For every relationship, how many possible sets of minimum cardinalities are there?
A. Two
B. Three
C. Four
D. Six
Answer: Option C
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A. A domain constraint
B. A range constraint
C. An intrarelation constraint
D. An interrelation constraint
In a 1:N relationship, the foreign key is placed in:
A. either table without specifying parent and child tables.
B. the parent table.
C. the child table.
D. either the parent table or the child table.
A. Null status
B. Data type
C. Default value
D. Data constraints
A primary key should be defined as:
A. NULL.
B. NOT NULL.
C. Either of the above can be used.
D. None of the above are correct.
1 to 1
1 to n
n to 1
n to n
Though 2nd and 3rd make no sense.
would you please explain this