AWS

Question 1: What storage classes are available in Amazon S3? Amazon S3 (Simple Storage Service) provides several storage classes to cater to different data access patterns, durability requirements, and cost considerations. Here are the main storage classes available in Amazon S3: These storage classes offer different combinations of durability, availability, performance, and cost to meet […]

Kafka

Question: What is Kafka partition? In Apache Kafka, a partition is a way to split a topic’s log into multiple parts or partitions. Each partition is an ordered, immutable sequence of records (messages) that is continually appended to. Partitions help in parallelizing and scaling topics in a Kafka cluster. Here are some key points about […]

Sorting an Array of 0s, 1s, and 2s

Problem Statement Given an array of integers where each element is either 0, 1, or 2, sort the array in a way that all 0s come first, followed by all 1s, and then all 2s. For example, given the array {0, 1, 2, 0, 1, 2}, the sorted array should be {0, 0, 1, 1, […]

How to Iterate Over a HashMap in Java: A Comprehensive Guide

Introduction: In Java, the HashMap is a widely used data structure that stores key-value pairs. It is part of the java.util package and provides constant-time performance for basic operations like get and put. However, as a developer, you’ll often need to iterate over the key-value pairs in a HashMap. In this blog post, we’ll explore […]

The Microservices Interview: Top 10 Interview Questions for Experienced Professional

Question 1: What exactly are microservices? Could you explain their purpose? Could you provide a concise explanation? Answer: Microservices is an architectural approach to software development where a monolithic application is broken down into smaller, independent services that communicate with each other through well-defined APIs (Application Programming Interfaces). Each microservice is responsible for a specific […]

Mastering Distributed Locking for Seat Reservations with Java Spring Boot

Introduction: In online ticket booking systems like BookMyShow, ensuring a smooth and reliable seat reservation experience is paramount. With multiple users vying for the same seats simultaneously, the risk of overbooking and data inconsistencies becomes a critical challenge. This is where distributed locking comes into play, providing a robust solution to coordinate access to shared […]

Observability in Microservices: A Comprehensive Guide to Measuring Distributed Systems 🔍

Introduction In the realm of modern software architectures, microservices have become the de facto standard for building scalable, resilient, and flexible applications. 💪 By breaking down monolithic applications into smaller, independently deployable services, microservices offer numerous benefits, such as improved modularity, faster development cycles, and better scalability. ⚡ However, with this architectural shift comes a […]

Java Developers, Unlock Your Future in Generative AI

As a Java developer, you may be wondering how the rise of Generative AI could impact your career. The truth is, your existing skills are incredibly valuable in this new era of software development. Generative AI is not just for data scientists – it presents a wealth of opportunities for traditional software engineers like yourself. […]