Define classes in Java
Answer: A class is a collection of objects of similar data types. Classes are user-defined data types and behave like built-in types of a programming language.
Syntax of a class:
class Sample{
member variables
methods()
}
41.Please explain Local variables and Instance variables in Java.
Answer: Variables that are only accessible to the method or code block in which they are declared are known as local variables. Instance variables, on the other hand, are accessible to all methods in a class. While local variables are declared inside a method or a code block, instance variables are declared inside a class but outside a method. Even when not assigned, instance variables have a value that can be null, 0, 0.0, or false. This isn't the case with local variables that need to be assigned a value, where failing to assign a value will yield an error. Local variables are automatically created when a method is called and destroyed as soon as the method exits. For creating instance variables, the new keyword must be used.
42.What is an Object?
Answer: An instance of a Java class is known as an object. Two important properties of a Java object are behaviour and state. An object is created as soon as the JVM comes across the new keyword.
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