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Which three options does an entity object automatically implement? (Choose three.)
A. primary key functionality based on any column in the database that is marked as a primary key
B. not-null functionality based on any column in the database that is marked as not null
C. attribute precision based on column size
D. all table check constraints
E. any table triggers
Correct Answer: ABC
Explanation/Reference:
When you create an entity object from an existing table, first JDeveloper interrogates the data dictionary to infer the following information:
The primary and unique key attributes
The mandatory flag on attributes, based on NOT NULL constraints
The length and precision of each attribute
The Java-friendly entity attribute names from the names of the table’s columns (for example, USER_ID -> UserId)
The SQL and Java data types of each attribute based on those of the underlying column
The relationships between the new entity object and other entities based on foreign key constraints
References: http://docs.oracle.com/cd/E48682_01/web.1111/b31974/bcentities.htm
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