QUESTION: 21

When would you use classes and when would you use namespaces?

Use classes to encapsulate code and represent objects, and namespaces to avoid symbol name collisions
Use classes for performance-sensitive code, and namespaces when readability matters more
Use namespaces for performance-sensitive code, and classes when readability matters more
Always use them; namespaces are always superior to classes

Answer(s): A

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QUESTION: 22

Which of these elements can be encapsulated by namespaces and made accessible from the outside?

Only classes
Classes, functions and constants
Classes, functions, constants and variables

Answer(s): B

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You'd like to use the class MyDBConnection that's defined in the MyGreatFramework\MyGreatDatabaseAbstractionLayer namespace, but you want to minimize *as much as possible* the length of the class name you have to type. What would you do?

Import the MyGreatFramework namespace
Import the MyGreatFramework\MyGreatDatabaseAbstractionLayer namespace
Alias MyGreatFramework\MyGreatDatabaseAbstractionLayer\MyDBConnection to a shorter name
Alias MyGreatFramework\MyGreatDatabaseAbstractionLayer to a shorter name

Answer(s): C

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