Databases & Data Persistence
Explore all 5 posts in the Databases & Data Persistence series
Quizzes
4 items
Database Design & Patterns
- Mohammad Abu Mattar
- Backend
- Database
- 20 Questions
- Published: 10 Mar, 2026
- Level: Intermediate
Welcome to the Database Design & Patterns Quiz! Test your knowledge on database normalization, indexing, query optimization, ACID properties, sharding, replication, and more. Each question has a hint
Elasticsearch: Full-Text Search Engine Fundamentals
- Mohammad Abu Mattar
- Elasticsearch
- Search
- Quizzes
- 20 Questions
- Published: 23 Feb, 2026
- Level: Intermediate
Welcome to the Elasticsearch Basics Quiz! Elasticsearch is the powerhouse behind modern log analysis and real-time search. Whether you are troubleshooting a production crash by digging through Filebea
MongoDB: NoSQL Database Fundamentals
- Mohammad Abu Mattar
- NoSQL
- MongoDB
- Quizzes
- 20 Questions
- Published: 22 Feb, 2026
- Level: Intermediate
Welcome to the MongoDB Basics Quiz! NoSQL databases changed the way we handle modern web scale data. Understanding the document model, the flexibility of BSON, and the power of the aggregation pipelin
SQL: Query Fundamentals & Database Concepts
- Mohammad Abu Mattar
- SQL
- Databases
- Quizzes
- 20 Questions
- Published: 21 Feb, 2026
- Level: Beginner
Welcome to the SQL Basics Quiz! Relational databases are the bedrock of modern applications. Whether you're a developer writing queries or a DevOps engineer maintaining a production cluster, mastering
Case Studies
1 item
Zero-Downtime PostgreSQL Major-Version Upgrade at Scale
- Mohammad Abu Mattar
- DevOps
- Databases
- Cloud Computing
- Published: 25 Jul, 2026
- Updated: 25 Jul, 2026
A multi-terabyte PostgreSQL 12 database was reaching end of life, and the business ran around the clock, so the usual answer of "schedule a maintenance window" was off the table. We upgraded it to Pos