclic Graph · Graph Theory
Given a binary grid, count how many distinct island shapes (connected components of 1s via 4-directional adjacency) appear, treating two islands as identical if they…
Companies: Anduril, Oracle, TikTok
Array · Breadth-First Search · Depth-First Search · Hash Function
Count the number of islands (4-directionally connected components of '1's) in an m×n binary grid. This is a connected-components/flood-fill problem typically solved with…
Companies: Anduril, Amazon, Apple, ByteDance +16
Array · Breadth-First Search · Depth-First Search · Matrix
Given a line of dominoes where some are initially pushed left (L), right (R), or upright (.), compute the final positions after simultaneous propagation of…
Companies: Anduril
Dynamic Programming · String · Two Pointers
Given a set of 2D integer points and multiple circular queries, compute for each circle how many points lie inside or on it; the main…
Companies: Anduril
Array · Geometry · Math
Determine whether ransomNote can be formed from magazine by verifying that for every character, magazine contains at least as many occurrences as needed — i.e.…
Companies: Anduril, Pinterest
Counting · Hash Table · String
Given an n×n binary grid where 0s are open and 1s are blocked, return the length (number of cells) of the shortest 8-directionally connected path…
Companies: Anduril, Amazon, Meta
Array · Breadth-First Search · Matrix