EDUCBA

EDUCBA

MENUMENU
  • Free Tutorials
  • Free Courses
  • Certification Courses
  • 600+ Courses All in One Bundle
  • Login
Home Software Development Software Development Tutorials Top Interview Question Inheritance Interview Questions
Secondary Sidebar
Top Interview Question Tutorial
  • Interview Questions
    • Apache PIG Interview Questions
    • Elasticsearch Interview Questions
    • Data Engineer Interview Questions
    • Algorithm Interview Questions
    • OBIEE Interview Question
    • SSIS Interview Questions
    • Cognos Interview Questions
    • MapReduce Interview Questions
    • NoSQL Interview Questions
    • SharePoint Interview Questions
    • Sqoop Interview Questions
    • Business Intelligence Interview Questions
    • Mainframe Interview Questions
    • Rail Interview Questions
    • SSRS Interview Questions
    • Data Modeling Interview Questions
    • J2EE Interview Questions
    • Minitab Interview Questions
    • Statistics Interview Questions
    • MS SQL Interview Questions
    • Ab Initio Interview Questions
    • Spark Interview Questions
    • WordPress Interview Questions
    • OS Interview Questions
    • Drupal Interview Questions
    • OOP Interview Questions
    • Mulesoft Interview Questions
    • Typescript Interview Questions
    • Redux Interview Questions
    • Pig Interview Questions
    • ES6 Interview Questions
    • Multithreading Interview Questions
    • Go Interview Questions
    • APEX Interview Questions
    • Teradata Interview Questions
    • Groovy Interview Questions
    • ExtJS Interview Questions
    • E-Commerce Interview Questions
    • Appium Interview Questions
    • SOA Interview Questions
    • ITIL Interview Questions
    • Digital Electronics Interview Questions
    • IT Interview Questions
    • WinForms Interview Questions
    • IT Security Interview Questions
    • WCF Interview Questions
    • Microprocessor Interview Questions
    • Apache Interview Questions
    • MicroStrategy Interview Questions
    • Virtualization Interview Questions
    • UI Developer Interview Questions
    • Electrical Engineering Interview Questions
    • RMAN Interview Questions
    • SVN Interview Questions
    • Talend interview questions
    • SAP ABAP Interview Questions
    • Inheritance Interview Questions
    • Threading Interview Questions
    • Quality Control Interview Questions
    • Embedded System Interview Questions
    • OpenStack Interview Questions
    • Objective C Interview Questions
    • QA Interview Question
    • PLC Interview Questions
    • SDET Interview Questions
    • JCL Interview Questions
    • SOAP Interview Questions
    • IELTS Interview Questions
    • SoapUI Interview Questions
    • Front end Developer Interview Questions
    • DB2 Interview Questions
    • VSAM Interview Question
    • MVC Interview Questions
    • WPF Interview Questions
    • Java Collections Interview Questions
    • UI Designer Interview Questions
    • NLP Interview Questions
    • TFS Interview Questions
    • Active Directory Interview Questions
    • Xamarin Interview Questions
    • Intrusion Prevention System Interview Questions
    • COBOL Interview Questions
    • Control System Interview Questions
    • Blue Prism Interview Questions
    • Scenario Interview Questions
    • Unit testing interview questions
    • Linked List Interview Questions
    • Mainframe testing interview questions
    • Selenium Interview Questions
    • Binary Tree Interview Questions
    • Cloud Security Interview Questions
    • Functional Testing Interview Questions
    • Civil Engineering Questions for Interview
    • DHCP interview questions
    • Spring Batch Interview Questions
    • Perl interview questions
    • ESL interview questions
    • OBIEE Interview Questions
    • DynamoDB interview questions
    • Automation Anywhere Interview Questions
    • Scrum Interview Questions
    • Security Testing Interview Questions
    • Struts Interview Questions
    • Databricks Interview Questions
    • Electronics Engineering Interview Questions
    • Java concurrency interview questions
    • RxJava Interview Questions
    • ServiceNow Interview Question
    • XML Interview Questions
    • Entity Framework Interview Questions
    • Terraform Interview Questions
    • LINQ Interview Questions
    • MVVM Interview Questions
    • OSPF Interview Questions
    • Server interview questions
    • Appdynamics Interview Questions
    • Webpack Interview Questions
    • Data Architect Interview Questions
    • GitHub Interview Questions
    • Data Analyst Technical Interview Questions
    • GitHub JavaScript Interview Questions
    • Bitbucket Interview Questions
    • OOPs Java Interview Questions
    • DNS Interview Question
    • MPLS Interview Questions
    • Django Interview Question

Inheritance Interview Questions

By Priya PedamkarPriya Pedamkar

Inheritance-Interview-Questions

Introduction to Inheritance Interview Questions and Answers

Inheritance is a very popular and a common word for all the techies who belong from a development background.  This is among the core features of the object-oriented programming paradigm popularly known as OOPs. Many programming languages such as Java, C++, Lisp, Perl, Python, Scala, etc. support inheritance in some way or the other.

The core fundamental idea behind inheritance is the use of classes and objects that acquires other entities’ similar properties, thereby reducing the additional effort of reprogramming and rebuilding that piece of code. This helps in keeping the class file short, precise, crisp and of a comparatively lower cost with respect to space-time complexity. Here, in this article, we will present a list of inheritance interview questions for you.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

If you are looking for a job related to Inheritance, you need to prepare for the 2023 Inheritance Interview Questions. Every interview is indeed different as per the different job profiles. Here, we have prepared the important Inheritance Interview Questions and Answers, which will help you succeed in your interview.

In this 2023 Inheritance Interview Questions article, we shall present the 10 most important and frequently asked Inheritance interview questions. These questions are divided into two parts are as follows:

Part 1 – Inheritance Interview Questions (Basic)

This first part covers basic Inheritance Interview Questions and Answers.

Q1. What are the different other OOPs techniques apart from inheritance? Why are multiple inheritances not supported by the Java language?

Answer:
Different Object-Oriented Programming techniques are Abstraction, Encapsulation, and Polymorphism. Java supports many other features but not multiple inheritances because it would create ambiguity and bring a lot of confusion and chaos. Let’s give you more insight into it by making use of an example.
Suppose we have created two classes, A and B, with the same method name: hello(), and we have also created another class, C, which is extending/inheriting the characteristics and the properties of the classes of A, B. Now, the java compiler will not understand the hello() method, which is extended by the class C is the result of which class, which calls for ambiguity.

Q2. Why can’t you inherit a constructor?

Answer:
When we say that we can’t inherit a constructor, a subclass instance cannot be created by using any of the superclass constructors. You cannot do this because you do not want a superclass constructor’s properties to be overridden. This would have been possible if the inheritance was in the picture, but it is not because doing that would conflict with another concept known as Encapsulation.

 Q3. Explain the differences between inheritance and composition.

Answer: 
The difference between inheritance and composition are as below:

S.No.

Inheritance

Composition

1.

The IS-A relationship defines it. The HAS-A relationship defines it.

2.

The base class carries a derived object definition and therefore is tightly bound. The composing object holds an external link to the composing classes, and therefore composition is loosely bound.

3.

Runtime polymorphism Dependency Injection

4.

Unit classes can only inherit single classes. Unit class components can be composed with more than one class at a time.

5.

Relationship among classes Relationship among objects

Q4. Explain the usage of inheritance.

Answer:
These are the basic Inheritance Interview Questions asked in an interview. Classes are extended, whereas interfaces are implemented in case of inheritance; there is a slight variation in the above definition. An interface extends an interface, and a class implements an interface in case of inheritance. The class/interface, which is the derivative one, is also known as the subclass or child class or base class, and the parent class is also known as the superclass, which provides its properties to the class extending it.

Q5. Can multiple interfaces be implemented? Can multiple interfaces be extended by a single interface?

Answer:
Yes, that is possible. For example, properties such as Serializable and Comparability can coexist in a class and therefore, this feature can also promote the use of polymorphism. Yes, a single interface is capable of extending multiple interfaces. To cite an example, the interface java.util.The list extends both the Iterable and Collection interface.

Part 2 – Inheritance Interview Questions (Advanced)

Let us now have a look at the advanced Interview Questions.

Q6. Why cannot private methods be overridden?

Answer:
The subclass did not inherit a private method’s properties, and therefore it cannot be overridden. Moreover, this kind of method is invisible to all the entities operating outside the class, and the call to it is taken care at the compile time itself by making use of Type.

Q7. In the context of inheritance, java.lang. The object class is one major class with which all other java classes are inherited. Comment on the inheritance for interfaces. Are Object classes responsible for their inheritance?

Answer:
No, in the case of java, only object classes are responsible for providing an inheritance to classes and interfaces are exempted. On the contrary, the classes which are responsible for implementing interfaces have their root level of inheritance from Object classes.

Q8. Can the subclass inherit static members?

Answer:
No, an inheritance of static members is not possible, but the subclass and the superclass can both consist of the static method with a common signature. The subclass will have consisted of the properties of the static member of the superclass.

Q9. Explain the different types of inheritance.

Answer:
These are the popular Inheritance Interview Questions asked in an interview. Different kinds of inheritance are:

  1. Single Inheritance: In this kind of inheritance, a single class’s properties are extended by other single classes.
  2. Hierarchical Inheritance: In this kind of inheritance, multiple classes extend a single class.
  3. Multilevel Inheritance: In the case of multilevel inheritance, a class is inherited by a class which again is inherited by another class, thereby forming a multilevel chaining mechanism of inheritances.
  4. Multiple Inheritance (Not supported for classes in Java): A single class extends multiple classes, and therefore it can be said to have the above inheritance’s combination. This can be achieved by making use of interfaces.
  5. Hybrid Inheritance: (Not supported for classes in Java): It is essentially a combination of multilevel inheritance and multiple inheritances where a single class is derived from more than one class, and the parent class is supposedly a derived class and not a base class.

Q10. Is it possible to downgrade the visibility of an overridden or an inherited method?

Answer:
No, reducing visibility is not possible.

Conclusion

In this post, we read about inheritance interview questions. These questions are targeted to give you a fair idea about the concepts of inheritance. There are other underlying features of object-oriented programming language which the interviewer could ask. Apart from just concepts, you should also prepare to solve any code outputs and debug inheritance related questions. I hope you liked this article. Keep following us for plenty of other good articles about various technology.

Recommended Article

This has been a guide to the list Of Inheritance Interview Questions and Answers so that the candidate can crackdown these Interview Questions easily. Here in this post, we have studied top Inheritance Interview Questions, which are often asked in interviews. You may also look at the following articles to learn more –

  1. Hibernate Interview Questions
  2. PLSQL Interview Questions
  3. JIRA Interview Questions
Popular Course in this category
All in One Software Development Bundle (600+ Courses, 50+ projects)
  600+ Online Courses |  3000+ Hours |  Verifiable Certificates |  Lifetime Access
4.6
Price

View Course

Related Courses

Programming Languages Training (41 Courses, 13+ Projects, 4 Quizzes)4.9
C Programming Training (3 Courses, 5 Project)4.8
Selenium Automation Testing Training (11 Courses, 4+ Projects, 4 Quizzes)4.7
Primary Sidebar
Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Live Classes
  • Corporate Training
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Java Tutorials
  • Python Tutorials
  • All Tutorials
Certification Courses
  • All Courses
  • Software Development Course - All in One Bundle
  • Become a Python Developer
  • Java Course
  • Become a Selenium Automation Tester
  • Become an IoT Developer
  • ASP.NET Course
  • VB.NET Course
  • PHP Course

ISO 10004:2018 & ISO 9001:2015 Certified

© 2023 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

EDUCBA
Free Software Development Course

Web development, programming languages, Software testing & others

By continuing above step, you agree to our Terms of Use and Privacy Policy.
*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you

Let’s Get Started

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA Login

Forgot Password?

By signing up, you agree to our Terms of Use and Privacy Policy.

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

Loading . . .
Quiz
Question:

Answer:

Quiz Result
Total QuestionsCorrect AnswersWrong AnswersPercentage

Explore 1000+ varieties of Mock tests View more