Object-Oriented Programming Lecture: Class Members Quiz

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Where are member variables defined in a class?

As parameters (arguments)

As class variables (static fields) (correct)

As local variables

Inside methods

Which type of method is declared as non-static in a class?

Local method

Class method

Static method

Instance method (correct)

What happens to member variables that are declared but not initialized?

They are automatically assigned a null value

They remain uninitialized

They cause a compilation error

They are set to a default value by the compiler (correct)

What is the default value for an uninitialized long data type variable?

0L Signup and view all the answers

Where are static members (variables and methods) of a class defined?

As class variables and static methods Signup and view all the answers

Which type of variable is used to store the state of an object in a class?

Instance variable (non-static field) Signup and view all the answers

What happens if you attempt to compile and run method m in class Test?

Compilation fails Signup and view all the answers

How are instance variables of an object accessed from another class?

:objectName.variableName Signup and view all the answers

Which of the following correctly accesses instance methods from another class?

:objectName.methodName(argument) Signup and view all the answers

In the given example, what will be the output of c1.area after calling c1.setArea()?

50.24 Signup and view all the answers

In the BankAccount class, what happens when you call the withdraw method?

Decreases the account balance by the specified amount Signup and view all the answers

What is the purpose of the 'this' keyword in Java?

To refer to the current instance of the class Signup and view all the answers

What is the result of attempting to run method m2 in class A?

: No output is printed Signup and view all the answers

What happens if you attempt to access an uninitialized instance variable in Java?

: It results in a compile-time error Signup and view all the answers

What is the role of 'this' in the BankAccount class constructor?

: To initialize instance variables Signup and view all the answers

In Java, how are instance variables in instance methods related to the calling object?

They are always prefixed with 'this.' and relate to the calling object Signup and view all the answers

Object-Oriented Programming Lecture: Class Members Quiz

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