Databases

27 interview prep topics with adaptive MCQ tests.

PostgreSQL
PostgreSQL has solidified its position in 2026 as the industry-standard relational database for mission-critical…
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Redis
Redis (Remote Dictionary Server) has evolved from a simple key-value store into the backbone of modern, real-time…
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MongoDB
MongoDB is the world's most popular document-oriented NoSQL database, and in 2026 it remains the go-to choice for…
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Cache Eviction Policies: LRU, LFU, and System Design
Cache eviction policies are the fundamental decision-making algorithms that determine which data to remove from a cache…
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Cache Penetration & Stampede
Cache Penetration and Cache Stampede are critical failure modes in high-scale distributed systems. Cache Penetration…
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Cassandra Architecture
Cassandra architecture is a cornerstone of modern distributed systems design, prized for its linear scalability and…
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CDN Caching Strategies
CDN Caching Strategies represent the critical architectural layer between global users and origin infrastructure. In…
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DynamoDB Partitioning
DynamoDB partitioning is the fundamental mechanism that enables Amazon DynamoDB to provide consistent, single-digit…
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Redis Cluster and Sharding
Redis Cluster and Sharding are critical architectural components for scaling high-performance data stores in 2026. As…
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Mastering Redis Pub/Sub: Technical Interview Guide
Redis Pub/Sub is a lightweight messaging paradigm enabling real-time communication between decoupled services. In 2026,…
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Time-Series Databases (InfluxDB, TimescaleDB)
Time-Series Databases (TSDBs) are specialized data stores optimized for handling high-velocity, timestamped data…
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Write-Through vs Write-Back Caching
In modern distributed systems, choosing the correct cache update strategy is a foundational decision that directly…
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ClickHouse OLAP Database
ClickHouse is an open-source, high-performance columnar database management system designed for online analytical…
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Database Design: OLTP vs OLAP
Mastering the fundamental contrasts between Online Transaction Processing (OLTP) and Online Analytical Processing…
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Database Transactions: ACID vs BASE
Database transactions form the foundational contract of data integrity across modern software architectures, dictating…
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Databricks Lakehouse Architecture
The Databricks Lakehouse Architecture merges the best elements of data lakes and data warehouses, providing ACID…
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Elasticsearch Server Architecture
Elasticsearch server architecture sits at the core of high-throughput distributed search and real-time analytics…
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Firebase & Google Firestore
Preparing for backend and full-stack technical interviews in 2026 requires a deep comprehension of managed…
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Google Cloud Spanner
Google Cloud Spanner is a globally distributed, horizontally scalable, relational database management system that…
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Memcached Architecture
Memcached is a high-performance, distributed memory object caching system designed primarily to speed up dynamic…
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Microsoft SQL Server
Preparing for Microsoft SQL Server interviews in 2026 requires mastery over core relational database concepts, advanced…
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MySQL Database Core
The MySQL Database Core interview evaluation is a cornerstone of senior backend and database engineering assessments.…
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Neo4j graph database
Neo4j graph database technology has transitioned from a niche NoSQL alternative to an indispensable enterprise engine…
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NoSQL Database Models
NoSQL database models have evolved from alternative storage solutions into core pillars of modern distributed system…
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Oracle Database Architecture
The Oracle Database Architecture Interview Guide covers the foundational and advanced internal structures, memory…
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Snowflake Data Warehouse
The Snowflake Data Warehouse platform has fundamentally redefined enterprise data architectures by pioneering a fully…
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SQLite architecture
SQLite architecture represents a marvel of lightweight, serverless database engineering, functioning as an in-process…
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