Question 1

In the network database model, a child record can have more than one parent record.

Accepted Answer

This is one of the main features of the network database model. A child record can have multiple parent records, also known as owner records, which allows for more complex and flexible relationships between data entities.

Question 2

The uniform product codes (UPCs) used by supermarkets and other retailers are examples of a block coding scheme.

Accepted Answer

UPCs are a specific example of block codes, where each block of digits is separately processed to detect errors and convert them into symbols or characters that can be easily recognized by a scanner or other device.

Question 3

Another name for sequential coding is block coding.

Accepted Answer

Sequential coding refers to the process of encoding data in a sequence, often used in data transmission or storage, while block coding involves dividing data into fixed-size blocks before encoding, primarily to detect or correct errors.

Question 4

A check digit is a code that includes an extra digit to a code in order to check the accuracy with which the code is keyed into a computer.

Accepted Answer

This is the definition of a check digit. It is a common practice in data entry to help ensure accuracy in the input of data.

Question 5

The centralized database approach to business event processing, in which facts about events are stored in relational database tables instead of separate files, solves many of the problems caused by data redundancy.

Accepted Answer

The centralized database approach allows for better data management and organization, reducing the risk of redundancy and improving data accuracy. Storing event facts in relational database tables instead of separate files also enables easier querying and analysis of the data.

Question 6

Data independence refers to decoupling the data from the system applications, and it is a major difference between the centralized database approach and the applications approach.

Accepted Answer

Data independence is a key characteristic of a centralized database system, as it allows applications to be built and modified without affecting the underlying data structure. In contrast, in an applications approach, the data is typically tightly coupled to the application, making it harder to modify or scale the system.

Question 7

A scanner is used to access a database and to produce inquiry reports.

Accepted Answer

A scanner is a device used to create digital images of physical documents or images. It cannot be used to access a database or produce inquiry reports. That is typically done through software applications or web interfaces.

Question 8

The traditional applications approach to business event processing concentrates on the process being performed.

Accepted Answer

The traditional applications approach to business event processing focuses on the process being performed, whereas the modern approach focuses on the events themselves and their significance.

Question 9

The database management system, containing data related to all an organization's applications, supports normal data processing needs and enhances the organization's management activities by providing data useful to managers.

Accepted Answer

A database management system (DBMS) is designed to support normal data processing needs and enhances an organization's management activities by providing useful data to managers. It centralizes data related to all applications within an organization and allows users to access, manage, and analyze the data in a secure and controlled manner. Therefore, the statement is true.

Question 10

Both the mnemonic and the hierarchical coding schemes attach specific meaning to particular character positions.

Accepted Answer

The answer of Both the mnemonic and the hierarchical coding...

Question 11

A database management system (DBMS) is a set of standalone programs designed to complicate the tasks of creating, accessing, and managing data.

Accepted Answer

A DBMS is designed to simplify, not complicate, the tasks of creating, accessing, and managing data, making it easier for users to interact with databases.

Question 12

The database administrator is responsible for administrative and technical issues related to the database management system.

Accepted Answer

The database administrator (DBA) is responsible for managing and maintaining the database management system, including setting up and managing security, ensuring data consistency and integrity, performance tuning, backup and recovery, and other administrative and technical tasks.

Question 13

The applications approach to data management decouples the data from the applications or other users of the data.

Accepted Answer

The applications approach to data management tightly couples the data with the applications, meaning the data is managed and accessed through specific applications rather than being stored independently.

Question 14

When different information about the same fact is stored in different files the integrity of the data is violated.

Accepted Answer

When different information about the same fact is stored in different files, it can create inconsistencies and discrepancies in the data, which can result in a loss of data integrity. It is important to ensure that all data related to a particular fact is stored in the same file to maintain consistency and integrity.

Question 15

Classifying data refers to grouping or categorizing data according to some common attributes.

Accepted Answer

Classifying data does indeed involve grouping or categorizing data based on shared characteristics.

Question 16

Because it uses alphabetic characters, a sequential coding system is most understandable to human beings.

Accepted Answer

A sequential coding system is based on a logical order or sequence, often numerical, rather than alphabetic characters. Alphabetic characters do not inherently make a coding system more understandable.

Question 17

A description of a portion of a schema is referred to as a subschema.

Accepted Answer

A subschema is a portion of a larger schema that represents a specific section or subset of information. This helps to organize and manage complex data systems more effectively.

Question 18

A DBMS is a set of integrated computer programs designed to simplify the tasks of creating, accessing, and managing a centralized database.

Accepted Answer

A DBMS (Database Management System) is specifically designed to simplify the tasks of creating, accessing, and managing a centralized database, which makes the option A true.

Question 19

The centralized database approach to data management concentrates on the process being performed, rather than on the data themselves.

Accepted Answer

The centralized database approach to data management concentrates on the data themselves, rather than the process being performed. This approach involves storing all data in a central location and providing controlled access to users.

Question 20

Business processes, such as hiring employees, purchasing inventory, and collecting cash from customers, are called events.

Accepted Answer

The answer of Business processes, such as hiring employees, purchasing...

Quiz 5: Database Management Systems