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

Pubblicato il: 25 settembre 2025
sul canale di: Code Decode

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In this video of code decode we have covered top full stack developer interview questions for experienced developers

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🔹 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:
   • Mock Interviews (Face to Face)

Most Asked Core Java Interview Questions and Answers:    • Core Java frequently asked Interview Quest...

Advance Java Interview Questions and Answers:    • Advance Java Interview Questions

Java 8 Interview Questions and Answers:
   • Java 8 Interview Questions(New Features)

Hibernate Interview Questions and Answers:
   • Hibernate Interview Questions Java

Spring Boot Interview Questions and Answers:
   • Advance Java Interview Questions

Angular Playlist:
   • Angular Course Introduction || Angular 8
SQL Playlist:    • SQL Interview Questions and Answers

GIT:    • GIT

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