Which two statements are true about foreign key constraints? (Choose two.)

Question

Options

• AThe foreign key constraint columns must be supported by an index.
• BThe foreign key constraint columns must be defined as NOT NULL.
• CThe number and data types of foreign key constraint columns must match the parent key.
• DThe columns of one foreign key constraint cannot be used in another foreign key constraint.
• ETo define a foreign key constraint there must be an associated primary key or unique key in the

• A
  11% (5)
• B
  4% (2)
• C
  80% (37)
• D
  4% (2)

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