Backend - Alpha Technology

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How LSM-Trees Work: Memtables, SSTables, and Compaction

A B-tree updates a leaf in place. That is the right shape when most work is point lookups on a working set that already lives on disk. It is...

Sarthak Bystander 14 Sept, 2026

Backend , Computer Science , Databases

How Write-Ahead Logging Works: Durability Before Data Pages Hit Disk

A committed row that vanishes after a power cut is a broken contract. The database promised durability. RAM is fast and volatile. Disk pages...

Sarthak Bystander 13 Sept, 2026

Backend , Beginner Guide , Computer Science

SQL vs NoSQL Explained: How Databases Differ

SQL vs NoSQL is one of the first architecture choices a developer makes. This guide explains how each model stores data, how queries work in...

Sarthak Bystander 2 Sept, 2026

Backend , Beginner Guide , Computer Science

How Caching Works: A Beginner Guide for Developers

Every time you open a website and it loads in a fraction of a second, caching is probably doing most of the work. Caching is one of the most...

Sarthak Bystander 1 Sept, 2026

Backend , Beginner Guide , Computer Science

How REST APIs Work: Architecture Explained for Beginners

Every time a mobile app loads your profile, a website fetches search results, or one service talks to another, a REST API is usually involve...

Sarthak Bystander 30 Aug, 2026

Backend , Beginner Guide , Computer Science

Database Indexing Explained: How Queries Get Faster

When a query on a large table feels instant, an index is usually doing the work. When the same query crawls, an index is often missing, unus...

Sarthak Bystander 28 Aug, 2026

Backend , Beginner Guide , Computer Science

How Databases Work Internally: Storage, Indexes, Queries and Transactions Explained

How Databases Work Internally: Storage, Indexes, Queries and Transactions Explained Every modern application depends on a database. Whethe...

Sarthak Bystander 14 Aug, 2026

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