Software Engineering Software Design Patterns 2

Question 1

Which pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable?

Accepted Answer

Strategy

Answer

The Strategy pattern lets the algorithm vary independently from the clients that use it.

Question 2

The Composite pattern is most useful when you need to treat individual objects and compositions of objects:

Accepted Answer

Uniformly

Answer

The Composite pattern lets clients treat individual objects and compositions uniformly through a common interface.

Question 3

Which pattern separates the construction of a complex object from its representation?

Accepted Answer

Builder

Answer

The Builder pattern constructs a complex object step by step and allows the same construction process to create different representations.

Question 4

Which behavioral pattern encapsulates a request as an object, allowing parameterization and queuing?

Accepted Answer

Command

Answer

The Command pattern encapsulates actions as objects, enabling undo/redo, logging, and queued requests.

Question 5

What is the primary intent of the Proxy design pattern?

Accepted Answer

Control access to another object

Answer

The Proxy pattern provides a surrogate or placeholder for another object to control access to it.

Software Engineering Practice Test