Question 1

SQL is a non-procedural programming language.

Accepted Answer

SQL stands for Structured Query Language, and it is a non-procedural language used to manage and manipulate relational databases. It does not involve the use of explicit instructions or step-by-step procedures to achieve a result. Instead, it focuses on the specification of what data to retrieve or modify, and the database management system determines how to perform the operation efficiently.

Question 2

A petabyte is 10¹⁵ bytes (characters).

Accepted Answer

A petabyte is 10¹⁵ bytes (characters).

Question 3

A database alias can also arise because the same data item is called different things in different programs written in different languages.

Accepted Answer

This statement is true. A database alias can be used to provide consistency in terminology across different programs that access the same data, even if those programs were written in different languages and refer to the same data item by different names.

Question 4

OLAP is a multidimensional generalization of the 3-dimensional relational table.

Accepted Answer

OLAP (Online Analytical Processing) is a technology that allows users to analyze information from multiple database systems at the same time, and it is not limited to a generalization of a 3-dimensional relational table. It is designed to handle multidimensional data and supports complex calculations, trend analysis, and data modeling across multiple dimensions, which can be more than three dimensions.

Question 5

Individual logical expressions may be combined in a FROM clause with the Boolean operator AND in SQL.

Accepted Answer

In SQL, logical expressions are typically combined in the WHERE clause, not the FROM clause, using Boolean operators like AND.

Question 6

Software tools such as Casewise are used to visually represent the E-R models.

Accepted Answer

Casewise is a software tool used for visual modeling of enterprise architecture and business processes. It can also be used to create Entity-Relationship (E-R) models.

Question 7

An advantage of OLAP is its fast response time.

Accepted Answer

OLAP is designed to quickly retrieve and analyze large amounts of data, making it a useful tool for businesses that need to make real-time decisions.

Question 8

A major advantage of DBMS is its ability to construct special database files quickly and efficiently.

Accepted Answer

DBMS uses various techniques such as indexing and query optimization to construct special database files quickly and efficiently. This leads to faster retrieval of data and improved overall performance.

Question 9

In SQL,WHERE must be used to determine which records from the tables listed in the FROM clause will appear in the results of the SELECT statement.

Accepted Answer

The answer of In SQL,WHERE must be used to determine...

Question 10

A data dictionary can only be used with a DBMS.

Accepted Answer

A data dictionary can be used in various contexts beyond a DBMS, such as in software engineering for documentation or in data management systems to define data elements.

Question 11

Database software primarily deals with the physical aspects of file use,while accounting application software deals with the logical aspect of file use.

Accepted Answer

Database software deals with the logical organization and manipulation of data, while accounting application software deals with the physical aspects such as storing and retrieving data from files.

Question 12

A database together with database software is database agnosticity.

Accepted Answer

Database agnosticity refers to the ability of a software application to work with different types of databases, regardless of the specific database software involved. However, the combination of a specific database and its corresponding database software is not considered agnostic.

Question 13

OLAP uses simple multidimensional "indexes" called aggregations in data mining applications.

Accepted Answer

The answer of OLAP uses simple multidimensional "indexes" called aggregations...

Question 14

A database is a structured collection of data stored in a computer system or network.

Accepted Answer

A database is a structured collection of data stored in a computer system or network.

Question 15

A database management system is independent of the application software therefore permitting upgrading or modifying the eBusiness application without changing data or database software.This is referred to as database agnosticity.

Accepted Answer

This statement is true. A database management system is separate from application software, allowing for updates or changes to the software without affecting the database or data software used. This is known as database agnosticity.

Question 16

The move to object-oriented design is due to the fact that OO databases outperform relational databases in a wide range of common tasks that are typically performed in a business environment.

Accepted Answer

The statement is false. The move to object-oriented design is not necessarily due to the performance of OO databases compared to relational databases. There are other reasons such as better data modeling, code reusability, and encapsulation of data and behavior. Moreover, relational databases still have advantages in certain areas such as data consistency and scalability.

Question 17

Object-oriented modeling can be easily transformed into OO program code.

Accepted Answer

Object-oriented modeling is a process of creating a conceptual model in which objects are identified along with their attributes and relationships. This conceptual model can then be easily transformed into OO program code, as the code can be designed to mimic the structure and behavior of the objects in the model. Therefore, the statement is true.

Question 18

When a DBA is present and active within an organization,users are almost always willing to give up their responsibility for data elements.

Accepted Answer

While having a DBA can help ensure the smooth functioning and organization of a database, it is important for users to still take responsibility for the accuracy and completeness of their data elements. Ultimately, both the DBA and the users have a role to play in ensuring the success of a database system.

Question 19

Database drivers,NOT database connectors,can be used to connect the business application to the DBMS.

Accepted Answer

Database drivers and database connectors are terms often used interchangeably to refer to software components that enable a business application to connect to a DBMS (Database Management System).

Question 20

In some respects,the word "file" loses its meaning in a database environment.

Accepted Answer

In a database environment, data is typically organized in tables or collections instead of individual files. Therefore, the traditional meaning of a "file" as a collection of data stored in a single document loses relevance in this context.

Quiz 13: Data Management Concepts

SQL is a non-procedural programming language.

A petabyte is 1015 bytes (characters).

A database alias can also arise because the same data item is called different things in different programs written in different languages.

OLAP is a multidimensional generalization of the 3-dimensional relational table.

Individual logical expressions may be combined in a FROM clause with the Boolean operator AND in SQL.

Software tools such as Casewise are used to visually represent the E-R models.

An advantage of OLAP is its fast response time.

A major advantage of DBMS is its ability to construct special database files quickly and efficiently.

In SQL,WHERE must be used to determine which records from the tables listed in the FROM clause will appear in the results of the SELECT statement.

A data dictionary can only be used with a DBMS.

Database software primarily deals with the physical aspects of file use,while accounting application software deals with the logical aspect of file use.

A database together with database software is database agnosticity.

OLAP uses simple multidimensional "indexes" called aggregations in data mining applications.

A database is a structured collection of data stored in a computer system or network.

A database management system is independent of the application software therefore permitting upgrading or modifying the eBusiness application without changing data or database software.This is referred to as database agnosticity.

The move to object-oriented design is due to the fact that OO databases outperform relational databases in a wide range of common tasks that are typically performed in a business environment.

Object-oriented modeling can be easily transformed into OO program code.

When a DBA is present and active within an organization,users are almost always willing to give up their responsibility for data elements.

Database drivers,NOT database connectors,can be used to connect the business application to the DBMS.

In some respects,the word "file" loses its meaning in a database environment.

A petabyte is 10¹⁵ bytes (characters).