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Java OOP Concepts
for Your Next
Interview
www.fusion-institute.com
Fusion Software Institute
What is OOP?
Object-Oriented Programming (OOP) is . It
organizes code by combining data (attributes)
and the methods (functions) that operate on
that data into objects.
Object-oriented programming (OOP) is a
computer programming model that organizes
software design around data, or objects, rather
than functions and logic. An object can be
defined as a data field that has unique
attributes and behavior.
Four Pillars of OOPS
Encapsulation:
Bundling data and methods within an object, protecting data
from outside interference.
Inheritance:
Allows a class to inherit properties and methods from
another class, promoting code reuse and establishing hierarchical
relationships.
Polymorphism:
The ability of objects to take on many forms, allowing
different objects to respond to the same method call in their own way.
Abstraction:
Simplifying complex systems by modeling essential properties
and behaviors while hiding unnecessary details.
Common Interview
Questions
Define each OOP pillar with examples
Difference between abstraction & encapsulation
Runtime vs compile-time polymorphism
Why method overriding?
Access specifiers & inheritance effects
Constructor vs destructor
Final/static/abstract method distinctions
Kick-start your developer
career today
Join Fusion Software Institute and master Java Development with
hands-on training, expert mentorship, and real-world projects.
💼Get placed with a starting package of ₹4 LPA!
📞Call us: +91 7498992609 | +91 9503397273
📧Email: enquiry@fusion-institute.com
Your tech career begins here—enroll now!

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Unlock Java Interview Success: OOP Concepts Every Candidate Must Know

  • 1. Java OOP Concepts for Your Next Interview www.fusion-institute.com Fusion Software Institute
  • 2. What is OOP? Object-Oriented Programming (OOP) is . It organizes code by combining data (attributes) and the methods (functions) that operate on that data into objects. Object-oriented programming (OOP) is a computer programming model that organizes software design around data, or objects, rather than functions and logic. An object can be defined as a data field that has unique attributes and behavior.
  • 3. Four Pillars of OOPS Encapsulation: Bundling data and methods within an object, protecting data from outside interference. Inheritance: Allows a class to inherit properties and methods from another class, promoting code reuse and establishing hierarchical relationships. Polymorphism: The ability of objects to take on many forms, allowing different objects to respond to the same method call in their own way. Abstraction: Simplifying complex systems by modeling essential properties and behaviors while hiding unnecessary details.
  • 4. Common Interview Questions Define each OOP pillar with examples Difference between abstraction & encapsulation Runtime vs compile-time polymorphism Why method overriding? Access specifiers & inheritance effects Constructor vs destructor Final/static/abstract method distinctions
  • 5. Kick-start your developer career today Join Fusion Software Institute and master Java Development with hands-on training, expert mentorship, and real-world projects. 💼Get placed with a starting package of ₹4 LPA! 📞Call us: +91 7498992609 | +91 9503397273 📧Email: [email protected] Your tech career begins here—enroll now!