What are the categories of design objects (classes)?
What will be an ideal response?
Design classes fall into three major categories:
? Control. These classes control the flow of the application, direct the sequencing of events, manage the interaction of other objects and frequently enforce such business rules that go beyond the domain of a specific class but relate to a specific use case or go across use cases. Control classes are not directly involved in the interaction between the application and the outside world, but delegate these tasks to "boundary" classes.
? Boundary. Boundary classes control the interaction between the system or application and entities outside the system such as human actors (user interface), communications and persistence (databases, files, etc.).
? Utility. These "helper" classes offer services (such as calculations) that are usually independent of the application's flow and do not go beyond its boundaries.
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A friend asks to borrow $55 from you and in return will pay you $58 in one year. If your bank is offering a 6% interest rate on deposits and loans:
a. How much would you have in one year if you deposited the $55 instead? b. How much money could you borrow today if you pay the bank $58 in one year? c. Should you loan the money to your friend or deposit it in the bank?
Transactions are initially recorded in chronological order in a __________ before they are transferred to the accounts.
A. journal B. register C. ledger D. T account