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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.

4.5

86 Lessons

15h

Updated 1 week ago

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LEARNING OBJECTIVES

Explain the Java ecosystem, editions, JCP/JSRs, TCKs, and common Java tools for interviews
Analyze JVM components (class loading, runtime data areas, JIT, GC) and core memory regions
Apply Java parameter passing concepts, including pass-by-value, references, and varargs rules
Implement OOP constructs using access modifiers, nested/local/anonymous classes, and inheritance rules
Write type-safe code with generics using bounds, wildcards, erasure, bridge methods, and PECS
Diagnose concurrency issues using threads, synchronized, volatile, wait/notify, and interruption handling
Use core Java features and best practices: exceptions, reflection, serialization, collections, equality, strings

Learning Roadmap

86 Lessons201 Quizzes

Java Ecosystem

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

Methods

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

Classes

11 Lessons

Work your way through Java class concepts, access control, inheritance, and object lifecycles.

Interfaces

2 Lessons

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

Inheritance

3 Lessons

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

Lambda Expressions

2 Lessons

Simplify complex topics of Java lambda expressions, functional interfaces, and type inference.

Generics

10 Lessons

Build on Java generics, covering type safety, raw types, bounded types, and wildcards.

Multi-Threading

7 Lessons

Sharpen your skills in Java multi-threading, thread safety, synchronization, and concurrency management.

Memory Management

4 Lessons

Unpack the core of Java memory management, from heap and non-heap areas to memory tuning strategies.

10.

Collections

3 Lessons

Break apart Java collection types, iteration techniques, and various collection implementations.

11.

Exceptions

4 Lessons

Grasp the fundamentals of exception handling, its types, and best practices in Java.

12.

Reflection

5 Lessons

Take a closer look at Java reflection, class modifiers, instantiation, and class loaders.

13.

Serialization

2 Lessons

Investigate serialization, its process, management techniques, and customizable options with Externalizable.

14.

Miscellaneous Topics

8 Lessons

Explore Java typing, keywords, annotations, boxing, unboxing, packages, strings, and casting essentials.

15.

Java in Practice

12 Lessons

Sharpen your skills in practical Java coding, object design, and concurrency practices.

16.

Patterns

3 Lessons

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

17.

The End

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

Epilogue

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Developed by MAANG Engineers

ABOUT THIS COURSE

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 features more than 300 of the most commonly asked core Java interview questions that you're likely to face as an experienced software engineer. You'll get to explore questions by topic, as well as see detailed answers for each one, and plenty of live code examples where relevant. Get started today.

ABOUT THE AUTHOR

C. H. Afzal

A veteran of the Silicon Valley, I have been fortunate enough to work at some of the iconic companies of present times including Microsoft, Netflix, Cloudera, and Oracle. I have a keen interest in algorithms, product design, finance, and problem-solving.

Learn more about C.

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Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content.

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