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Java Quiz Overview

Who is this quiz for
For Java developers who already have some knowledge of the programming language, from juniors to seniors. Courses and quizzes are made with intent to test knowledge and find some gaps in already learned materials.

About this Quiz

Java is an object-oriented cross-platform programming language that is designed for readability and interoperability. It is a programming language that was created for usage in distributed environment of Internet to implement an object-oriented programming model. Java is usually read as a light and easier version of how to look and feel C++ language. However, Java can be used as a complete version to create outright applications that can run on all platforms that support Java without the need for recompilation. In 2017 Java is the most popular programming language, with more than 9 million developers who work with it.
This Quiz is entirely dedicated to Java language, where you can test your knowledge and answer interview questions on Java. You will answer theoretical and practical questions that test your skills to understand java code and find mistakes.

You can return to this java course whenever you like since we make updates every time with new papers, rules, and even new questions!

Java Chapters

Main method, declaring variables
Integers and doubles
Operators
Primitive type conversions
This chapter contains questions on primitive types explicit and implicit casts and results of operations applied to them
Strings, formatting output
If else, switch and loops
Arrays
Initialization of classes and fields
Methods declarations and execution
Declaring classes with methods, fields, parameters and constructors
Equals and Object's methods
Inheritance and polymorphism
Interfaces, Abstract classes, Enums
Also Inner classes Nested classes and Anonymous classes
Exceptions, try-catch-finally
Object Initialization, Object Reference
Public, private, protected, packages
Immutable objects, final keyword
Generics
Lists
Maps and sets
Threads, concurrency
Thread class, multithreading and concurrency in Java
Java specifications, JVM
Input/Output, Files, Design Patterns
Gang of Four (GOF) design patterns questions

Java Discussions

что здесь происходит вообще?

Dec 13, 7:38:16 PM Java

\u0031=1 https://www.techonthenet.com/unicode/chart.php

Dec 13, 7:04:44 PM Java

\u0031 = 1https://www.techonthenet.com/unicode/chart.php

Dec 13, 7:04:10 PM Java

formatter.format("%.2E\n", 100.0/3.0); //why 3.33 ???

Apr 20, 5:29:58 PM Java

Java Snippets

Java

Break statement
Java

Garbage collection

Java Papers

Java

Java Enum Types
The article considers the implementation of Java enum types, starting from the API and ending with examples of the usage of inheritance in enums. The article is recommended reading for all java-programmers, regardless of experience.
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Java

Regular expressions
The article information is constructed in such a way, that everybody will understand how to use them, even those who knows nothing about regular expressions.
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Java

Inner classes in Java
In Java nested class - a class that is declared within another class declaration. Nested classes are divided into static and non-static . Strictly non-static nested classes have another name - inner classes.
Read more >
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