Design Patterns Quiz

Which among the following is not the part of "How to Use a Design Pattern"

• Read the pattern once through for an overview

• Go back and study the Structure, Participants, and Collaborations sections

• Examine a cause of redesign.

• Look at the Sample Code section to see a concrete example of the pattern in code

• Choose names for pattern participants that are meaningful in the application

A _________________indicates a class that instantiates objects of another class.

• plain arrowhead line

• dashed arrowhead line

• vertical line and a triangle

• dashed bubblehead line

Which among the following is/are false.

• Object composition is an alternative to class inheritance

• Object composition style of reuse is called white-box reuse

• Object composition new functionality is obtained by assembling or composing objects to get more complex functionality.

• Object composition requires that the objects being composed have well-defined interfaces.

Mixin classes require ______________ inheritance to provide an optional interface or functionality to other classes.

• Single

• Multilevel

• Multiple

• Hybrid

The operations that an abstract class declares but doesn't implement are called

• Concrete operations

• Abstract operations

• Declared operations

• Defined operations

Every operation declared by an object specifies the operation's name, the objects it takes as parameters, and the operation's return value. This is known as the operation's

• Instance

• Interface

• Signature

• Pattern

A design pattern used, when a system should be configured with one of multiple families of products is

• Prototype

• Abstract factory

• Factory method

• Builder

A design pattern used, when the construction process must allow different representations for the object that's constructed is

• Prototype

• Abstract factory

• Factory method

• Builder

A design pattern used, when a class need to have only one global instance.

• Prototype

• Abstract factory

• Singleton

• Builder

A design pattern used, to avoid building a class hierarchy of factories that parallels the class hierarchy of products is

• Prototype

• Abstract factory

• Factory method

• Builder