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1. Message Passthrough

Explain why message passthrough might be acceptable for a class which is an aggregation of other classes.

2. Software Reuse

What form of reuse model is described by the following:

An organisation creates a dedicated software development team whose role it is to produce reusable software components, which are then used by other development teams.

3. Cohesion

The following diagram shows a module hierarchy in which the designer has chosen to separate out special modules to handle interaction with a file (file-handler module) and the user (screen-handler module).  What type of cohesion is this?

1. Sequential

2. Communicational

3. Logical

4. Coupled

5. Common Environment