Question 1

The failure to implement a strong database administrative function is the most common source of database failures in organizations.

Accepted Answer

A strong database administrative function ensures proper management of the database, including security, backup, and recovery measures. Without it, databases are susceptible to errors, data loss, and security breaches. Thus, the failure to implement such a function is a common source of database failures in organizations.

Question 2

A relational database establishes the relationships between entities by means of a common field.

Accepted Answer

A relational database connects entities through a common field, which serves as a key for establishing relationships between tables. This allows data to be organized and accessed efficiently, without redundancy or duplication.

Question 3

A data model is a graphical system used to capture the nature and relationships among data,

Accepted Answer

A data model is a visual representation of the data, its attributes, and their relationships. It can be used to understand how data is organized and help design systems and databases.

Question 4

A database management system is an integrated development environment.

Accepted Answer

The answer of A database management system is an integrated...

Question 5

One reason for improved application development productivity with the database approach is that file design and low-level implementation details do not need to be handled by the application programmer.

Accepted Answer

With the database approach, the application programmer can focus on designing and implementing the application logic, while the database system takes care of file management and low-level implementation details such as indexing, concurrency control, and backup and recovery. This can lead to improved productivity and reduced development time.

Question 6

Many of the disadvantages of file processing systems can also be limitations of databases.

Accepted Answer

While databases offer many advantages over file processing systems, they can still suffer from some of the same limitations, such as data redundancy, data inconsistency, and difficulty in accessing data. However, databases offer additional features, such as data integrity, security, and concurrency control, which can help address these limitations.

Question 7

The term legacy system refers to a newly installed database management system.

Accepted Answer

The term legacy system actually refers to an outdated or obsolete computer system or software application that is still in use because it is expensive, difficult, or risky to replace. It is not a newly installed system.

Question 8

A user view is how the user sees the data when it is produced.

Accepted Answer

The answer of A user view is how the user...

Question 9

A well-structured database establishes the entities between relationships in order to derive the desired information.

Accepted Answer

The answer of A well-structured database establishes the entities between...

Question 10

Data redundancy is used to establish relationships between data but is never used to improve database performance.

Accepted Answer

Data redundancy can actually have a negative impact on database performance as it increases the amount of storage required and can also lead to inconsistencies and errors in the data. Therefore, it is important to minimize redundancy in databases to improve performance.

Question 11

Separation of metadata from application programs that use the data is called data independence.

Accepted Answer

Data independence refers to the ability to separate the metadata (i.e. data about the data, such as information on how it is stored or accessed) from the application programs that use the data. This allows for easier maintenance, updates, and changes without affecting the applications that use the data.

Question 12

Reduced program maintenance is an advantage of file processing systems.

Accepted Answer

Contrary to the statement, file processing systems require more maintenance as there is no centralized control over data and programs, making it difficult to update or modify them.

Question 13

Redundancy increases the risk of inconsistent data.

Accepted Answer

Redundancy means having the same data in multiple places, and if one copy is updated but not the others, inconsistencies can arise. This increases the risk of inconsistent data.

Question 14

Cost and complexity are just two of the disadvantages of database processing.

Accepted Answer

Cost and complexity are commonly considered as disadvantages of database processing, and there may be other disadvantages as well such as security concerns, potential for data corruption or loss, and the need for specialized personnel to design, manage, and maintain the database system.

Question 15

A constraint is a rule in a database system that can be violated by users.

Accepted Answer

The answer of A constraint is a rule in a...

Question 16

The data that you are interested in capturing about an entity is called an instance.

Accepted Answer

The answer of The data that you are interested in...

Question 17

A person is an example of an entity.

Accepted Answer

A person is a type of entity, which refers to anything that exists and can be identified as unique and distinct. Other examples of entities include animals, objects, organizations, and concepts.

Question 18

The data repository assists database administrators in enforcing standards.

Accepted Answer

The data repository serves as a central location for storing metadata and database schemas, which can assist database administrators in ensuring that all databases adhere to standardized formats and conventions.

Question 19

End users can often retrieve and display data easily with a relational database

Accepted Answer

A relational database is designed to make it easy for end users to extract and display data, using standard tools such as SQL queries and reporting applications. This is one of the key advantages of a relational database over other data storage systems.

Question 20

Organizations that utilize the file processing approach spend only 20 percent of development time on maintenance.

Accepted Answer

Organizations that utilize the file processing approach typically spend a larger percentage of their development time on maintenance due to the lack of data independence and difficulty in making changes to the structure of the data.

Quiz 1: The Database Environment and Development Process