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LeetCode Prep Insights

Practical guides, tips, and stories on coding interviews and smarter LeetCode practice with AI.

215 articles

How to Choose the Right Coding Interview Prep Tool (2026 Guide)

This guide helps you identify your current stage and choose prep tools that actually work—without wasting time on the wrong ones.

Interview PrepStrategyDecision GuideLeetCodeCoding InterviewFAANG

Alex Wang

25 min

1/7/2026

LRU Cache (LeetCode 146): The Complete Guide to Solving It

LRU Cache is one of the most asked interview questions at FAANG. Here's how to solve it step-by-step with Hash Map + Doubly Linked List.

LeetCodeLRU CacheData StructuresHash MapLinked List

Alex Wang

12 min

1/6/2026

How Much Do FAANG Engineers Make? Complete 2026 Salary Guide

FAANG salaries are higher than you think—but also more complex. Here's the real breakdown of base, bonus, and stock compensation at Google, Meta, Amazon, and Apple.

FAANGSalaryCompensationGoogleMetaAmazonApple

Alex Wang

12 min

1/5/2026

Microsoft Coding Interview: Complete 2026 Guide (Process, Questions, Tips)

Microsoft's interview is unique—less speed-focused than Meta, more about depth and problem-solving approach. Here's exactly what to expect and how to prepare.

MicrosoftInterview PrepCoding InterviewFAANGSystem Design

David Ng

13 min

1/5/2026

How to Start LeetCode as a Complete Beginner (Step-by-Step Guide)

Never solved a LeetCode problem before? This beginner-friendly guide walks you through exactly where to start, what to learn first, and how to build momentum.

LeetCodeBeginnerHow ToInterview PrepGetting Started

David Ng

12 min

1/5/2026

Meta Coding Interview: Complete 2026 Guide (Process, Questions, Tips)

Meta's interview is fast-paced and intense. Here's the exact process, question types, and how to prepare for each round—including the new AI-enabled coding round.

MetaFacebookInterview PrepCoding InterviewFAANG

Alex Wang

13 min

1/5/2026

Dynamic Programming: 7 Patterns That Solve 90% of DP Problems

DP doesn't have to be scary. Master these 7 patterns and you'll be able to solve most dynamic programming problems you encounter in interviews.

Dynamic ProgrammingLeetCodePatternsInterview PrepAlgorithms

David Ng

15 min

1/5/2026

Best Free Coding Interview Prep Resources in 2026 (Complete List)

You don't need to spend hundreds on interview prep. Here are the best free resources for DSA, system design, and behavioral interviews.

Free ResourcesInterview PrepLeetCodeNeetCodeSystem Design

David Ng

12 min

1/2/2026

Best System Design Resources in 2026: Books, Courses, and Free Tools

Preparing for system design interviews? Here are the best resources ranked by quality—from must-read books to free YouTube channels.

System DesignResourcesInterview PrepBooksCourses

Alex Wang

13 min

1/2/2026

Amazon Coding Interview: Complete 2026 Guide (Process, Questions, Tips)

Amazon's interview is unique with its Leadership Principles focus. Here's exactly what to expect, the question types, and how to prepare for each round.

AmazonInterview PrepCoding InterviewLeadership PrinciplesFAANG

Alex Chen

14 min

1/2/2026