Which two statements are true regarding constraints? (Choose two.)

Question

Options

• AA foreign key cannot contain NULL values.
• BA column with the UNIQUE constraint can contain NULL.
• CA constraint is enforced only for the INSERT operation on a table.
• DA constraint can be disabled even if the constraint column contains data.
• EAll the constraints can be defined at the column level as well as the table level

• A
  3% (1)
• B
  83% (25)
• C
  10% (3)
• E
  3% (1)

No community discussion yet for this question.