1
___ is the superclass to all Java classes either user-defined or built-in.
Correct Answer
Object
☑ MCQ PRACTICE
Object Oriented Programming through Java Unit 2
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Object Oriented Programming through Java - Unit-2
2
Java language doesn't supports ___ type of inheritance.
Correct Answer
Multiple Inheritance
3
which access modifier data members will be accessible Inside the package only.
Correct Answer
default
4
which access modifier data members will be accessible Inside the package and outside the package through sub classes.
Correct Answer
protected
5
which access modifier data members will be accessible Inside the class only.
Correct Answer
private
6
Which of the method is not supported by scanner class?
Correct Answer
readLine()
7
What is the correct syntax to create to an object for Console class?
Correct Answer
Console c = System.console();
8
Constructor is a special type of method which is used to ______________________?
Correct Answer
All the above
9
Which of the following is not a standard rule to define constructor?
Correct Answer
Constructor must have explict return type
10
The wrapping up of data and functions into a single unit is called
Correct Answer
Encapsulation
11
In object-oriented programming, new classes can be defined by extending existing classes. This is an example of:
Correct Answer
Inheritance
12
What is the maximum number of ELSE-IF statements that can present in between starting IF and ending ELSE statements?
Correct Answer
None
13
The super keyword is used to ____________________.
Correct Answer
access the variables and methods in parent class
14
Which of the following statement is invalid about final keyword?
Correct Answer
The final keyword can be appiled on methods to disallow method overloading
15
The compile time polymorphism performed by _______________________?
Correct Answer
method overloading
16
If a class have multiple methods with same name but different parameters is known as _________________?
Correct Answer
method overloading
17
If a child class has the same method as declared in the parent class is known as _________________?
Correct Answer
method overriding
18
which of the following is not a rule for method overriding?
Correct Answer
Class name and method name must be same.
19
To stop or block inheriting a given class, the ___ keyword is used before the class.
Correct Answer
final
20
An Overridden method is the method of ____ class and the overriding method is the method of ___ class.
Correct Answer
super, sub
21
___________ binding will be performed at runtime when we override the methods.
Correct Answer
Dynamic
22
If you import "packagename.classname" then ___________ of this package will be accessible.
Correct Answer
only specified class
Fill in the Blanks
23
An abstract class can have abstract and non abstract methods. (True / False)
Correct Answer
True
24
In a Multi Level Inheritance Class-C inherits from Class-B and Class-B inherits from Class-State TRUE or FALSE.
Correct Answer
TRUE
25
If you use "packagename.*" then all the classes and interfaces of this package and subpackages will be accessible.
Correct Answer
False