Netflix Coding & Algorithms Interview Questions
Practice the exact questions companies are asking right now.
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Compute subtree sums with tree DFS
You are given an undirected tree with n nodes labeled 1..n and n-1 edges. The tree is rooted at node 1. Each node i has an integer value val[i]. Retur...
Solve sliding-window and disjoint-string-pairs tasks
Task A (Sliding Window) Given a string s, find the length of the longest contiguous substring that contains no repeated characters. - Input: a string ...
Compute minimum semesters to finish courses
You are given n courses labeled 1..n and a list of prerequisite relations prereq, where each element is a pair [a, b] meaning you must complete course...
Design playlist with add/remove/shuffle
Music Playlist Data Structure Design an in-memory Playlist data structure that supports the following operations on a set of songs: - add(songId): Add...
Return the longest contiguous subarray with all distinct values
Given an array shows of integers, return the longest contiguous subarray in which all values are distinct (no repeats within the subarray). Function s...
Dedupe titles in per-shelf viewport
You are rendering a streaming app home page. - The home page consists of shelves displayed from top to bottom. - Each shelf contains a list of titleId...
Group users by same last K watched movies
You are given a list of users' movie-watching histories. Each user’s history is an ordered list of movie IDs in the order they were watched (earliest ...
Find user pairs with overlapping last K movies
You are given the same user movie-watching histories as in the previous problem. Each user’s history is an ordered list of movie IDs from earliest to ...
Return valid task order from prerequisites
You are given N tasks labeled 0..N-1 and a list of directed dependency pairs [(a,b), ...] meaning task a must be done before task b. 1) Return one val...
Design command executor with undo
Problem Design and implement a command-execution framework that supports executing commands and undoing the most recently executed command. Requiremen...
Find longest run of identical consecutive shows
Given an array shows of integers, find the maximum length of a contiguous run where all values are equal. Function signature - Input: shows: List[int]...
Implement longest increasing subarray with one deletion
Given an array of integers nums, return the length of the longest strictly increasing contiguous subarray you can obtain by deleting at most one eleme...
Implement topological sort from string input
You receive N lines of raw text describing task dependencies, e.g., 'install A after B', 'C->A', 'B before D'. Implement a function that: ( 1) parses ...
Solve non-repeating show substring
Question LeetCode 3. Longest Substring Without Repeating Characters – variant where the elements are show names instead of numbers. https://leetcode.c...
Find longest unique show window
Given an array of show names (strings) representing a user's viewing history, return the start and end indices of a longest contiguous subarray that c...
Implement weighted-eviction cache
Question Design and implement a weighted cache supporting get(key) and put(key, value, weight) operations. The cache has a total weight limit; when in...
Identify Longest Consecutive Incrementing Watch-Time Sequence
Scenario A streaming platform records daily minutes watched per user and wants to identify engagement streaks. Question Given an unsorted integer arra...