Class 12

An object is:

In a class Book with data members Title, Author, Publisher and methods display() and getPrice(), the data members are also called:

A special method used to initialize the data members of a class when an object is created is called a:

Which of these statements about a Java constructor is TRUE?

If a class defines only a parameterized constructor, what happens when you try to create an object without arguments, e.g., new Book()?

A constructor that initializes all data members with default values and takes no parameters is called a:

Which keyword is used to create a new object of a class in Java?

Which operator is used to access data members and method members of an object?

Why do all Java classes have access to methods like hashCode() and wait() even without defining them?

Which access modifier makes a data member or method visible ONLY within its own class?

By default (if no access modifier is specified), what is the visibility of a class member in Java?

A method that returns the value of a private data member is called a:

A method that allows controlled modification of a private data member's value (possibly with validation) is called a:

What is the main benefit of using getter and setter methods instead of allowing direct public access to data members?

Once a data member is declared private, it can still be accessed directly from outside the class using the dot operator.

A constructor is called explicitly by the programmer using a special 'construct' statement.

What is the difference between a Class and an Object? Give an example.

Why is a constructor used in a class?

Design a Java class 'Book' with private data members Title, Author, Publisher, Genre (all String) and Price (double). Include a parameterized constructor, a getter and setter for Price (the setter should not allow price below 100), and a display() method.

Which keyword is used to bring a prebuilt Java class into a program for use?