Java Backend Interview Prep – 20 Sessions

Crack Java Backend Interviews with a structured 20-session program

This program is designed for 3–10 yrs experienced Java backend engineers preparing for product & service company interviews.

📅 Session Plan

Module 1: Core Java

• OOP, Collections, Multithreading, Memory Management
• Java 8+ features (Streams, Lambdas, Optional)
• Immutability, Design Patterns, ClassLoader basics

Module 2: Spring Boot

• Bean lifecycle, Dependency Injection, AOP
• REST APIs, Exception Handling, Validation
• Spring Data JPA & Transactions
• Spring Security, JWT, OAuth2

Module 3: Databases

• SQL + NoSQL basics
• Joins, Indexing, Query Optimization
• Transactions, Locking, Isolation levels

Module 4: Microservices

• Architecture, Service Discovery, Config Server, API Gateway
• Circuit Breakers, Resilience4j, Feign Clients
• Saga Pattern & Event-driven architecture

Module 5: Kafka & Messaging

• Producers, Consumers, Offsets, Consumer Groups
• Delivery semantics (at-least-once, exactly-once)
• Spring Kafka with real-time scenarios

Module 6: System Design & Mock Interviews (Sessions 17–20)

• Design problems (E-commerce, Payment, Logging system)
• Caching, Scaling, Load Balancing
• 2 Full Mock Interviews (Tech + Design) with detailed feedback

What you’ll get

• 20 structured sessions (90 mins each)
• Real interview Q&A + case studies
• Hands-on coding
• 2 Mock Interviews with personalized feedback