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Welcome to the Data Storage and Querying MCQs Page

Dive deep into the fascinating world of Data Storage and Querying with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Storage and Querying, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Storage and Querying, 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 Storage and Querying. 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 Storage and Querying. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Storage and Querying MCQs | Page 15 of 21

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Q141.
Which of the following is an attribute that can uniquely identify a row in a table?

a.

Secondary key

b.

Candidate key

c.

Foreign key

d.

Alternate key

Discuss
Answer: (b).Candidate key
Q142.
Which of the following terms does refer to the correctness and completeness of the data in a database?

a.

Data security

b.

Data constraint

c.

Data independence

d.

Data integrity

Discuss
Answer: (d).Data integrity
Q143.
The relationship between DEPARTMENT and EMPLOYEE is a

a.

One-to-one relationship

b.

One-to-many relationship

c.

Many-to-many relationship

d.

Many-to-one relationship

Discuss
Answer: (b).One-to-many relationship
Q144.
A table can be logically connected to another table by defining a

a.

Super key

b.

Candidate key

c.

Primary key

d.

Unique key

Discuss
Answer: (c).Primary key
Q145.
If the state of the database no longer reflects a real state of the world that the database is supposed to capture, then such a state is called

a.

Consistent state

b.

Parallel state

c.

Durable state

d.

Inconsistent state

Discuss
Answer: (d).Inconsistent state
Q146.
Ensuring isolation property is the responsibility of the

a.

Recovery-management component of the DBMS

b.

Concurrency-control component of the DBMS

c.

Transaction-management component of the DBMS

d.

Buffer management component in DBMS

Discuss
Answer: (b).Concurrency-control component of the DBMS
Q147.
In query processing, the ___________ is the lowest-level operator to access data.

a.

Index Search

b.

Linear search

c.

File scan

d.

Access paths

Discuss
Answer: (c).File scan
Q148.
In a ____________ the system scans each file block and tests all records to see whether they satisfy the selection condition.

a.

Index Search

b.

Linear search

c.

File scan

d.

Access paths

Discuss
Answer: (b).Linear search
Q149.
Index structures are referred to as __________ since they provide a path through which data can be located and accessed.

a.

Index Search

b.

Linear search

c.

File scan

d.

Access paths

Discuss
Answer: (d).Access paths
Q150.
Search algorithms that use an index are referred to as

a.

Index Search

b.

Linear search

c.

File scan

d.

Access paths

Discuss
Answer: (a).Index Search
Page 15 of 21

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