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, multiple inheritance is allowed

Yes, but it will generate warnings

Yes, but it will generate warnings

It depends on the system running it

It depends on the system running it

No, Java doesn't support multiple inheritance

No, Java doesn't support multiple inheritance

Good Job!

Oops!

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

Please login to submit your explanation

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

prepinstaplacement

prepinsta

prepinsta

Compilation error

Compilation error

Runtime error

Runtime error

Good Job!

Oops!

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

Please login to submit your explanation

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

Encapsulation

Interface

Interface

Composition

Composition

Inheritance

Inheritance

Aggregation

Aggregation

Good Job!

Oops!

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

Please login to submit your explanation

Question 4

Time: 00:00:00
What is the name of the class that is the ancestor to every other class in Java?

object

object

class

class

Root

Root

java

java

Good Job!

Oops!

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

Please login to submit your explanation

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

true

false

false

prepinsta

prepinsta

null

null

Good Job!

Oops!

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

Please login to submit your explanation

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

sub, super

super, super

super, super

super, sub

super, sub

sub, sub

sub, sub

Good Job!

Oops!

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

Please login to submit your explanation

Question 7

Time: 00:00:00
What concepts come under Polymorphism in java?

Method overloading

Method overloading

Constructor overloading

Constructor overloading

Method overriding

Method overriding

All the above

All the above

Good Job!

Oops!

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

Please login to submit your explanation

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

Make use of the parent class’s capabilities

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

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

Override all the methods of its parent class

Override all the methods of its parent class

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

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

Make sure the result “contains” its base class

Make sure the result “contains” its base class

Good Job!

Oops!

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

Please login to submit your explanation

Question 9

Time: 00:00:00
Object-oriented inheritance models the

“is a kind of” relationship

“is a kind of” relationship

“has a” relationship

“has a” relationship

 “want to be” relationship

 “want to be” relationship

inheritance does not describe any kind of relationship between classes

inheritance does not describe any kind of relationship between classes

“contains” of relationship

“contains” of relationship

Good Job!

Oops!

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

Please login to submit your explanation

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 prepinsta

Inside prepinstaplacement

Inside prepinstaplacement

Compilation error

Compilation error

Runtime error

Runtime error

Good Job!

Oops!

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

Please login to submit your explanation

["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

0%

Start Preparing
Detailed performance

Get over 200+ Courses under One Subscription

Get Prime Course List
mute
Limitless Learning

One Subscription access everything

Job Assistance

Get Access to PrepInsta Prime

Top Faculty

from FAANG/IITs/TOP MNC's

Get Prime

Don’t settle Learn from the Best with PrepInsta Prime Subscription

manish-prepinsta

Manish Agarwal

Ex- Accenture

Trained 3.2L+ students

Rushikesh-prepinsta

Rushikesh Konapure

Data Science & Full Stack Mentor

Trained 35k+ students

atulya-prepinsta

Atulya Kaushik

Ex- Google & Instamojo

Trained 3.2L+ students

Aashay-prepinsta

Aashay Mishra

Ex- Sapient

Trained 83k+ students

Janvi-prepinsta

Janvi Jain

Lead Verbal Mentor

Trained 46k+ students

Learn from Top 1%
Get Prime
prepinsta
prepinsta
prepinsta
prepinsta
prepinsta
prepinsta
prepinsta

One Subscription, For Everything

The new cool way of learning and upskilling -

Limitless Learning

One Subscription access everything

Job Assistance

Get Access to PrepInsta Prime

Top Faculty

from FAANG/IITs/TOP MNC's

Get 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
Get Prime Course List

January 20, 2022