Oracle
1Z0-071 · Question #61
Which two statements are true regarding constraints? (Choose two.)
The correct answer is C. The column with a UNIQUE constraint can store NULLS. D. You can have more than one column in a table as part of a primary key. See the full explanation below for the reasoning.
Question
Which two statements are true regarding constraints? (Choose two.)
Options
- AA constraint is enforced only for an INSERT operation on a table.
- BA foreign key cannot contain NULL values.
- CThe column with a UNIQUE constraint can store NULLS.
- DYou can have more than one column in a table as part of a primary key.
How the community answered
(30 responses)- A7% (2)
- B17% (5)
- C77% (23)
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