
OOP Concepts in Java_Revision
Authored by Sridhar Udayakumar
Information Technology (IT)
Professional Development
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is a class in object-oriented programming?
A class is a collection of data without methods.
A class is a blueprint for creating objects that defines properties and methods.
A class is a function that executes code.
A class is a type of variable in programming.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is an example of an object?
A table
A chair
A car
A computer
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the purpose of a constructor in a class?
The purpose of a constructor in a class is to initialize objects.
To create static variables in a class.
To delete objects from memory.
To define methods in a class.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How do you clone an object in Java?
Use the copy constructor method.
Implement the Cloneable interface and use the clone() method.
Call the Object.copy() method.
Serialize the object to a file.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What method is used to create a copy of an object?
replicate function
copy constructor
duplicate method
clone or copy method
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is single inheritance?
Single inheritance is when a class inherits from one and only one parent class.
Single inheritance allows multiple parent classes.
Single inheritance is when a class inherits from no parent class.
Single inheritance is a feature of functional programming only.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is multiple inheritance?
Single inheritance from one parent class
Inheritance that allows classes to share methods only
Multiple inheritance is when a class can inherit from multiple parent classes.
A method of combining multiple classes into one
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