Java Interview Guide : 200+ Interview Questions and Answers

About this Course:

Preparing for Java Interview is tricky You would need to get a good understanding of new features and revise concepts you used in your preparation This course helps you prepare for Java Interview with hands-on code examples covering 200+ Java Interview Questions and Answers on varied range of topics listed below

Java Platform:

• Why is Java so popular?
• What is platform independence?
• What is bytecode?
• Compare JDK vs JVM vs JRE
• What are the important differences between C++ and Java?
• What is the role for a classloader in Java?

Wrapper Classes:

• What are Wrapper classes?
• Why do we need Wrapper classes in Java?
• What are the different ways of creating Wrapper class instances?
• What are differences in the two ways of creating Wrapper classes?
• What is auto boxing?
• What are the advantages of auto boxing?
• What is casting?
• What is implicit casting?
• What is explicit casting?

Strings:

• Are all String's immutable?
• Where are String values stored in memory?
• Why should you be careful about String concatenation(+) operator in loops?
• How do you solve above problem?
• What are differences between String and StringBuffer?
• What are differences between StringBuilder and StringBuffer?
• Can you give examples of different utility methods in String class?

Object oriented programming basics:

• What is a class?
• What is an object?
• What is state of an object?
• What is behavior of an object?
• What is the super class of every class in Java?
• Explain about toString method ?
• What is the use of equals method in Java?
• What are the important things to consider when implementing equals method?
• What is the Hashcode method used for in Java?
• Explain inheritance with examples
• What is method overloading?
• What is method overriding?
• Can super class reference variable can hold an object of sub class?
• Is multiple inheritance allowed in Java?
• What is an interface?
• How do you define an interface?
• How do you implement an interface?
• Can you explain a few tricky things about interfaces?
• Can you extend an interface?
• Can a class extend multiple interfaces?
• What is an abstract class?
• When do you use an abstract class?
• How do you define an abstract method?
• Compare abstract class vs interface?
• What is a constructor?
• What is a default constructor?
• Will this code compile?
• How do you call a super class constructor from a constructor?
• Will this code compile?
• What is the use of this()?
• Can a constructor be called directly from a method?
• Is a super class constructor called even when there is no explicit call from a sub class constructor?

What is functional programming?:

• Can you give an example of functional programming?
• What is a stream?
• Explain about streams with an example?
• what are intermediate operations in streams?
• What are terminal operations in streams?
• What are method references?
• What are lambda expressions?
• Can you give an example of lambda expression?
• Can you explain the relationship between lambda expression and functional interfaces?
• What is a predicate?
• What is the functional interface - function?
• What is a consumer?
• Can you give examples of functional interfaces with multiple arguments?

New Features:

• What are the new features in Java 5?
• What are the new features in Java 6?
• What are the new features in Java 7?
• What are the new features in Java 8

Who is the target audience?

• Students who are learning Java
• Students who are planning to attend Java Interviews
• Students who want to add more depth to their Java Knowledge

Course Completion Certificate

What you will learn:

• Understand what kind of questions are asked in Beginner Java Interviews
• Answer questions on Java Platform, Wrapper Classes and Strings
• Understand New Features of Java
• Understand Basic Object Oriented Concepts
• Understand Advanced Object Oriented Concepts
• Answer questions on Collections, Generics and MultiThreading
• Understand New Features in Java 5, Java 6, Java 7 and Java 8
• Understand basics of Functional Programming - Lambda Expressions and Streams
• Understand Exception Handling Best Practices

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