19 interview questions on Object Oriented Programming for developers (2024)

13 votes1475 runs0 comment

Eric Hostaleryat Dec 3, 2021

8 votes491 runs0 comment

design pattern

Elieat Mar 28, 2023

7 votes1353 runs0 comment

Eric Hostaleryat Dec 3, 2021

4 votes1392 runs0 comment

Eric Hostaleryat Dec 3, 2021

3 votes1366 runs0 comment

Eric Hostaleryat Mar 13, 2023

3 votes1346 runs0 comment

Eric Hostaleryat Dec 3, 2021

3 votes1342 runs0 comment

Eric Hostaleryat Dec 3, 2021

3 votes1338 runs1 comment

Eric Hostaleryat Dec 3, 2021

3 votes1303 runs1 comment

2 votes1425 runs0 comment

design pattern

Eric Hostaleryat Sep 19, 2022

2 votes1372 runs0 comment

Eric Hostaleryat Dec 3, 2021

2 votes189 runs0 comment

polymorphism

encapsulation

Monemat Nov 3, 2023

1 vote1374 runs1 comment

Eric Hostaleryat Dec 3, 2021

1 vote1348 runs0 comment

Eric Hostaleryat Dec 3, 2021

1 vote372 runs0 comment

encapsulation

0 vote1352 runs0 comment

Eric Hostaleryat Dec 3, 2021

0 vote1349 runs1 comment

Eric Hostaleryat Dec 3, 2021

0 vote1333 runs2 comments

Eric Hostaleryat Mar 20, 2023

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19 interview questions on Object Oriented Programmingfor developers (2024)

Test your technical skills before an interview of Object Oriented Programming with 19 corrected questions. Beginner, Intermediate or Expert level.

19 interview questions on Object Oriented Programmingfor developers (2024)

Test your technical skills before an interview of Object Oriented Programming with 19 corrected questions. Beginner, Intermediate or Expert level.

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

You need to develop a class for which there should be only one instance throughout your application. Which design pattern should you use for this?

Can we extend an abstract class in Java?

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Implement the interface IEmailFormatter for the classes Person, Company, and ListOfPerson, which has a method GetEmailContent()

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Implement the registration method on class A in a virtual way,Override the registration method on classes A1 and A2 when implementing these classes

Can an interface inherit from another interface?

Which design pattern allows to dynamically add responsibilities to an object?

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Inheritance, polymorphism and encapsulation

What is the default value of a field in a class in Java?

What are the public methods of the class `Person`?

Hiding complexity can be termed as Encapsulation

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

Is the following code valid? class Person { constructor(name, age) { this.name = name; this.age = age; } } const person = new Person('John', 20); console.log(person.name); console.log(person.age);

How to call a method from a parent class in a child class in PHP

Is an interface abstract?