Question 1

Which of the following is NOT a data administration task?

Accepted Answer

Creating a conceptual database model is a database design task, not a data administration task. Data administration tasks involve managing and maintaining the database system, ensuring its security, providing backup and recovery, and other related tasks.

Question 2

The application development component provides functionalities to the developers of:

Accepted Answer

The application development component provides functionalities specifically for front-end applications, allowing developers to create and customize user interfaces and user experiences for the application. The other options (database models, security and backup procedures, data dictionaries) are typically handled by other components within the development process.

Question 3

In a role-based access control system,users can be assigned several database roles.

Accepted Answer

In a role-based access control system, users can be assigned several roles that determine their level of authorization and access to database resources. These roles can be defined based on job function, department, or other criteria and can be assigned or revoked as needed for security purposes.

Question 4

The data definition DBMS component uses the SQL commands from the DDL category.

Accepted Answer

The Data Definition Language (DDL) is a subset of SQL commands that is used to define and manage the overall structure of a database. It is used to create, modify, and delete database objects such as tables, indexes, views, and procedures. Therefore, the data definition DBMS component uses SQL commands from the DDL category.

Question 5

If,during the use of the database system,it becomes apparent that a new relation needs to be added to the database,the decision to add the new relation to the database will rest with the:

Accepted Answer

The answer of If,during the use of the database system,it...

Question 6

The data manipulation DBMS component uses the SQL commands from the DCL category.

Accepted Answer

The data manipulation DBMS component uses the SQL commands from the DML (data manipulation language) category, not DCL (data control language). DCL commands are used to manage user access and permissions to the database.

Question 7

The TCL commands are used by the business end users of a database system.

Accepted Answer

TCL (Transaction Control Language) commands in SQL, such as COMMIT, ROLLBACK, and SAVEPOINT, are primarily used by database administrators and developers to manage transactions in the database, not by business end users.

Question 8

The application development component is a part of every DBMS package.

Accepted Answer

Application development components, such as tools for designing and developing applications, are not inherently part of every Database Management System (DBMS) package; they are often provided as separate tools or integrated into specific DBMS solutions.

Question 9

The data dictionary created by the ________ is often referred to as the catalog.

Accepted Answer

The data dictionary is created by the database management system (DBMS) to store metadata about the database schema, including information about tables, columns, indexes, and relationships. It is often referred to as the catalog. TCL (Transaction Control Language), DML (Data Manipulation Language), and DCL (Data Control Language) are all components of SQL used to manage the database, but they are not responsible for creating the data dictionary or catalog.

Question 10

What will be the outcome of the following SQL statements issued in the HAPPY INSURANCE database?
GRANT SELECT,INSERT,ALTER,UPDATE ON client TO shannon;
REVOKE INSERT ON client FROM shannon;

Accepted Answer

The GRANT statement initially gives Shannon SELECT, INSERT, ALTER, and UPDATE permissions on the CLIENT table. However, the subsequent REVOKE statement removes the INSERT permission. Therefore, Shannon retains the ability to read data from CLIENT (SELECT), change data in CLIENT (UPDATE), and change the metadata of CLIENT (ALTER).

Question 11

The data manipulation DBMS component is used:

Accepted Answer

The data manipulation component of a DBMS is used by end users either directly or through front-end applications. End users may use SQL queries, forms, or other interfaces to manipulate the data stored in the database. Front-end applications such as reporting tools or analytics tools also make use of the data manipulation component. Thus, option C is the best choice.

Question 12

The data manipulation component is a part of every DBMS package.

Accepted Answer

Every DBMS package has a data manipulation component that allows users to create, insert, update, and delete data from the database.

Question 13

The data definition component is a part of every DBMS package.

Accepted Answer

The data definition component, also known as Data Definition Language (DDL), is a fundamental feature of every DBMS package. It allows users to create, modify, and delete the database schema or structure, including tables, views, indexes, and other database objects. Without DDL, users can't define the data types, relationships, constraints, or other elements that make up the database model. Therefore, it's an essential part of any DBMS.

Question 14

The DCL commands are used by the business end users of a database system.

Accepted Answer

DCL (Data Control Language) commands are used by database administrators to control access to the database, grant/revoke privileges, and set roles and permissions. Business end users typically do not have the authority or technical knowledge to use DCL commands directly.

Question 15

What will be the outcome of the following SQL statements issued in the HAPPY INSURANCE database?
CREATE ROLE supervisor;
GRANT SELECT,INSERT,UPDATE ON client TO supervisor;
GRANT SUPERVISOR TO shannon;

Accepted Answer

The first statement creates a new role called "supervisor". 
The second statement grants SELECT, INSERT, and UPDATE privileges on the "client" table to the "supervisor" role. 
The third statement grants the "supervisor" role to "shannon". Therefore, "shannon" can read data from, change data in, and insert data into the "client" table, but cannot change the metadata of the "client" table.

Question 16

In a role-based access control system,the membership of users in roles cannot change.

Accepted Answer

In a role-based access control system, the membership of users in roles can change as users can be added, removed or assigned to different roles based on their changing responsibilities or permissions.

Question 17

HAPPY INSURANCE

Observe the HAPPY INSURANCE DATABASE:
 $\begin{array} { l l c l } \text { CLIENT } & & \ \text { ClientlD } & \text { ClentName } & \text { CientAgent } & \text { ClientSpouseName } \ \text { C111 } & \text { Tom } & \text { A1 } & \text { Jenny } \ \text { C212 } & \text { Kanin } & A 1 & \text { Bil } \ \text { C333 } & \text { Cole } & A 2 & \text { Amy } \ \text { C444 } & \text { Dorothy } & A 2 & \ \text { C555 } & \text { Anay } & A 3 & \text { Ams } \ \text { C666 } & \text { Tina } & A 3 & \text { Mait } \ \text { C777 } & \text { Christina } & A 4 & \text { Mike } \end{array}$

AGENT
$\begin{array} { l l c l c c } \text { AgentID } & \text { AgentName } & \text { AgentArea } & \text { AgentRating } & \text { AgentYearoffire SupervisedBy } \ \text { A1 } & \text { Kate } & 1 & 101 & 1990 & \ \text { A2 } & \text { Amy } & 2 & 92 & 2009 & \text { Al } \ \text { A3 } & \text { Luke } & 3 & 100 & 1992 & \ \text { A4 } & \text { James } & 3 & 90 & 2010 & \mathrm {~A} 3 \end{array}$

AREA
$\begin{array}{lll}
\text { ArealD } & \text { AreaName } & \text { AreaHQ } \
1 & \text { East } & \text { Boston } \
2 & \text { West } & \text { San Francisco } \
3 & \text { Central } & \text { Chicago }
\end{array}$

This database will be used for the following questions citing tables from the HAPPY INSURANCE database.
-How many records will the following query in the HAPPY INSURANCE database return?
SELECT DISTINCT table_name
FROM user_tab_columns;

Accepted Answer

The query searches for the distinct table names from the metadata table "user_tab_columns". There are only 3 tables in the HAPPY INSURANCE database, so the query will return 3 distinct table names.

Question 18

What number will the following query in the HAPPY INSURANCE database return?
SELECT count (DISTINCT column_name)
FROM user_tab_columns;

Accepted Answer

The query will return the count of distinct column names in the table "user_tab_columns". Since it is a database for an insurance company, there are likely to be many tables and columns in the database. Therefore, it is reasonable to expect that the count of distinct column names will be more than 10 or even 13. Hence, the best choice is D, which is the highest option provided.

Question 19

Regular monitoring helps the DBA recognize instances when maintenance activities are needed.

Accepted Answer

Regular monitoring allows the DBA to identify trends, patterns, and potential issues, which can help them take proactive measures before an issue occurs, and perform the necessary maintenance activities to ensure optimal performance of the database system.

Question 20

HAPPY INSURANCE

Observe the HAPPY INSURANCE DATABASE:
 $\begin{array} { l l c l } \text { CLIENT } & & \ \text { ClientlD } & \text { ClentName } & \text { CientAgent } & \text { ClientSpouseName } \ \text { C111 } & \text { Tom } & \text { A1 } & \text { Jenny } \ \text { C212 } & \text { Kanin } & A 1 & \text { Bil } \ \text { C333 } & \text { Cole } & A 2 & \text { Amy } \ \text { C444 } & \text { Dorothy } & A 2 & \ \text { C555 } & \text { Anay } & A 3 & \text { Ams } \ \text { C666 } & \text { Tina } & A 3 & \text { Mait } \ \text { C777 } & \text { Christina } & A 4 & \text { Mike } \end{array}$

AGENT
$\begin{array} { l l c l c c } \text { AgentID } & \text { AgentName } & \text { AgentArea } & \text { AgentRating } & \text { AgentYearoffire SupervisedBy } \ \text { A1 } & \text { Kate } & 1 & 101 & 1990 & \ \text { A2 } & \text { Amy } & 2 & 92 & 2009 & \text { Al } \ \text { A3 } & \text { Luke } & 3 & 100 & 1992 & \ \text { A4 } & \text { James } & 3 & 90 & 2010 & \mathrm {~A} 3 \end{array}$

AREA
$\begin{array}{lll}
\text { ArealD } & \text { AreaName } & \text { AreaHQ } \
1 & \text { East } & \text { Boston } \
2 & \text { West } & \text { San Francisco } \
3 & \text { Central } & \text { Chicago }
\end{array}$

This database will be used for the following questions citing tables from the HAPPY INSURANCE database.
-How many records will the following query in the HAPPY INSURANCE database return?
SELECT table_name,column_name
FROM user_tab_columns;

Accepted Answer

The query is designed to retrieve information about the structure of the database, specifically the names of tables and their columns from a system table named "user_tab_columns," which is commonly found in Oracle databases. Given the structure of the HAPPY INSURANCE database, which includes three tables (CLIENT, AGENT, AREA) with varying numbers of columns (CLIENT has 4 columns, AGENT has 6 columns, and AREA has 3 columns), the total number of records returned by the query would be the sum of the columns across all tables, which is 4 (CLIENT) + 6 (AGENT) + 3 (AREA) = 13.

Quiz 10: Overview of Dbms Functionalities and Database Administration

Which of the following is NOT a data administration task?

The application development component provides functionalities to the developers of:

In a role-based access control system,users can be assigned several database roles.

The data definition DBMS component uses the SQL commands from the DDL category.

If,during the use of the database system,it becomes apparent that a new relation needs to be added to the database,the decision to add the new relation to the database will rest with the:

The data manipulation DBMS component uses the SQL commands from the DCL category.

The TCL commands are used by the business end users of a database system.

The application development component is a part of every DBMS package.

The data dictionary created by the ________ is often referred to as the catalog.

What will be the outcome of the following SQL statements issued in the HAPPY INSURANCE database? GRANT SELECT,INSERT,ALTER,UPDATE ON client TO shannon; REVOKE INSERT ON client FROM shannon;

The data manipulation DBMS component is used:

The data manipulation component is a part of every DBMS package.

The data definition component is a part of every DBMS package.

The DCL commands are used by the business end users of a database system.

What will be the outcome of the following SQL statements issued in the HAPPY INSURANCE database? CREATE ROLE supervisor; GRANT SELECT,INSERT,UPDATE ON client TO supervisor; GRANT SUPERVISOR TO shannon;

In a role-based access control system,the membership of users in roles cannot change.

What number will the following query in the HAPPY INSURANCE database return? SELECT count (DISTINCT column_name) FROM user_tab_columns;

Regular monitoring helps the DBA recognize instances when maintenance activities are needed.