Oracle
1Z0-860 · Question #93
A developer maps the abstract entity class Account with concrete entity sub-classes Credit Card Account and Savings Account using the single table per class hierarchy strategy. Which two statements…
The correct answer is A. Instances of Credit Card Account and Savings Account are stored in the same table. D. All columns that correspond to fields declared in Credit Card Account or Savings Account must be. See the full explanation below for the reasoning.
Question
A developer maps the abstract entity class Account with concrete entity sub-classes Credit Card Account and Savings Account using the single table per class hierarchy strategy. Which two statements are true? (Choose two.)
Options
- AInstances of Credit Card Account and Savings Account are stored in the same table.
- BAll columns that correspond to fields declared in Account must be defined as nullable in the database.
- CThe fields declared in Account are stored in a different table than the ones declared in Credit Card
- DAll columns that correspond to fields declared in Credit Card Account or Savings Account must be
How the community answered
(40 responses)- A83% (33)
- B5% (2)
- C13% (5)
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