Data Models into Database Designs

Q1: A unique, DBMS-supplied identifier used as the primary key of a relation is called a(n):

A primary key.

B foreign key.

C composite key.

D surrogate key.

Q2: Which constraint requires that the binary relationship indicate all combinations that must appear in the ternary relationship?

A MUST COVER

B MUST NOT

C Both of the above.

D None of the above is correct.

Q3: 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.

Q4: Which of the following column properties would be used to specify that cells in a column must contain a monetary value?

A Null status

B Data type

C Default value

D Data constraints

Q5: Which of the following column properties would be used to specify that cells in a column must be immediately filled with a monetary value of $10,000?

A Null status

B Data type

C Default value

D Data constraints

Q6: Which of the following data constraints would be used to specify that the value of a cell in one column must be less than the value of a cell in another column in the same row of the same table?

A A domain constraint

B A range constraint

C An intrarelation constraint

D An interrelation constraint

Q7: The identifier of an entity will become the ________ of the new table.

A foreign key

B main attribute

C primary key

D identity key

Q8: For every relationship, how many possible sets of minimum cardinalities are there?

A Two

B Three

C Four

D Six

Q9: In a 1:1 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.

Q10: Which of the following situation requires the use of ID-dependent entities?

A Association relationships only

B Multivalued attributes only

C Archetype/instance relationships only

D All of the above use ID dependent entities

Q11: A foreign key is:

A a column containing the primary key of another table.

B used to define data types.

C used to define null status.

D all of the above are above correct.

Q12: Which of the following columns is(are) are required in a table?

A A foreign key

B An alternate key

C A primary key

D A surrogate key.

Q13: 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.

Q14: Which of the following column properties would be used to specify that cells in a column must contain a monetary value that is less than another monetary value in the same row?

A Null status

B Data type

C Default value

D Data constraints

Q15: Which of the following data constraints would be used to specify that the value of cells in a column must be one of a specific set of possible values?

A A domain constraint

B A range constraint

C An intrarelation constraint

D An interrelation constraint

Q16: Which of the following column properties specifies whether or not cells in a column must contain a data value?

A Null status

B Data type

C Default value

D Data constraints

Q17: For every relationship, how many possible types of actions are there when enforcing minimum cardinalities?

A Two

B Three

C Four

D Six

Q18: If a relationship has a cascade updates constraint, then if ________ in the parent table is changed, then the same change will automatically be made to any corresponding foreign key value.

A the primary key

B any alternate key

C a surrogate key

D a foreign key

Q19: Each entity is represented as a(n):

A tuple.

B table.

C attribute.

D file.

Q20:
Which is not true about surrogate keys?

A They are short.

B They are fixed.

C They have meaning to the user.

D They are numeric.


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