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Changelog

Track all the latest content additions and updates to Hello Interview. We continuously add new system design breakdowns, deep dives, and learning materials.

April 29 - May 5, 2024

1 updates

New Content

Meta's Product Architecture Interview: How to Prepare

May 1, 2024 by Evan King | Blog

April 22 - 28, 2024

1 updates

New Content

System Design Interview Patterns

Apr 25, 2024 by Evan King, Stefan Mai | Quick Guide

March 11 - 17, 2024

2 updates

New Content

System Design Key Technologies

Mar 15, 2024 by Evan King, Stefan Mai | Quick Guide

Greedy Algorithms Overview

Mar 15, 2024 by Jimmy Zhang | Content

March 4 - 10, 2024

1 updates

New Content

Mar 10, 2024 by Jimmy Zhang | Content

February 26 - March 3, 2024

1 updates

New Content

Binary Search Overview

Mar 1, 2024 by Jimmy Zhang | Content

February 19 - 25, 2024

1 updates

New Content

Linked List Overview

Feb 20, 2024 by Jimmy Zhang | Content

February 12 - 18, 2024

6 updates

New Content

Meta People Management Interviews Explained by a Former Meta Interviewer

Feb 15, 2024 by Gilad Noar | Blog

Tips for Meta EM Interviews

Feb 12, 2024 by Stefan Mai | Blog

Fixed Length Sliding Window

Feb 12, 2024 by Jimmy Zhang | Content

Variable Length Sliding Window

Feb 12, 2024 by Jimmy Zhang | Content

Fixed Length Sliding Window

Feb 12, 2024 by Jimmy Zhang | Content

Variable Length Sliding Window

Feb 12, 2024 by Jimmy Zhang | Content

February 5 - 11, 2024

5 updates

New Content

Redis Deep Dive for System Design Interviews

Feb 9, 2024 by Stefan Mai | Deep Dive

Feb 8, 2024 by Jimmy Zhang | Content

Feb 8, 2024 by Jimmy Zhang | Content

System Design in a Hurry

Feb 5, 2024 by Evan King, Stefan Mai | Quick Guide

Core Concepts for System Design Interviews

Feb 5, 2024 by Evan King, Stefan Mai | Quick Guide

January 22 - 28, 2024

3 updates

New Content

Intervals Overview

Jan 25, 2024 by Jimmy Zhang | Content

Intervals Overview

Jan 25, 2024 by Jimmy Zhang | Content

System Design Requirements Gathering

Jan 24, 2024 by Stefan Mai | Blog

January 8 - 14, 2024

1 updates

New Content

Design a Local Delivery Service like Gopuff

Jan 8, 2024 by Stefan Mai | System Design

January 1 - 7, 2024

106 updates

New Content

Data Structures and Algorithms Introduction

Jan 1, 2024 by Jimmy Zhang | Content

Depth-First Search Introduction

Jan 1, 2024 by Jimmy Zhang | Content

Breadth-First Search Introduction

Jan 1, 2024 by Jimmy Zhang | Content

Linked List Overview

Jan 1, 2024 by Jimmy Zhang | Content

Binary Search Overview

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Backtracking Overview

Jan 1, 2024 by Jimmy Zhang | Content

Greedy Algorithms Overview

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Prefix Sum Overview

Jan 1, 2024 by Jimmy Zhang | Content

Binary Trees Overview

Jan 1, 2024 by Jimmy Zhang | Content

Container With Most Water

Jan 1, 2024 by Jimmy Zhang | Content

Two Sum (Sorted Array)

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Triangle Numbers

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Trapping Rain Water

Jan 1, 2024 by Jimmy Zhang | Content

Linked List Cycle

Jan 1, 2024 by Jimmy Zhang | Content

Palindrome Linked List

Jan 1, 2024 by Jimmy Zhang | Content

Remove Nth Node From End of List

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Swap Nodes in Pairs

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Maximum Depth of Binary Tree

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Passing Values Down and Helper Functions

Jan 1, 2024 by Jimmy Zhang | Content

Validate Binary Search Tree

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Diameter of a Binary Tree

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Longest Univalue Path

Jan 1, 2024 by Jimmy Zhang | Content

Graphs Overview

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Graph Valid Tree

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Number of Islands

Jan 1, 2024 by Jimmy Zhang | Content

Surrounded Regions

Jan 1, 2024 by Jimmy Zhang | Content

Pacific Atlantic Water Flow

Jan 1, 2024 by Jimmy Zhang | Content

Prefix Sum Overview

Jan 1, 2024 by Jimmy Zhang | Content

Count Vowels in Substrings

Jan 1, 2024 by Jimmy Zhang | Content

Subarray Sum Equals K

Jan 1, 2024 by Jimmy Zhang | Content

Maximum Sum of Subarrays of Size K

Jan 1, 2024 by Jimmy Zhang | Content

Max Points You Can Obtain From Cards

Jan 1, 2024 by Jimmy Zhang | Content

Max Sum of Distinct Subarrays Length k

Jan 1, 2024 by Jimmy Zhang | Content

Longest Substring Without Repeating Characters

Jan 1, 2024 by Jimmy Zhang | Content

Longest Repeating Character Replacement

Jan 1, 2024 by Jimmy Zhang | Content

Breadth-First Search Introduction

Jan 1, 2024 by Jimmy Zhang | Content

Breadth-First Search Fundamentals

Jan 1, 2024 by Jimmy Zhang | Content

Level Order Sum

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Zigzag Level Order

Jan 1, 2024 by Jimmy Zhang | Content

Maximum Width of Binary Tree

Jan 1, 2024 by Jimmy Zhang | Content

Graphs Overview

Jan 1, 2024 by Jimmy Zhang | Content

Minimum Knight Moves

Jan 1, 2024 by Jimmy Zhang | Content

Rotting Oranges

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Backtracking Overview

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Solution Space Trees

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Generate Parentheses

Jan 1, 2024 by Jimmy Zhang | Content

Combination Sum

Jan 1, 2024 by Jimmy Zhang | Content

Can Attend Meetings

Jan 1, 2024 by Jimmy Zhang | Content

Insert Interval

Jan 1, 2024 by Jimmy Zhang | Content

Non-Overlapping Intervals

Jan 1, 2024 by Jimmy Zhang | Content

Merge Intervals

Jan 1, 2024 by Jimmy Zhang | Content

Employee Free Time

Jan 1, 2024 by Jimmy Zhang | Content

Dynamic Programming Fundamentals

Jan 1, 2024 by Jimmy Zhang | Content

Solving a Question with Dynamic Programming

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Longest Increasing Subsequence

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Maximum Profit in Job Scheduling

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Implement Trie Methods

Jan 1, 2024 by Jimmy Zhang | Content

Prefix Matching

Jan 1, 2024 by Jimmy Zhang | Content

Kth Largest Element in an Array

Jan 1, 2024 by Jimmy Zhang | Content

K Closest Points to Origin

Jan 1, 2024 by Jimmy Zhang | Content

Find K Closest Elements

Jan 1, 2024 by Jimmy Zhang | Content

Merge K Sorted Lists

Jan 1, 2024 by Jimmy Zhang | Content

Best Time to Buy and Sell Stock

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Topological Sort

Jan 1, 2024 by Jimmy Zhang | Content

Course Schedule

Jan 1, 2024 by Jimmy Zhang | Content

Course Schedule II

Jan 1, 2024 by Jimmy Zhang | Content

Valid Parentheses

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Longest Valid Parentheses

Jan 1, 2024 by Jimmy Zhang | Content

Monotonic Stack

Jan 1, 2024 by Jimmy Zhang | Content

Daily Temperatures

Jan 1, 2024 by Jimmy Zhang | Content

Largest Rectangle in Histogram

Jan 1, 2024 by Jimmy Zhang | Content

Apple Harvest (Koko Eating Bananas)

Jan 1, 2024 by Jimmy Zhang | Content

Search in Rotated Sorted Array

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Jan 1, 2024 by Jimmy Zhang | Content

Set Matrix Zeroes

Jan 1, 2024 by Jimmy Zhang | Content

November 27 - December 3, 2023

1 updates

New Content

The System Design Interview: What is Expected at Each Level

Nov 30, 2023 by Evan King | Blog

October 30 - November 5, 2023

2 updates

New Content

System Design Interview Fundamentals: Mastering Estimation

Nov 2, 2023 by Stefan Mai | Blog

Understanding Job Levels at FAANG Companies

Nov 1, 2023 by Evan King | Blog

October 16 - 22, 2023

1 updates

New Content

Story Crafting 101: Constructing Engaging Behavioral Interview Stories

Oct 16, 2023 by Evan King | Blog

October 2 - 8, 2023

1 updates

New Content

SWE Interviews at Meta Explained by Former Meta Interviewer

Oct 3, 2023 by Evan King | Blog

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We're constantly adding new content to help you ace your interviews. Check back regularly for the latest system design breakdowns, deep dives, and interview preparation materials.