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DBMS MCQ QUESTIONS
MODEL PAPER – 6
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1. What is the primary purpose of a database system in DBMS?
a. Generating data
b. Organizing data
c. Analyzing data
d. Creating data
Answer: b. Organizing data
2. Which of the following statements
best describes the role of a database system?
a. Storing data in unstructured formats
b. Efficiently managing and organizing structured data
c. Performing complex mathematical calculations
d. Creating data visualizations
Answer: b. Efficiently managing and organizing structured data
3. Why is data organization
crucial in a database system?
a. To generate random data
b. To enhance data security
c. To improve data integrity and accessibility
d. To minimize data redundancy
Answer: c. To improve data integrity and accessibility
4. What is the purpose of data
retrieval in a database system?
a. Deleting data from the database
b. Updating existing records in the database
c. Retrieving specific data for analysis or presentation
d. Creating new data entries
Answer: c. Retrieving specific data for analysis or presentation
5. In the context of a database
system, what does the term "data integrity" refer to?
a. The accuracy and consistency of stored data
b. The speed at which data is retrieved
c. The amount of storage space required for data
d. The security measures implemented for data protection
Answer: a. The accuracy and consistency of stored data
6. What is the significance of
data security in a database system?
a. Increasing data redundancy
b. Ensuring data availability
c. Decreasing data integrity
d. Facilitating data retrieval
Answer: b. Ensuring data availability
7. Which of the following is a
benefit of using a database system for data management?
a. Data duplication and redundancy
b. Simplified data retrieval and manipulation
c. Limited accessibility to data
d. Lack of data relationships
Answer: b. Simplified data retrieval and manipulation
8. What role does a database
system play in supporting concurrent access to data?
a. Limiting access to a single user at a time
b. Enforcing strict data consistency
c. Managing and facilitating multiple users accessing data
simultaneously
d. Restricting access to data retrieval operations only
Answer: c. Managing and facilitating multiple users accessing data
simultaneously
9. Why is data independence
important in a database system?
a. To increase data redundancy
b. To decrease data integrity
c. To facilitate changes in the database schema without affecting
applications
d. To limit data retrieval operations
Answer: c. To facilitate changes in the database schema without
affecting applications
10. What is the primary purpose
of a database administrator (DBA) in a database system?
a. Generating data reports
b. Writing SQL queries
c. Managing user access, security, and system performance
d. Creating data visualizations
Answer: c. Managing user access, security, and system performance
11. What is the significance of
data normalization in a database system?
a. Increasing data redundancy
b. Reducing data consistency
c. Simplifying data retrieval
d. Eliminating data duplication and dependencies
Answer: d. Eliminating data duplication and dependencies
12. What role does a database
system play in data integrity enforcement?
a. Introducing data redundancy
b. Preventing unauthorized access to data
c. Ensuring data consistency and accuracy
d. Slowing down data retrieval operations
Answer: c. Ensuring data consistency and accuracy
13. Why is a database system
considered a valuable tool for decision support?
a. It introduces data inconsistency
b. It facilitates complex data analysis and reporting
c. It limits data retrieval operations
d. It increases data redundancy
Answer: b. It facilitates complex data analysis and reporting
14. What is the purpose of the
SQL language in a database system?
a. Managing transactions
b. Writing queries and manipulating data
c. Creating data visualizations
d. Generating data reports
Answer: b. Writing queries and manipulating data
15. In the context of a database
system, what does the term "data redundancy" refer to?
a. The duplication of data in multiple locations
b. The lack of data relationships
c. The limitation of data retrieval operations
d. The speed at which data is retrieved
Answer: a. The duplication of data in multiple locations
16. What is the primary purpose
of a database index?
a. Increasing data redundancy
b. Accelerating data retrieval
c. Facilitating data inconsistency
d. Simplifying data retrieval
Answer: b. Accelerating data retrieval
17. What role does a database
system play in supporting data relationships?
a. Introducing data redundancy
b. Limiting data retrieval operations
c. Enforcing referential integrity and maintaining links between
tables
d. Decreasing data consistency
Answer: c. Enforcing referential integrity and maintaining links between
tables
18. How does a database system
contribute to data availability?
a. By limiting access to a single user at a time
b. By enforcing strict data consistency
c. By managing and facilitating multiple users accessing data
simultaneously
d. By restricting access to data retrieval operations only
Answer: c. By managing and facilitating multiple users accessing data
simultaneously
19. What is the purpose of data
modeling in a database system?
a. Generating data
b. Organizing data
c. Representing the structure and relationships of data
d. Creating data visualizations
Answer: c. Representing the structure and relationships of data
20. Why is data abstraction
important in a database system?
a. To increase data redundancy
b. To limit data retrieval operations
c. To simplify interactions with the database by hiding complexity
d. To decrease data integrity
Answer: c. To simplify interactions with the database by hiding
complexity
21. What is the role of a transaction in a database system?
a. Storing data in unstructured formats
b. Efficiently managing and organizing structured data
c. Facilitating the execution of multiple related operations as a single
unit
d. Performing complex mathematical calculations
Answer: c. Facilitating the execution of multiple related operations as
a single unit
22. Why is data consistency
crucial in a database system?
a. To introduce data redundancy
b. To facilitate changes in the database schema
c. To ensure that data is accurate and reliable
d. To minimize data retrieval operations
Answer: c. To ensure that data is accurate and reliable
23. What is the purpose of the
SQL JOIN operation in a database system?
a. Sorting records
b. Combining rows from two or more tables based on a related column
c. Grouping records based on specified columns
d. Joining tables
Answer: b. Combining rows from two or more tables based on a related
column
24. How does a database system
contribute to data security?
a. By increasing data redundancy
b. By enforcing strict data consistency
c. By implementing access controls and authentication mechanisms
d. By limiting data retrieval operations
Answer: c. By implementing access controls and authentication mechanisms
25. What is the role of a
database schema in a database system?
a. Storing data in unstructured formats
b. Efficiently managing and organizing structured data
c. Representing the structure and relationships of data
d. Creating data visualizations
Answer: c. Representing the structure and relationships of data
26. Why is data normalization
essential in a database system?
a. To introduce data redundancy
b. To decrease data consistency
c. To eliminate data duplication and dependencies
d. To limit data retrieval operations
Answer: c. To eliminate data duplication and dependencies
27. What role does a Database
Administrator (DBA) play in a database system?
a. Generating data
b. Organizing data
c. Managing user access, security, and system performance
d. Creating data visualizations
Answer: c. Managing user access, security, and system performance
28. In a database system, what is
the significance of query optimization?
a. To decrease data consistency
b. To simplify interactions with the database by hiding complexity
c. To limit data retrieval operations
d. To improve the efficiency of data retrieval
Answer: d. To improve the efficiency of data retrieval
29. How does a database system support
data independence?
a. By limiting access to a single user at a time
b. By facilitating changes in the database schema without affecting
applications
c. By enforcing strict data consistency
d. By introducing data redundancy
Answer: b. By facilitating changes in the database schema without
affecting applications
30. What is the primary purpose
of the SQL SELECT statement in a database system?
a. Sorting records
b. Retrieving data from the database
c. Updating existing records in the database
d. Deleting records from the database
Answer: b. Retrieving data from the database
31. What is the significance of data warehousing in a database system?
a. To introduce data redundancy
b. To facilitate changes in the database schema
c. To consolidate and manage large volumes of historical data for
analysis
d. To limit data retrieval operations
Answer: c. To consolidate and manage large volumes of historical data
for analysis
32. How does a database system
contribute to data scalability?
a. By enforcing strict data consistency
b. By limiting the number of users accessing data
c. By facilitating the system's ability to handle growing amounts of
data and users
d. By introducing data redundancy
Answer: c. By facilitating the system's ability to handle growing
amounts of data and users
33. What role does a database
system play in supporting data backup and recovery?
a. By increasing data redundancy
b. By limiting data retrieval operations
c. By providing mechanisms to regularly backup and restore data
d. By enforcing strict data consistency
Answer: c. By providing mechanisms to regularly backup and restore data
34. What is the purpose of the
SQL UPDATE statement in a database system?
a. Sorting records
b. Retrieving data from the database
c. Updating existing records in the database
d. Deleting records from the database
Answer: c. Updating existing records in the database
35. How does a database system
contribute to data concurrency control?
a. By facilitating changes in the database schema without affecting
applications
b. By enforcing strict data consistency
c. By managing and coordinating multiple users accessing data
simultaneously
d. By introducing data redundancy
Answer: c. By managing and coordinating multiple users accessing data
simultaneously
36. What is the purpose of the
SQL DELETE statement in a database system?
a. Sorting records
b. Retrieving data from the database
c. Updating existing records in the database
d. Deleting records from the database
Answer: d. Deleting records from the database
37. In a database system, what is
the significance of data archiving?
a. To limit data retrieval operations
b. To introduce data redundancy
c. To store historical data in a separate location for long-term
retention
d. To enforce strict data consistency
Answer: c. To store historical data in a separate location for long-term
retention
38. How does a database system
contribute to supporting data relationships and constraints?
a. By enforcing strict data consistency
b. By limiting data retrieval operations
c. By introducing data redundancy
d. By defining and maintaining relationships and constraints between
tables
Answer: d. By defining and maintaining relationships and constraints
between tables
39. What role does a database
system play in supporting data recovery after system failures?
a. By introducing data redundancy
b. By limiting data retrieval operations
c. By providing mechanisms to recover data after system failures
d. By enforcing strict data consistency
Answer: c. By providing mechanisms to recover data after system failures
40. What is the purpose of the
SQL INSERT statement in a database system?
a. Retrieving data from the database
b. Inserting new records into the database
c. Updating existing records in the database
d. Deleting records from the database
Answer: b. Inserting new records into the database
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