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Lessons (40)

• Python and Math Foundations with Runnable Examples

  … SQL helps you select training examples; HTTP and JSON help you integrate models into an application. A web …

• Machine Learning Fundamentals

  Learn how models use examples to make predictions, and how supervised, unsupervised, and reinforcement learning differ. The big …

• AI Specialties and Real-World Examples

  … list of research topics. Area Input → output Practical example What to learn --- --- --- --- Computer vision Pixels → labels, boxes, or …

• Data Preparation and Model Training

  Turn raw data into trustworthy examples, prevent leakage, and build repeatable training experiments. The big idea Model quality …

• What Is Artificial Intelligence? A Developer's Guide

  Understand AI, machine learning, deep learning, and generative AI through everyday examples and concrete software decisions. Start with …

• Normalization & Denormalization

  Learn 1NF, 2NF, 3NF and BCNF with one concrete order example, then decide when a controlled denormalized read …

• AWS Interview Questions: Clear Answers

  Practice short, correct AWS answers by explaining the trade-off, the safe default, and one real example. How …

• AI Evaluation, Safety, and Security

  … Keep evaluation examples separate from the examples used to tune prompts or models. Define what “good” means before …

• What to Learn in AI, and in What Order

  … Build intuition with examples; you rarely need advanced proofs to start. 3. Machine learning: Understand features, labels, training …

• DSA Interview Patterns Cheat Sheet

  … 2. Examples: work one normal example and one edge case by hand. 3. Brute force: say it out …

• Kubernetes: Start Here

  … registry.example.com/shop-api:1.8.0 You save that as a YAML file and apply it …

• Train Your First Model from Scratch

  Run a complete linear-regression experiment, compare a baseline, inspect loss, and evaluate on unseen examples. The problem …

• Pods: Where Your App Actually Runs

  … A log helper is a common example. Two unrelated services should normally be separate Deployments. Two helper patterns …

• Prompting and Structured Outputs

  Write clear instructions, provide context and examples, constrain responses, and validate model output in code. The big idea …

• Recursion & Backtracking

  … Do a little work and call yourself on a smaller problem. Example 1: countdown js function countdown(n …

• Design System Operations

  … clear APIs, accessible behavior, tokens, examples, versioning and a path for migration. mermaid flowchart LR T[Tokens] -- P …

• Domains, Load Balancers and HTTPS

  … app.example.com] -- D[Route 53 DNS] D -- A[Application Load Balancer] A -- T[Healthy app target] Route …

• Extending Kubernetes: CRDs, Operators and Admission

  … backups.shop.example.com spec: group: shop.example.com scope: Namespaced names: kind: Backup plural: backups singular: backup …

• SQL vs NoSQL Databases

  … the four promises Letter Promise Example --- --- --- A tomicity All or nothing Transfer $100: debit AND credit both happen …

• Resilient Service Calls: Retries, Breakers and Load Shedding

  … cached product details may be okay; a payment result must be “processing/unknown” until reconciled. Example dependency policy …

• KISS: Keep It Simple, Stupid

  … no copying on every step) const ordersByCustomer = Object.groupBy(orders, (order) = order.customerId); Example 2: Over-engineering a …

• GitOps, Progressive Delivery and Observability

  … https://github.com/example/platform.git targetRevision: main path: apps/shop-api/overlays/prod destination: server: https://kubernetes …

• ACID, Transactions & Locks

  … without vague definitions Property What it protects Concrete example --- --- --- Atomicity Partial change Order and its items save together …

• Comments & Formatting

  … Code is executed and tested; comments are not. Comments that help Type Example --- --- Why (a decision) // Use insertion …

• Atomic Design & Component Libraries

  … design tokens, interaction rules, accessibility requirements, documentation, and ownership. The five levels Level Responsibility Example Should it know …

• Meaningful Names

  … Once you follow this, code reads like English. Thing Grammar Good examples Bad examples --- --- --- --- Variable / object noun user …

• Dynamic Programming

  … memory? Harder ✅ Often keep only the last row Example 1: climbing stairs ⭐ You can climb 1 or 2 …

• Neural Networks and Deep Learning

  … A forward pass computes predictions from a batch of examples. 2. A loss function compares predictions with targets …

• Transformers and Large Language Models

  … Fine-tuning changes model parameters using additional examples. Retrieval instead supplies relevant external information in the prompt at …

• How Browsers Render a Page

  … Composite Some elements get their own layers (for example, elements with transform or opacity animations, or will-change …

• Services and Ingress: Let Traffic Find Your App

  … api.shop.example.com http: paths: - path: / pathType: Prefix backend: service: name: shop-api port: number: 80 Important …

• Providers and Your First AWS Resources

  … The role needs permissions for the illustrated S3 operations. A complete private bucket example Save as main.tf …

• Deployments: Keep Your App Running

  … registry.example.com/shop-api:1.8.0 ports: - containerPort: 3000 readinessProbe: httpGet: path: /health/ready port: 3000 …

• System Design Interview Framework

  … stopped being acceptable. A 45-minute example plan Minutes Do Example question ---: --- --- 0–5 Clarify product and success …

• Two Pointers & Sliding Window

  … Learn them with animated-style diagrams and classic interview examples. Two Pointers The big idea Two people searching …

• AWS: Start Here

  … Run it before a change. A familiar example: move a small shop online Imagine you sell books. Your …

• Storage, Search and Location Queries

  … details Three questions, three tools Need Typical tool Example --- --- --- Store a 2 GB video Object storage S3-like …

• StatefulSets, DaemonSets, Jobs and CronJobs

  … registry.example.com/shop-api:1.9.0 command: ["node", "migrate.js"] For parallel work, set completions (how …

• Frontend Security

  … default-src 'self'; script-src 'self' 'nonce-r4nd0m'; img-src 'self' https://cdn.example.com data:; connect-src …

• Design a Chat Application

  … A WebSocket connection existing does not prove a user saw the message. Failure and scale example If a …