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The Java Interview Handbook: 300+ Interview Questions

The ultimate guide to Java interviews with 300+ real-world questions and answers. Get interview-ready in just a few hours with strategies developed by FAANG engineers.

Intermediate

86 Lessons

15h

Certificate of Completion

The ultimate guide to Java interviews with 300+ real-world questions and answers. Get interview-ready in just a few hours with strategies developed by FAANG engineers.
AI-POWERED

Mock Interview

Explanations

AI-POWERED

Mock Interview

Explanations

This course includes

147 Playgrounds
55 Quizzes
Course Overview
Course Content
Recommendations

Course Overview

It’s very common to have interviews testing your knowledge of a programming language you claim to be an expert in. If you've got an interview coming up on Java soon and need to get up to speed, this is the ideal course for you. You'll refresh your memory on everything from the basics to more advanced functionality you’re likely to be asked about. Even if you're using Java every day, you may not have been exposed to parts of it in some time, so it's always useful to make sure you're updated. This course fe...Show More
It’s very common to have interviews testing your knowledge of a programming language you claim to be an expert in. If you've go...Show More

Course Content

1.

Java Ecosystem

5 Lessons

Learn how to use Java, its ecosystem, JVM, editions, and essential development tools.
Introduction
Java & it's Ecosystem
Java Virtual Machine
Java Flavors & Processes
Java Tools & Files

2.

Methods

4 Lessons

Unpack the core of Java's method handling, including varargs, pass-by-value, and method overloading.
Variable Argument Passing
Pass by Value
Pass by Reference
Method Overloading

3.

Classes

11 Lessons

Work your way through Java class concepts, access control, inheritance, and object lifecycles.
Accessibility
The Object Class
Constructors
Initialization
Classes
Nested Classes
Anonymous and Local Classes
Abstract Classes
Final Class
Super Keyword
Finalize

4.

Interfaces

2 Lessons

Grasp the fundamentals of Java interfaces, including method signatures, multiple inheritance, and functional interfaces.
Interfaces
More on Interfaces

5.

Inheritance

3 Lessons

Dig into inheritance, its nuances, and Java's handling of multiple inheritance and method overriding.
Inheritance
Multiple Inheritance
Inheritance Gotchas

6.

Lambda Expressions

2 Lessons

Simplify complex topics of Java lambda expressions, functional interfaces, and type inference.
Basics
More on Lambdas

7.

Generics

10 Lessons

Build on Java generics, covering type safety, raw types, bounded types, and wildcards.
Why Generics
Raw Types
Generic Types
Bounded Types
Type Inference
Erasure
Bridge Methods
Wildcard
The Get & the Put Principle
Reification

8.

Multi-Threading

7 Lessons

Sharpen your skills in Java multi-threading, thread safety, synchronization, and concurrency management.
Fundamentals
Thread Safety
Mutexes vs Semaphores
Synchronized
Volatile
Wait() and Notify()
More on Threading

9.

Memory Management

4 Lessons

Unpack the core of Java memory management, from heap and non-heap areas to memory tuning strategies.
Memory Areas
Reference Strengths
Garbage Collection
Memory Tuning

10.

Collections

3 Lessons

Break apart Java collection types, iteration techniques, and various collection implementations.
Collection Types
Iterating in Java
Summary

11.

Exceptions

4 Lessons

Grasp the fundamentals of exception handling, its types, and best practices in Java.
Exceptions
Checked vs Unchecked
Catch Block
More on Exceptions

12.

Reflection

5 Lessons

Take a closer look at Java reflection, class modifiers, instantiation, and class loaders.
Introduction
java.lang.Class
Class Modifiers
Instantiation using Reflection
Classloaders

13.

Serialization

2 Lessons

Investigate serialization, its process, management techniques, and customizable options with Externalizable.
Basics
More on Serialization

14.

Miscellaneous Topics

8 Lessons

Explore Java typing, keywords, annotations, boxing, unboxing, packages, strings, and casting essentials.
Types
Keywords
Annotations
Boxing
Unboxing
Package
Strings
Casting

16.

Patterns

3 Lessons

Unpack the core of Singleton, Builder, and various essential Java design patterns.
Singleton
Builder
Cheat Sheet

17.

The End

1 Lessons

Break apart the collaborative effort and gratitude expressed in the epilogue.
Epilogue

Course Author

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