Pattern Design Structural Design Patterns

Question 1

The Adapter pattern is used to:

Accepted Answer

Make incompatible interfaces work together

Answer

Add responsibilities to an object dynamically

Answer

Provide a simplified interface to a complex subsystem

Answer

Share common state between many objects

Question 2

The Decorator pattern differs from inheritance because it:

Accepted Answer

Adds behavior dynamically at runtime

Answer

Creates a new subclass for each feature

Answer

Modifies the original class

Answer

Uses multiple inheritance

Question 3

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

Accepted Answer

Facade

Answer

Adapter

Answer

Proxy

Answer

Bridge

Question 4

The Composite pattern is most useful for representing:

Accepted Answer

Tree-structured hierarchies of objects

Answer

A simplified view of a complex system

Answer

State-based transitions

Answer

Objects with shared intrinsic state

Question 5

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

Accepted Answer

Vary independently of each other

Answer

Share the same interface

Answer

Be instantiated as singletons

Answer

Be composed in a tree structure

Question 6

The Flyweight pattern reduces memory usage by:

Accepted Answer

Sharing common intrinsic state between multiple objects

Answer

Deferring object creation to subclasses

Answer

Wrapping objects with new behavior

Answer

Providing a surrogate for another object