Your next interview starts here.

AI Coding at Work

• Scope an AI coding task
• Write rules for coding agents
• Run coding agents in parallel
• Review AI code with a counterexample

AI engineering explained

• RAG in 60 seconds
• Embeddings
• Prompt injection
• Why AI hallucinates
• Agents vs workflows
• Fine-tuning vs RAG vs prompting
• What is MCP?
• Temperature
• Context windows
• Evals
• Vector databases
• Tool calling
• Attention and transformers

AI Explained

• The Next Word

AI-assisted coding

• How senior engineers use AI agents
• The AI-allowed interview round
• 5 things never to let AI do
• AI wrote it. Can you defend it?
• Ticket to pull request with agents
• Claude Code vs Codex vs Cursor

Building AI Products

• Choose an AI feature worth building
• Build an editable AI draft
• Measure AI feature quality
• Roll out an AI feature safely

Cheat Sheets

• Which Pattern?
• Which Data Structure?
• Big-O Cheat Sheet
• Which Graph Algorithm?
• SQL or NoSQL?
• Monolith or Microservices?
• Array, List or Hash Map?
• Which Cache Strategy?
• When to Add a Message Queue
• Which Sorting Algorithm?

CS fundamentals in 60 seconds

• Recursion and the call stack
• Why a hash map lookup is O(1)
• The nested-loop trap
• Process vs thread
• Stack vs heap memory
• Race conditions and locks
• TCP vs UDP
• Garbage collection

Famous Questions

• Two Sum
• Valid Parentheses
• Reverse a Linked List
• Longest Substring Without Repeats
• Number of Islands
• Best Time to Buy and Sell Stock
• LRU Cache
• Detect a Cycle
• Maximum Subarray
• Group Anagrams
• Product Except Self
• Merge Two Sorted Lists

Frontend and React

• How React re-renders
• useEffect in 60 seconds
• Keys in lists
• SSR vs CSR vs SSG
• Core Web Vitals
• The browser rendering pipeline
• Where should state live?
• Virtual DOM and reconciliation

Infra, DevOps and Cloud

• Docker vs Virtual Machines
• What Kubernetes Does
• CI/CD Pipeline
• Blue-Green and Canary Deployments
• Logs, Metrics and Traces
• CDN
• Serverless Still Has Servers
• Scale Up or Scale Out?

Interview Craft

• Tell Me About Yourself
• Stuck in a Coding Interview? Say This.
• Salary Expectations
• Why Did You Leave? After a Layoff
• STAR in 60 Seconds
• The 7-Step Coding Protocol
• Your Biggest Weakness
• 5 Questions to Ask Your Interviewer
• Negotiate Your Offer
• Take-Home Assignments: Scope, Run, Test, Explain
• Interview Red Flags: Five Fixable Habits
• What System Design Interviewers Score

Interview Patterns

• Sliding Window
• Binary Search
• Hash Map
• Two Pointers
• Dynamic Programming
• BFS vs DFS
• Heap and Top K
• Intervals
• Prefix Sums
• Backtracking
• Tries
• Monotonic Stack
• Tree Traversals
• Union-Find

Interview Practice

• Turn constraints into an algorithm
• Five edge cases before you submit
• Find the minimum ship capacity
• Find the shortest maze path
• Tell me about a mistake
• Tell me about a disagreement
• Five Python interview questions
• Five Git interview questions

Interview Practice II

• Git undo cheat sheet
• SQL pagination cheat sheet
• Count subarrays that sum to K
• Schedule courses with prerequisites
• Tell me about feedback you received
• Why do you want this role?
• Five SQL interview questions
• Five HTTP status code questions

Interview Q&A: model answers

• 5 JavaScript interview questions
• 5 React questions
• 5 Node.js and backend questions
• 5 database questions
• 5 system design questions
• 5 behavioral questions
• 5 AI engineer questions
• 5 DevOps and cloud questions
• 5 security questions
• 5 questions about AI coding tools

JavaScript and TypeScript gotchas

• Predict the output: Promise vs setTimeout
• The event loop in 60 seconds
• The closure-in-a-loop bug
• Why Node is single-threaded but fast
• Debounce vs throttle
• What is this? The 4 rules
• Promise.all vs allSettled vs race vs any
• Shallow vs deep copy
• == vs ===
• any vs unknown vs never

Python essentials

• The GIL
• Generators and yield
• Decorators
• async and await in Python

Security and auth

• SQL Injection
• XSS in 60 seconds
• CSRF
• How to store passwords
• HTTPS and TLS
• Authentication vs authorization

System Design

• Design a URL Shortener
• The 45-Minute Design Framework
• Rate Limiter: Token Bucket
• Caching: Hits, Misses and Stale Data
• Chat Message Delivery
• Consistent Hashing
• Load Balancers
• Database Sharding
• CAP: The Partition Trade-Off
• Back-of-the-Envelope Math

Web, Backend and Databases

• What Happens When You Type a URL
• Database Indexes
• JWT vs Sessions
• The N+1 Query Problem
• Idempotency
• SQL Joins
• OAuth and Login
• REST vs GraphQL
• ACID Transactions
• CORS