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Welcome to the Data Models MCQs Page

Dive deep into the fascinating world of Data Models with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Models, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Models, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

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Check out the MCQs below to embark on an enriching journey through Data Models. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Data Models. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Models MCQs | Page 2 of 19

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Q11.
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

Discuss
Answer: (a).A domain constraint
Q12.
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.

Discuss
Answer: (c).the child table.
Q13.
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

Discuss
Answer: (a).Null status
Q14.
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

Discuss
Answer: (b).NOT NULL
Q15.
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

Discuss
Answer: (b).Data type
Q16.
If a denormalization situation exists with a one-to-one binary relationship, which of the following is true?

a.

All fields are stored in one relation.

b.

All fields are stored in two relations.

c.

All fields are stored in three relations.

d.

All fields are stored in four relations.

Discuss
Answer: (a).All fields are stored in one relation.
Q17.
Selecting a data type involves which of the following?

a.

Maximize storage space

b.

Represent most values

c.

Improve data integrity

d.

All of the above

Discuss
Answer: (c).Improve data integrity
Q18.
What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary?

a.

VARCHAR2

b.

CHAR

c.

LONG

d.

NUMBER

Discuss
Answer: (a).VARCHAR2
Q19.
A multidimensional database model is used most often in which of the following models?

a.

Data warehouse

b.

Relational

c.

Hierarchical

d.

Network

Discuss
Answer: (a).Data warehouse
Q20.
Which of the following is not a factor to consider when switching from small to large block size?

a.

The length of all of the fields in a table row.

b.

The number of columns

c.

Block contention

d.

Random row access speed

Discuss
Answer: (b).The number of columns
Page 2 of 19

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