Watch Top Fullstack developer Interview Questions for exp | Angular | Java | Spring Boot | Code Decode Video Tutorial

In this video of code decode we have covered top full stack developer interview questions for experienced developers Udemy Course Discounted coupon code https://www.udemy.com/course/master-spring-boot-microservice-angular-with-k8s-cicd-aws/?couponCode=CODEDECODESEPTEMBER 🔹 Part 1: Java Core – Immutable ClassesWe start with the foundation of immutability in Java. You will learn: * What makes a class immutable and why immutability matters. * The rules for designing an immutable class in Java (final class, private final fields, no setters, defensive copies). * Real-time examples where immutability is essential:✔ Java String class and security benefits✔ Concurrency in multi-threaded applications✔ Caching and usage in HashMap / HashSet keys✔ Domain-driven design with Value Objects✔ Functional programming and stream pipelines✔ Configurations, constants, and environment variables By the end, you’ll understand why core classes like String, Integer, LocalDate are designed as immutable in Java. 🔹 Part 2: Spring Boot & Microservices MaintainabilityWe move to backend architecture with Spring Boot. You’ll learn: * How to structure a Spring Boot microservice using layered architecture (controller, service, repository, config, exception, DTOs). * Why you should use DTOs and mappers instead of exposing entities. * Centralized exception handling with ControllerAdvice. * Externalizing configurations with profiles and config servers. * Proper use of dependency injection with interfaces. * Logging, monitoring, and health checks with Spring Boot Actuator. * Testing strategy (unit, integration, contract). * Swagger/OpenAPI for API documentation. * Modularization tips for large-scale microservices. This section focuses on maintainability, scalability, and best practices followed in enterprise projects. 🔹 Part 3: Configuration Management in Spring BootHandling different environments (dev, test, prod) is crucial. You’ll learn: * How to use Spring profiles (application-dev.yml, application-prod.yml). * Externalized configs via environment variables and command-line args. * Centralized management with Spring Cloud Config Server. * Secure handling of secrets using Vault, AWS Secrets Manager, or Kubernetes Secrets. * Best practices for cloud-native deployments using ConfigMaps and environment variables. 🔹 Part 4: Angular – Calling REST APIsOn the frontend, we explore how Angular handles API integration. Topics include: * Using HttpClient service for GET, POST, and other calls. * Building reusable services for clean code. * Handling errors gracefully using RxJS catchError. * Retrying failed API calls with retry and retryWhen. * Using HttpInterceptors for centralized error handling, retries, and token management. * Consuming APIs in Angular components with async and subscribe patterns. 🔹 Part 5: Databases – NoSQL vs RDBMSChoosing the right database is a key architectural decision. You’ll learn: * When to use relational databases like MySQL or PostgreSQL. * When to prefer NoSQL databases like MongoDB, Cassandra, or Redis. * Use cases for each: transactions, user profiles, logging, caching, analytics. * Hybrid approach for modern full-stack applications. 🔹 Part 6: CI/CD for Java + Angular MicroservicesFinally, we dive into DevOps and automation: * Setting up Git and version control best practices. * CI pipelines using GitHub Actions or Jenkins. * Building Java backend and Angular frontend with automated tests. * Dockerizing applications and pushing images to registries. * CD pipelines with Kubernetes, ArgoCD, or AWS CodePipeline. * Environment separation: dev, staging, prod with approval gates Mock Interview Playlist: https://www.youtube.com/playlist?list=PLyHJZXNdCXsdKpIT19C1nlZH_HROXyROF Most Asked Core Java Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXscoyL5XEZoHHZ86_6h3GWE1 Advance Java Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsexOO1VQ4vs-BM2-8CKrixd Java 8 Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsdeusn4OM33415DCMQ6sUKy Hibernate Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsdC-p2186C6NO4FpadnCC_q Spring Boot Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsexOO1VQ4vs-BM2-8CKrixd Angular Playlist: https://www.youtube.com/watch?v=CAl7RQSdq2Q&list=PLyHJZXNdCXsfxRtDwtGkDD_lLfTWc1g0i SQL Playlist: https://www.youtube.com/playlist?list=PLyHJZXNdCXse86eLuwy5uZohd_bddE9Ni GIT: https://youtube.com/playlist?list=PLyHJZXNdCXscpl6pxOnL2lRWJlzvzjyZE Subscriber and Follow Code Decode Subscriber Code Decode: https://www.youtube.com/c/CodeDecode?sub_confirmation=1 LinkedIn : https://www.linkedin.com/in/codedecodeyoutube/ Instagram: https://www.instagram.com/codedecode25/ #fullstack #codedecode #interviewquestions