Prepare
- All Platforms
- Programming
- Aptitude
- Syllabus
- Interview Preparation
- Interview Exp.
- Off Campus
- Prime Video
- Prime Mock
PrepInsta Prime
OffCampus
The Job Company
Placement Stats

Prime Video
Prime Mock

⁰

Notifications Mark All Read

7 Day TCS NQT Crash Course is available at just 1999. Click here to Purchase
Login
Get Prime

InfyTQ Menu

What is InfyTQ ?
Placement Papers
Registration Process
Certification Round
- Certification Round Details
- Certification Round Practice Questions
Java
- Java Round
- Java MCQ Practice Questions
Python
- Python Round
- Python MCQ Practice Questions
DBMS
- DBMS Round
- DBMS MCQ Practice Questions
Coding Questions
Advantage Round
Syllabus
Recruitment Process
How to Prepare
InfyTQ Results
Interview Experiences

Get Hiring Updates
Contact us

PrepInsta MockMock
Prime VideoVideo

InfyTQ Polymorphism Quiz 1

Question 1

Time: 00:00:00

Examine the following class declaration? Is this valid?

Public class newclass extends maruti extends car



{



}

Yes, multiple inheritance is allowed

Yes, but it will generate warnings

It depends on the system running it

No, Java doesn't support multiple inheritance

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Java doesn't support multiple inheritance To declare inheritance in Java, we simply add extends superclass.

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 2

Time: 00:00:00

class exam 

{ 

    void myMethod() 

    { 

        System.out.println("prepinstaplacement"); 

    } 

} 

public class Derived extends exam 

{ 

    void myMethod() 

    { 

        System.out.println("prepinsta"); 

    } 

    

    public static void main(String[] args) 

    { 

        Derived obj = new exam(); 

        obj.myMethod(); 

    } 

}

prepinstaplacement

prepinsta

Compilation error

Runtime error

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Compilation error

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 3

Time: 00:00:00

In object-oriented programming, new classes can be defined by extending existing classes. This is an example of:

Encapsulation

Interface

Composition

Inheritance

Aggregation

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Inheritance is a mechanism that enables one class to inherit all of the behaviour (methods ) and attributes (instance variables) of another class. A class that inherits from another class is called a subclass and the class that gives the inheritance is called a superclass.

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 4

Time: 00:00:00

What is the name of the class that is the ancestor to every other class in Java?

object

class

Root

java

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

object of the class that is the ancestor to every other class in Java.

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 5

Time: 00:00:00

Examine the following code:

String str = "prepinsta";



boolean switch = str instanceof String;

What value is placed in the switch?

true

false

prepinsta

null

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

True will be placed instead of switch

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 6

Time: 00:00:00

An Overridden method is the method of ____ class and the overriding method is the method of ___ class.

sub, super

super, super

super, sub

sub, sub

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

explanation= An Overriding method belongs to the Subclass and the Overridden method belongs to the Superclass.

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 7

Time: 00:00:00

What concepts come under Polymorphism in java?

Method overloading

Constructor overloading

Method overriding

All the above

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Method overloading, and constructor overloading come under compile time polymorphism. as the compiler resolves overloaded method at compile time. in simple word, compiler can understand which overloaded method or constructor to call at compile time itself.

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 8

Time: 00:00:00

Which of the following does not belong: If a class inherits from some other class, it should

Make use of the parent class’s capabilities

Over-ride or add the minimum to accomplish the derived class’ purpose

Override all the methods of its parent class

Make sure the result “IS-A-KIND-OF” its base class

Make sure the result “contains” its base class

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

In a class hierarchy, when a method in a subclass has the same method signature as that of the superclass, then the method in the subclass is said to “override” the method in superclass. When an overridden method exists in the subclass, the subclass objects always refer its own. The subclass overridden method hides ( or blocks ) that of the superclass method.

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 9

Time: 00:00:00

Object-oriented inheritance models the

“is a kind of” relationship

“has a” relationship

“want to be” relationship

inheritance does not describe any kind of relationship between classes

“contains” of relationship

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Object-oriented inheritance models the kind of relationship

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

Question 10

Time: 00:00:00

class prepinsta 

{ 

    protected void getData() 

    { 

        System.out.println("Inside prepinsta"); 

    }

} 

class prepinstaplacement extends prepinsta 

{

    protected void getData() 

    { 

        System.out.println("Inside prepinstaplacement"); 

    } 

} 



public class exam 

{ 

    public static void main(String[] args) 

    {

       prepinsta obj = new prepinstaplacement(); 

        obj.getData(); 

    } 

}

Inside prepinsta

Inside prepinstaplacement

Compilation error

Runtime error

Good Job!

Oops!

Report the answer

How to use PrepInsta Quiz

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Output will be Inside prepinstaplacement

Please login to submit your explanation

You can check your performance of this question after Login/SignupLogin

Start

["0","40","60","80","100"]

["Need more practice!","Keep trying!","Not bad!","Good work!","Perfect!"]

Please login to report

Personalized Analytics only Availble for Logged in users

Analytics below shows your performance in various Mocks on PrepInsta

Your average Analytics for this Quiz

Rank

Percentile

Start Preparing

Detailed performance

Completed

0/10

Accuracy

Related Banners

Prepinsta Prime

Get Prepinsta Prime

Get all 200+ courses offered by Prepinsta

Explore Prime or check Course List

Check out our instagram

Never Miss an OffCampus Update

Get OffCampus Updates on Social Media from PrepInsta

Instagram

Get Hiring Updates

Amazon,Google,Delottie & 30+companies are hiring ! Get hiring Updates right in your inbox from PrepInsta

PrepInsta Prime

Get over 200+ course One Subscription

Courses like AI/ML, Cloud Computing, Ethical Hacking, C, C++, Java, Python, DSA (All Languages), Competitive Coding (All Languages), TCS, Infosys, Wipro, Amazon, DBMS, SQL and others.

Get Prime Course List

PrepInsta Prime

Get over 200+ course One Subscription

Courses like AI/ML, Cloud Computing, Ethical Hacking, C, C++, Java, Python, DSA (All Languages), Competitive Coding (All Languages), TCS, Infosys, Wipro, Amazon, DBMS, SQL and others.

Get Prime Course List