Java Interview Preparation || 100+ Quality Questions Covered

Course Curriculum

Chapter 1: Introduction

Lecture 1: Introduction

Lecture 2: Practice Code

Chapter 2: Java Basics

Lecture 1: What is JVM, JRE and JDK ?

Lecture 2: Difference between Path and Classpath

Lecture 3: Is Java platform independent ? Why ?

Lecture 4: Difference between Java and C++

Lecture 5: What if I write static public void instead of public static void ?

Lecture 6: Explain Access Modifiers in Java.

Chapter 3: OOPs Concepts

Lecture 1: Explain OOPs Concepts With Real Time Examples

Lecture 2: How to prevent inheritance and method overriding ?

Lecture 3: Can we declare main method as final ?

Lecture 4: Is Multiple inheritance supported in Java ? Why ?

Lecture 5: Execution sequence for static block, block, constructor and method.

Lecture 6: Can we run abstract class which has main method ?

Lecture 7: What is Marker Interface ?

Lecture 8: Difference between an Interface and Abstract Class

Lecture 9: Can we override a static method ?

Lecture 10: Can we make constructors static ?

Lecture 11: Can we override the overloaded method ?

Lecture 12: Can we override the private methods ?

Lecture 13: Difference between Constructor and Method ?

Lecture 14: Can we execute a program without main() method ?

Lecture 15: Can you use abstract and final both with a method ?

Lecture 16: Can we declare a constructor as final ?

Lecture 17: Can we declare an interface as final ?

Lecture 18: Distinguish between static loading and dynamic class loading ?

Chapter 4: Exception

Lecture 1: Difference between Checked and Unchecked Exceptions

Lecture 2: How to create Custom Exception Class ?

Lecture 3: Is there any case when finally will not be executed ?

Lecture 4: Which is the base class of all exception classes ?

Lecture 5: Explain about Exception Propagation

Lecture 6: Difference between throw and throws.

Lecture 7: Difference between Error and Exception.

Chapter 5: Collection

Lecture 1: Difference between List and Set

Lecture 2: Unmodifiable Collcetion

Lecture 3: What is UnSupportedOperationException ?

Lecture 4: Difference between peek(),poll() and remove() method of the Queue interface.

Lecture 5: How HashMap internally works ?

Lecture 6: How HashSet works internally ?

Lecture 7: Difference between ArrayList and Vector

Lecture 8: Difference between HashMap and HashTable

Lecture 9: Difference Between Iterator And Enumeration

Lecture 10: Difference between Iterator and ListIterator

Lecture 11: Difference between Fail Fast iterator and Fail Safe iterator

Lecture 12: How Fail Fast Iterator come to know that the internal structure is modified ?

Lecture 13: Difference between HashSet and TreeSet

Lecture 14: Difference between HashMap and ConcurrentHashMap

Lecture 15: Difference between ArrayList and LinkedList

Lecture 16: Why Map interface does not extend the Collection interface ?

Lecture 17: What is hash-collision ? How it is handled in Java ?

Lecture 18: How do you convert a given Collection to SynchronizedCollection ?

Lecture 19: Why ArrayList is better than Arrays ?

Lecture 20: For addition and deletion. Which one is most preferred ArrayList or LinkedList ?

Lecture 21: For searches. Which one is most preferred: ArrayList or LinkedList ?

Lecture 22: Difference between Array and ArrayList.

Lecture 23: Explain TreeMap.

Lecture 24: Difference between HashMap and TreeMap

Lecture 25: What is the difference between Collection and Collections ?

Chapter 6: Design Pattern

Lecture 1: Singleton Design Pattern

Lecture 2: Factory Design Pattern

Lecture 3: How to create Immutable Class ?

Lecture 4: Difference between Static Class and Singleton Class ?

Lecture 5: Which design patterns are used in JDK ?

Chapter 7: Java 8 Interview Questions

Lecture 1: Introduction To Java 8

Lecture 2: What is Functional Interface ?

Lecture 3: What is Lambda Expression ?

Lecture 4: What is Stream API ?

Lecture 5: What is Optional ?

Lecture 6: What is StringJoiner ?

Lecture 7: Difference between Collection API and Stream API

Lecture 8: What kind of variable you can access in an lambda expression ?

Lecture 9: Difference between Iterator and Spliterator

Lecture 10: Differences between Java’s OLD Date API and Java 8’s Date and Time API

Chapter 8: Serialization

Lecture 1: What is Serialization ?

Lecture 2: What is Deserialization ?

Lecture 3: What is transient variable ?

Lecture 4: What is SerialVersionUID ?

Chapter 9: Other Questions

Lecture 1: In how may ways we can create an object in Java ?

Lecture 2: What is Ternary Operator ?

Lecture 3: What is the purpose of a Volatile Variable ?

Lecture 4: What is Externalizable ?

Lecture 5: What is the difference between a static and a non-static inner class ?

Lecture 6: What are order of precedence and associativity, and how are they used ?

Lecture 7: What is the difference between inner class and nested class ?

Lecture 8: Difference between StringBuffer and StringBuilder

Lecture 9: this() Vs super()

Lecture 10: Can you use this() and super() both in a constructor ?

Lecture 11: Difference between flush() and close()

Lecture 12: What is anonymous inner class ?

Lecture 13: What is Classloader in Java ?

Lecture 14: Explain Annotation