Uma Mahesh

Introduction Indexing is a fundamental technique in database systems to enhance query performance, enabling rapid data retrieval by minimizing the need to scan entire datasets. By creating data structures that provide efficient access paths to data, indexes significantly reduce query…

Introduction Durability is a cornerstone of the ACID (Atomicity, Consistency, Isolation, Durability) properties that ensure reliable database transactions, guaranteeing that once a transaction is committed, its changes are permanently saved, even in the event of system failures such as power…

Introduction In database systems, ensuring the reliability and consistency of data operations is critical, particularly for applications requiring high integrity, such as financial systems, e-commerce platforms, and enterprise resource planning (ERP) systems. ACID transactions provide a framework to guarantee that…

Introduction In system design interviews, selecting the appropriate database is a critical skill that demonstrates a candidate’s ability to align technical choices with system requirements. The decision involves analyzing functional and non-functional requirements, understanding trade-offs, and justifying selections with clarity…

Concept Explanation Databases are critical components of modern applications, providing structured storage and retrieval mechanisms for data. The choice of database type depends on the application’s data structure, scalability needs, consistency requirements, and performance goals. The landscape of databases is…

Concept Explanation SQL (Structured Query Language) and NoSQL (Not Only SQL) databases represent two fundamental paradigms for storing and managing data in modern applications. SQL databases, also known as relational databases, organize data into structured tables with predefined schemas, using…

Concept Explanation A service mesh is a dedicated infrastructure layer that manages service-to-service communication in microservices architectures, providing features such as traffic routing, observability, security, and resilience without modifying application code. Technologies like Istio and Linkerd are prominent service mesh…

Concept Explanation gRPC (gRPC Remote Procedure Call) and Protocol Buffers (Protobuf) are powerful technologies designed for high-performance, low-latency communication in distributed systems. gRPC and Protobuf are widely adopted in microservices architectures by companies like Google, Netflix, and Uber, enabling efficient,…

Introduction Representational State Transfer (REST) APIs have become a cornerstone of modern software architecture, facilitating seamless communication between clients and servers in distributed systems. As of 05:39 PM IST on Friday, October 10, 2025, REST remains a dominant paradigm for…