Java Questions and Answers

Highlights
– 1000+ Multiple Choice Questions & Answers in Java with explanations
– Lots of MCQs with Java code/programming snippet and its output
– Every MCQ set focuses on a specific topic in Java Language

Who should Practice these Java Questions?
– Anyone wishing to sharpen their skills on Java programming language
– Anyone preparing for aptitude test in Java (both objective type test and Java coding written test)
– Anyone preparing for interviews (campus/off-campus interviews, walk-in interview and company interviews)
– Anyone preparing for entrance examinations and other competitive examinations
– All – Experienced, Freshers and Students

Here’s list of Questions & Answers on Java Programming covering 100+ topics:

1. Qusetions and Answers on Data Types, Variables and Arrays

The section contains questions on integer, character, floating and boolean data types, variables, type casting and conversions and properties of arrays.

– Integer and Floating Data Types – Character and Boolean Data Types – Literals & Variables

– Type Conversions, Promotions and Castings – Arrays

2. Questions on Operators and Control Statements

The section contains questions on arithmetic, bitwise, relational, boolean and assignment operators. The section also contains questions on control statements.

– Arithmetic Operators – Bitwise Operators – Relational Operators and Boolean Logic Operators

– Assignment Operators and Operator Precedence – Control Statements

3. Questions and Answers on Classes and Methods

The section contains questions on fundamentals of classes, object creation, constructors, method overloading and static keyword.

– Class Fundamentals & Declaring objects – Introduction to Methods – Constructors & Garbage Collection – Overloading Methods & Argument Passing

– Access Control – Arrays Revisited & Keyword static – String Class

4. Questions and Answers on Inheritance and String Handling

The section contains questions on the concepts of objects, method overriding, inheritance and string handling functions like stringbuffer class and methods and other string comparison functions.

– Inheritance – Method overriding – The Object Class – String Handling Basics – Character Extraction

– String Comparison – Searching & Modifying a String – StringBuffer class – StringBuffer Methods

5. Questions and Answers on Packages and Interfaces

The section contains questions on packages, interfaces and various concepts of java.lang like data types, types of classes, character and byte streams.

– Packages – Interfaces – Java.lang Introduction – Java.lang – Integer, Long And Character Wrappers – Java.lang – Void, Process and System Class

– Java.lang – Object & Math Class – Java.io Introduction – Java.io Byte Streams – Java.io Character Streams

6. Questions and Answers on Networking and Serialization

The section contains questions and answers on basics of networking, serialization and deserialization, aspects of java.util like maps, array list, hash set, tree set, linked list, stacks, vectors, dictionary and hash table. The questions under networking covers topics of URL, http response, url connection, servers, sockets and httpd class.

– Serialization – Serialization & Deserialization – Networking Basics – URL class – HttpResponse & URLConnection Class – networking – Server, Sockets & httpd Class – networking – httpd.java Class – networking – Datagrams

– Java.util – ArrayList Class – Java.util – LinkedList, HashSet & TreeSet Class – Java.util – Maps – Java.util – Array Class – Java.util – Vectors & Stack – Java.util – Dictionary, Hashtable & Properties – Java.util – BitSet & Date class

7. Questions on Exception Handling

The section contains questions on basics of exception handling, exception types like throw, throws and nested try.

– Methods Taking Parameters – Exceptional Handling Basics

– Exceptions Types – Throw, Throws & Nested Try

8. Questions and Answers on Multithreading

The section contains questions and answers on basics of multithreading, thread basics, thread creation, isAlive(), join() and thread synchronization basics.

– isAlive(), Join() & Thread Synchronization – Implementing Runnable interface for Threads – Thread class – Multithreading Basics

– Networking Basics – Finally & Built in Exceptions – Creating Threads

9. Questions on I/O

The section contains questions and answers on basics of I/O, file reading and writing and reading console i/p and writing console o/p.

– Input & Output Basics – Reading Console Input

– Writing Console Output – Reading & Writing Files

10. Questions and Answers on Applets

The section contains questions on fundamentals of applets, RMI and java API packages.

– Applets Fundamentals – Core Java API Packages

– Remote Method Invocation (RMI) – Text Formatting

11. Questions on Event Handling

The section conatins questions on basics of event handling, different types of event handling classes like actionevent, componentevent, containerevent, textevent, mouseevent, windowevent and other event listener interfaces.

– Event Handling Basics – ActionEvent & AdjustmentEvent Class – ComponentEvent, ContainerEvent & FocusEvent Class

– MouseEvent, TextEvent & WindowEvent Class – Event Listeners Interfaces

12. Questions and Answers on Java.lang Package

The section contains questions on classes, methods, functions and wrappers of java.lang package. These include rounding functions, math methods, byte, short, double and float wrappers and runtime and classloader classes.

– Java.lang – Rounding Functions – Java.lang – Miscellaneous Math Methods & StrictMath Class – Java.lang – ThreadGroup class & Runnable Interface – Java.lang – System Class Advance – Java.lang – Double & Float Wrappers – Java.lang – Byte & Short Wrappers – Java.lang – Character Wrapper Advance

– Java.lang – Boolean Wrapper Advance – Java.lang – Runtime & ClassLoader Classes – java.lang – Class

13. Questions and Answers on Collection Framework

The section contains questions on collection interface and algorithms, iterators and command line arguments, locale, random, observable and timer classes, generic methods and type interfaces.

– Collection Framework Overview – Collections Interface – Collection Algorithms – Iterators – Locale & Random Classes – Observable & Timer Class – Restrictions On Generics – Wildcards

– Recursion – Command Line Arguments – Inheritance – Abstract Class and Super – Try & Catch – Creating Exceptions – Generics – Generic Methods – Type Interface

If you would like to learn Java Programming thoroughly, you should attempt to work on the complete set of Java questions and answers mentioned above. It will immensely help anyone trying to crack Java Programming or an interview.