Design Patterns: Test Your Knowledge

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Beginner Level

What is the primary purpose of Creational Design Patterns? *

1 point

Defining object interactions

Managing object composition

Dealing with object creation mechanisms

Controlling access to objects

Which Creational Design Pattern ensures that a class has only one instance?
*

1 point

Singleton

Factory

Abstract Factory

Builder

In which scenario would you typically use the Factory pattern?
*

1 point

To ensure a class has only one instance

To create objects with multiple variations

To adapt an interface to make it compatible with another

To define the structure of a complex object

Which Creational Design Pattern focuses on building complex objects step by step?
*

1 point

Singleton

Factory

Abstract Factory

Builder

When might you use the Abstract Factory pattern?
*

1 point

When you want to ensure a class has only one instance

When you need to create objects with multiple variations

When you want to create families of related objects without specifying their concrete classes

When you need to adapt an interface to make it compatible with another

What is the primary purpose of Structural Design Patterns?
*

1 point

Dealing with object creation mechanisms

Managing object composition

Defining object interactions

Controlling access to objects

Which Structural Design Pattern is used to adapt an interface to make it compatible with another?
*

1 point

Adapter

Decorator

Proxy

Observer

In which scenario would you typically use the Proxy pattern?
*

1 point

To adapt an interface to make it compatible with another

To create objects with multiple variations

To control access to an object and add extra functionality

To ensure that a class has only one instance

Which Behavioral Design Pattern defines a publish-subscribe mechanism for notifying multiple objects of state changes?
*

1 point

Proxy

Observer

Factory

Adapter

In which scenario might you use the Dependency Injection (DI) pattern?
*

1 point

To adapt an interface to make it compatible with another

To separate concerns into Model, View, and Controller

To establish a one-to-many relationship between objects

To inject dependencies from external sources to promote loose coupling

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