COMPUTER MCQ

What will be given as referring instance variable or invoking method with null reference?

Which of the following cannot be used legally?

What is the default initial value of reference variable which does not refer to any object?

Which operator is not needed to use when the instance variables are referred within the methods of the same class?

What is the associativity of dot operator?

From where and to which end does the associativity of dot operator move to?

How can we invoke display () method of Room r1?

How can we refer to length of Room r1 in a program?

By which of the following operator are instance variables and instance methods accessed?

By which of the following are Instance variables and Instance methods accessed?

Which of the following has its own set of data?

Which of the following is an allocated memory in data structure called heap?

Which of the following is done by ‘new’ keyword?

Which instance method has been defined in a class named Room in the textbook?

Which instance variables have been defined in a class named Room in the textbook?

What is known as to ask the object to perform some task in Java?

Which is the method that can be invoked using the objects to access or modify the instance variable?

By using which of the following ‘methods’ can be invoked?

Where can methods be defined in Java?

Which of the following stores its own value for the attributes?

What does the class define?

What do instance variables define?

Which variables stay throughout the life of the object?

Which variables are created at the time of creating an object?

Each instance of a class can hold different values for its attributes in variables declared in a class What such variables are referred as?

Which type of values can each instance of a class hold?

Which type of values can each instance of a class hold for its attributes in the variable declared in a class?

Which terms are often interchangeably used in OOP language?

Which of the following is a concrete representation of an object?

Which of the following is an abstract representation of an object?

For what does an actual instance of a class stands as another word?

What is said to be as an object that belongs to class?

What is created to store the data for the object by allocating memory?

What is known as the process of creating an object in object oriented programming language?

What is the full form of OOP?

Which type of object does the garbage collector find?

Which of the following looks for unused objects and reclaims the memory?

Which type of memory spaces are allocated to different objects to keep their data value in Java?

Which of the following has its own set of data?

Inside which of the following is the actual data not contained?

Inside which of the following is the actual data contained?

Which of the following determines only the types of the variable?

Which statement can be written by combining statement Room r1; and r1 new Room0?

Which of the following statements states that object is not stored in variable rl, but variable ri1 contains the only address of an object?

What do the parentheses with arguments determine while creating an object?

What is called by some empty parentheses without arguments?

Which of the following is a statement to create an object of type Room and assign its address to variable r1?

Which special method is executed to perform initial task when an object is created in addition to allocating memory?

What is kept in heap?

What is called a special portion of memory where the objects live?