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The Draftsbook Blog

Articles, deep dives, and notes from the engineering community.

Oct 7, 20265 min read

Cambridge IELTS 17 Test 3 Reading Answers & Step-by-Step Explanations

Comprehensive guide and answers for Cambridge IELTS 17 Reading Test 3: The Thylacine (Tasmanian Tiger), Palm Oil Production, and Manhattan Skyscrapers Skyline.

By Md. Harun-Or-Roshid

Oct 7, 20264 min read

Cambridge IELTS 16 Test 4 Reading Answers & Step-by-Step Explanations

Step-by-step explanations and strategies for Cambridge IELTS 16 Reading Test 4: Roman Tunnels, Changes in Reading Habits in the Digital Age, and Attitudes Towards AI.

By Md. Harun-Or-Roshid

Oct 7, 20265 min read

Cambridge IELTS 16 Test 3 Reading Answers & Step-by-Step Explanations

Exhaustive solutions and keyword locators for Cambridge IELTS 16 Reading Test 3: Roman Shipbuilding & Navigation, Norway Glacial Archaeology, and Plant Thermometers.

By Md. Harun-Or-Roshid

Oct 7, 20267 min read

Cambridge IELTS 16 Test 2 Reading Answers & Step-by-Step Explanations

In-depth analysis and answer keys for Cambridge IELTS 16 Reading Test 2 covering The White Horse of Uffington, I Contain Multitudes (Microbiome), and How to Make Wise Decisions.

By Md. Harun-Or-Roshid

Oct 6, 20269 min read

Cambridge IELTS 16 Test 1 Reading Answers & Step-by-Step Explanations

Complete answer explanations for Cambridge IELTS 16 Test 1 Academic Reading (Passages 1–3: Polar Bears, Step Pyramid of Djoser, and Future of Work AI) with keyword synonyms and passage locators.

By Md. Harun-Or-Roshid

Mar 13, 20268 min read

Part 2: ACID Transactions, Concurrency Control & High-Throughput Locking in MySQL 9

Master ACID transactions, Multi-Version Concurrency Control (MVCC), undo/redo logs, row locks, gap locks, and deadlock elimination in MySQL 9 strict mode.

By Md. Harun-Or-Roshid

Mar 12, 20268 min read

Part 1: MySQL 9 InnoDB Internals: B+Tree Indexes, Composite Keys & EXPLAIN Profiling

Master MySQL 9 InnoDB internals: clustered vs secondary B+Tree indexes, composite key leftmost prefix rules, page splitting, and EXPLAIN ANALYZE profiling.

By Md. Harun-Or-Roshid

Mar 11, 20268 min read

Part 2: Laravel 13 Core Internals: Service Container, Pipelines & Terminating Middleware

Deep dive into the Laravel 13 HTTP lifecycle: IoC service container reflection, contextual bindings, the Pipeline pattern, and terminating middleware execution.

By Md. Harun-Or-Roshid

Mar 10, 202610 min read

Part 1: PHP 8.4 Architecture: Property Hooks, Asymmetric Visibility & Modern OOP

Master PHP 8.4 architecture: property hooks, asymmetric visibility, virtual properties, typed constants, and modern backend entity encapsulation design.

By Md. Harun-Or-Roshid

Mar 9, 20268 min read

Part 1: Vue 3 Architecture: Composition API, Reactivity Engine & Pinia State

Deep dive into Vue 3 Composition API, ES6 Proxy reactivity engine, ref vs reactive, custom composables, and modern Pinia state management architecture.

By Md. Harun-Or-Roshid

Mar 8, 20268 min read

Part 2: Next.js 15 App Router: Server-Side Rendering, Caching & Streaming Architecture

Master Next.js 15 App Router, React Server Components streaming, partial prerendering, dynamic route segments, and fine-grained cache revalidation strategies.

By Md. Harun-Or-Roshid

Mar 7, 20269 min read

Part 1: React 19 Architecture: Server Components, Server Actions & Transitions

Master React 19 architecture, React Server Components (RSC), Server Actions, progressive enhancement, useActionState, and useOptimistic state hooks.

By Md. Harun-Or-Roshid