OOP and Design Patterns Online Test
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The object oriented programming and design patterns online test assesses candidates' knowledge of OOP concepts such as polymorphism, inheritance, abstraction, encapsulation, and design patterns.
It's an ideal test for pre-employment screening. A good software engineer who uses a modern OOP language needs to understand core concepts of the OOP language and how to use design patterns to write reusable solutions that other developers can understand.
This online test requires candidates to answer questions about object oriented programming concepts and design patterns.
Sample public questions
Your team has started to write software for managing a vehicle storehouse using a programming language that supports OOP. This is the class hierarchy you plan to use:
class Vehicle
class Car inherits Vehicle
class Bicycle inherits Vehicle
class MountainBike inherits Bicycle
class Downhill inherits MountainBike
Objects of which type can be assigned to a variable of type Bicycle?
In a language that supports the OOP paradigm, we have the following code that serializes the content of a shopping cart to JSON format:
class ShoppingCart
private content : Dictionary<Int, String>
public function serialize() : String
return new JsonSerializer().serialize(content.clone())
end function
end class
class JsonSerializer
public function serialize(value : Dictionary<Int, String>) : String
// Code that serializes dictionary to JSON format and returns it as string
end function
end class
A client wants to allow loosely coupled plugins to be able to serialize the shopping cart content to their own formats (e.g., XML). Select lines of code that, together, would extend the code above to allow this.
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6 more premium OOP and Design Patterns questions
Panel System, Engine, UML Diagrams, Welcome Screen, Advertising Platform, Mock Configuration.
Skills and topics tested
- OOP & Design Patterns
- Behavioral Patterns
- Creational Patterns
- Design Patterns
- Inheritance
- Method Overriding
- UML
- Inversion of Control
For job roles
- Back-End Developer
- Full-Stack Developer
- Mobile Developer
- Software Developer
- Web Developer
Sample candidate report
What others say
Simple, straight-forward technical testing
TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.
Jan Opperman, Grindrod Bank
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