Java Tutorial
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Java Control Statements
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Object Oriented Programming
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Java Built-in Classes
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Java File Handling
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Java Error & Exceptions
- Java - Exceptions
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- Java - Nested try Block
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- Java - throw Exception
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Java Multithreading
- Java - Multithreading
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Java Synchronization
- Java - Synchronization
- Java - Block Synchronization
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- Java - Inter-thread Communication
- Java - Thread Deadlock
- Java - Interrupting a Thread
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Java Networking
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Java Collections
Java List Interface
Java Queue Interface
Java Map Interface
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Java Set Interface
- Java - Set Interface
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Java Data Structures
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- Java - BitSet Class
- Java - Dictionary
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Java Collections Algorithms
Advanced Java
- Java - Command-Line Arguments
- Java - Lambda Expressions
- Java - Sending Email
- Java - Applet Basics
- Java - Javadoc Comments
- Java - Autoboxing and Unboxing
- Java - File Mismatch Method
- Java - REPL (JShell)
- Java - Multi-Release Jar Files
- Java - Private Interface Methods
- Java - Inner Class Diamond Operator
- Java - Multiresolution Image API
- Java - Collection Factory Methods
- Java - Module System
- Java - Nashorn JavaScript
- Java - Optional Class
- Java - Method References
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- Java - Base64 Encode Decode
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- Java - Teeing Collectors
- Java - Microbenchmark
- Java - Text Blocks
- Java - Null Pointer Exception
- Java - Packaging Tools
- Java - Sealed Classes
- Java - Record Classes
- Java - Hidden Classes
- Java - Compact Number Formatting
Java Miscellaneous
- Java - Recursion
- Java - Regular Expressions
- Java - Serialization
- Java - Strings
- Java - Process API Improvements
- Java - Stream API Improvements
- Java - Enhanced @Deprecated Annotation
- Java - CompletableFuture API Improvements
- Java - Array Methods
- Java - Streams
- Java - Datetime Api
- Java 8 - New Features
- Java 9 - New Features
Java APIs & Frameworks
Java Useful Resources
Java Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Answer : A
Explaination
True, Static functions can be accessed via class name or via null reference.
Q 2 - What is the size of boolean variable?
Answer : B
Explaination
The boolean data type can take either true or false, but its "size" isn't precisely defined.
Answer : A
Explaination
Byte variable has default value of 0 if defined as an instance/static variable.
Answer : C
Explaination
Object variable has default value of null if defined as an instance/static variable.
Answer : B
Explaination
It is not mandatory to have a default constructor in a class.
Answer : A
Explaination
Yes, class with private constructor can not instantiated using new keyword.
Q 7 - Method Overloading is an example of
Answer : A
Explaination
Method Overloading is example of static binding.
Q 8 - What is Deserialization?
A - Deserialization is the process of restoring state of an object from a byte stream.
B - Serialization is the process of restoring state of an object from an object.
Answer : A
Explaination
Deserialization is the process of restoring state of an object from a byte stream.
Answer : B
Explaination
It is not necessary that each try block must be followed by a catch block. It should be followed by either a catch block or a finally block.
Q 10 - When finally block gets executed?
A - Always when try block get executed, no matter exception occured or not.
B - Always when a method get executed, no matter exception occured or not.
C - Always when a try block get executed, if exception do not occur.
Answer : A
Explaination
Always when try block get executed, no matter exception occured or not.
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