Suppose that the Accounts class in the object database of the previous example has child classes SavingsAccounts and CheckingAccounts and that CheckingAccounts has a child class EconomyCheckingAccounts. Explain how the semantics of inheritance a?ects the retrieval of objects in each class. (For example, what classes need to be accessed to retrieve all checking account objects that satisfy a
particular predicate?)
What will be an ideal response?
Di?erent accounts can be in di?erent classes. A query that potentially might need to access every account would have to access the classes Accounts, SavingsAccounts, CheckingAccounts, EconomyCheckingAccounts.
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Describe the purpose of using inference rules to identify functional dependencies for a given relation.
What will be an ideal response?
SSID broadcasting is when an access point sends out its WPA or WPA2 key to all wireless clients through the air. Those clients attached to the access point are allowed to transmit data
Indicate whether the statement is true or false
The declaration for a union is identical in form to a structure declaration, with the reserved word union used in place of the reserved word struct.
Answer the following statement true (T) or false (F)
When you click item G in the accompanying figure, a list of _______________ is displayed.
Fill in the blank(s) with the appropriate word(s).