Pattern Design Structural Design Patterns 1

Question 1

The Adapter pattern is used to:

Accepted Answer

Make incompatible interfaces work together

Answer

The Adapter pattern converts the interface of a class into another interface that clients expect, enabling collaboration between incompatible classes.

Question 2

The Decorator pattern differs from inheritance because it:

Accepted Answer

Adds behavior dynamically at runtime

Answer

Decorator wraps objects at runtime to add new behaviors without altering the original class or creating large inheritance hierarchies.

Question 3

Which structural pattern provides a single simplified interface to a complex subsystem?

Accepted Answer

Facade

Answer

The Facade pattern defines a higher-level interface that makes a subsystem easier to use by hiding its internal complexity.

Question 4

The Composite pattern is most useful for representing:

Accepted Answer

Tree-structured hierarchies of objects

Answer

Composite allows individual objects and compositions of objects to be treated uniformly, making it ideal for tree structures like file systems or UI components.

Question 5

In the Bridge pattern, abstraction and implementation are separated to allow them to:

Accepted Answer

Vary independently of each other

Answer

Bridge decouples an abstraction from its implementation so that both can be changed independently without affecting each other.

Pattern Design Practice Test

Pattern Design Practice Test

Pattern Design Structural Design Patterns 1