Flashcards on Java Basics

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What is Java?

Java is a high-level programming language used to develop software applications.

What is the main characteristic of Java programming language?

Java is platform-independent, which means the same code can run on different operating systems.

What is the JDK?

JDK stands for Java Development Kit. It is a software development environment used to develop Java applications and applets.

What is a variable in Java?

A variable is a container that holds a value, which can be changed during program execution. In Java, variables are declared with a specific data type.

What are the primitive data types in Java?

The primitive data types in Java are byte, short, int, long, float, double, boolean, and char.

What is an if statement in Java?

An if statement is a conditional statement that executes a block of code if a certain condition is true.

What is a loop in Java?

A loop is a control flow statement that allows repeated execution of a block of code.

What is object-oriented programming (OOP)?

Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, which can contain data and code.

What is a class in Java?

A class is a blueprint for creating objects. It defines the properties and methods that an object of the class can have.

What is inheritance in Java?

Inheritance is a mechanism in which one class acquires the properties and methods of another class. It promotes code reusability and enables the creation of a hierarchy of classes.

What is a constructor in Java?

A constructor is a special method that is used to initialize an object. It is called automatically when an object of a class is created.

What is method overriding in Java?

Method overriding is a feature in Java that allows a subclass to provide an implementation of a method that is already defined in its superclass.

What is an array in Java?

An array is a data structure that stores a fixed-size sequential collection of elements of the same type.

What is exception handling in Java?

Exception handling is a mechanism to handle runtime errors or exceptions that occur during program execution.

What is the syntax for a for loop in Java?

The syntax for a for loop in Java is: for (initialization; condition; iteration) { // code to be executed }

What is Java?

Java is a high-level programming language used to develop software applications.

What is the main characteristic of Java programming language?

Java is platform-independent, which means the same code can run on different operating systems.

What is the JDK?

JDK stands for Java Development Kit. It is a software development environment used to develop Java applications and applets.

What is a variable in Java?

A variable is a container that holds a value, which can be changed during program execution. In Java, variables are declared with a specific data type.

What are the primitive data types in Java?

The primitive data types in Java are byte, short, int, long, float, double, boolean, and char.

What is an if statement in Java?

An if statement is a conditional statement that executes a block of code if a certain condition is true.

What is a loop in Java?

A loop is a control flow statement that allows repeated execution of a block of code.

What is object-oriented programming (OOP)?

Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, which can contain data and code.

What is a class in Java?

A class is a blueprint for creating objects. It defines the properties and methods that an object of the class can have.

What is inheritance in Java?

Inheritance is a mechanism in which one class acquires the properties and methods of another class. It promotes code reusability and enables the creation of a hierarchy of classes.

What is a constructor in Java?

A constructor is a special method that is used to initialize an object. It is called automatically when an object of a class is created.

What is method overriding in Java?

Method overriding is a feature in Java that allows a subclass to provide an implementation of a method that is already defined in its superclass.

What is an array in Java?

An array is a data structure that stores a fixed-size sequential collection of elements of the same type.

What is exception handling in Java?

Exception handling is a mechanism to handle runtime errors or exceptions that occur during program execution.

What is the syntax for a for loop in Java?

The syntax for a for loop in Java is: for (initialization; condition; iteration) { // code to be executed }

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