Specialization class may be subsumed into generalization

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Reference no: EM132227578

1. The type designation Numeric(8,2) means 8 digits, 2 of them to the right of the decimal.

True or False

2. A specialization class may be subsumed into the generalization class when it is converted to a relational table.

True or False

3. Which of the following is NOT a valid operation when defining a foreign key the default action when the referenced tuple is deleted?

a. set null

b. cascade

c. restrict

d. remove

4. Classes not derived from other classes are called

a. abstract classes

b. specialization classes

c. association classes

d. base classes

5. An SQL data type used for strings is

a. Text

b. Currency

c. String

d. VarChar

Reference no: EM132227578

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