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44 interview questions on Object-oriented programming - Fundamentalsfor developers (2025)

Test your technical skills before an interview of Object-oriented programming - Fundamentals with 44 corrected questions. Beginner, Intermediate or Expert level.

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Easy
10 votes817 runs0 comment

Inheritance in OOP.

IT Architect
OOP
inheritance
methods
Samuelat Mar 28, 2022
Easy
7 votes800 runs0 comment
Medium
5 votes769 runs1 comment

When can you do a+b in OOP ?

IT Architect
OOP
operator overloading
classes
Samuelat Mar 28, 2022
Medium
4 votes657 runs
2 comments

What does the following code return ?

IT Architect
OOP
inheritance
access modifiers
Samuelat Mar 28, 2022
Medium
4 votes631 runs0 comment
Medium
3 votes717 runs2 comments
Medium
3 votes637 runs0 comment

Overloading an operator in OOP

IT Architect
OOP
operators
classes
Samuelat Mar 28, 2022
Medium
2 votes700 runs0 comment
Easy
2 votes649 runs0 comment
Easy
2 votes627 runs0 comment

What does this program print ?

IT Architect
OOP
inheritance
overriding
Samuelat Mar 28, 2022
Easy
1 vote643 runs0 comment
Easy
1 vote206 runs0 comment
Medium
1 vote206 runs0 comment

How to add two vectors in a class Vector2D in OOP

IT Architect
OOP
operator overloading
classes
Samuelat Mar 28, 2022