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Capítulo 2 Cierto o Falso

Descrição

Just do it!
Angel Perez
Quiz por Angel Perez, atualizado more than 1 year ago
Angel Perez
Criado por Angel Perez mais de 7 anos atrás
21
1
0

Resumo de Recurso

Questão 1

Questão
Users may access the DBMS or indirectly through application programs.
Responda
  • True
  • False

Questão 2

Questão
The database is processed by the DBMS.
Responda
  • True
  • False

Questão 3

Questão
A database contains four main elements: user data, application programs, metadata, and indexes.
Responda
  • True
  • False

Questão 4

Questão
Today, most databases represent user data as trees of data.
Responda
  • True
  • False

Questão 5

Questão
In a relation, the columns of the relation contain records for particular entities in the business environment, and the rows of the relation contain fields or attributes.
Responda
  • True
  • False

Questão 6

Questão
In a relation, the columns of the relation contain fields or attributes, and the rows of the relation contain records for particular entities in the business environment.
Responda
  • True
  • False

Questão 7

Questão
Most DBMS products store the metadata in the form of tables.
Responda
  • True
  • False

Questão 8

Questão
System tables contain the user's data.
Responda
  • True
  • False

Questão 9

Questão
Developers have a special set of tools for querying metadata that is separate from the query tools for user's data.
Responda
  • True
  • False

Questão 10

Questão
Overhead data is a synonym for metadata.
Responda
  • True
  • False

Questão 11

Questão
Overhead data is composed primarily of indexes.
Responda
  • True
  • False

Questão 12

Questão
Indexes and linked lists are both types of overhead data.
Responda
  • True
  • False

Questão 13

Questão
Overhead data contains types of data structures that can improve the performance and accessibility of the database.
Responda
  • True
  • False

Questão 14

Questão
Indexes are beneficial for search operations, but at the cost of slowing down sorting operations.
Responda
  • True
  • False

Questão 15

Questão
Indexes should be created for every field in a relation, even if they are not currently needed, to support future uses of the data.
Responda
  • True
  • False

Questão 16

Questão
Application metadata is used to store the structure of some application components in the database.
Responda
  • True
  • False

Questão 17

Questão
Although all DBMS products do not support application components, all DBMS products that do support application components store the structure of those components in application metadata.
Responda
  • True
  • False

Questão 18

Questão
While users can not access the application metadata directly, database developers often must directly access application metadata to create database application programs.
Responda
  • True
  • False

Questão 19

Questão
The design tool subsystem of the DBMS is responsible for processing the application components.
Responda
  • True
  • False

Questão 20

Questão
The design tools subsystem of the DBMS can facilitate the design of a database, but does not have tools to help in actually implementing the design.
Responda
  • True
  • False

Questão 21

Questão
If a DBMS includes a programming language or an interface to a programming language, it is considered to be part of the design tool subsystem of the DBMS.
Responda
  • True
  • False

Questão 22

Questão
If a DBMS includes a programming language or an interface to a programming language, it is considered to be part of the design tool subsystem of the DBMS.
Responda
  • True
  • False

Questão 23

Questão
The run-time subsystem of the DBMS processes the application components.
Responda
  • True
  • False

Questão 24

Questão
The DBMS engine acts as an intermediary between the other DBMS components and the database data.
Responda
  • True
  • False

Questão 25

Questão
The DBMS engine receives requests from the run-time subsystem and the design tools subsystem and translates them into commands for the operating system to read and write data on physical media.
Responda
  • True
  • False

Questão 26

Questão
To retrieve data from the database, the run-time subsystem instructs the operating system to read data from the physical media.
Responda
  • True
  • False

Questão 27

Questão
The DBMS engine is involved in transaction management.
Responda
  • True
  • False

Questão 28

Questão
The run-time subsystem is responsible for locking, and backup and recovery within the database.
Responda
  • True
  • False

Questão 29

Questão
The database schema is a component of the DBMS engine.
Responda
  • True
  • False

Questão 30

Questão
A database schema defines a database’s structure – its tables, relationships, domains, and business rules.
Responda
  • True
  • False

Questão 31

Questão
A database schema is a set of values that a column can have.
Responda
  • True
  • False

Questão 32

Questão
A domain includes the physical format of an attribute and its uniqueness.
Responda
  • True
  • False

Questão 33

Questão
Business rules are restrictions on the business’s activities that need to be reflected in the database and database applications.
Responda
  • True
  • False

Questão 34

Questão
Business rules can always be enforced in the DBMS if the database is properly designed.
Responda
  • True
  • False

Questão 35

Questão
Some DBMS products use “stored procedures” to enforce business rules.
Responda
  • True
  • False

Questão 36

Questão
Once a database schema has been designed, the next step in creating a database is to define the relationships.
Responda
  • True
  • False

Questão 37

Questão
One disadvantage of declaring a relationship between two tables to the DBMS is that whenever those two tables are used in a form, query, or report the relationship must be declared again.
Responda
  • True
  • False

Questão 38

Questão
Identifiers that have no meaning to the users but are created only so that each row in a table will be uniquely identifiable to the DBMS are called foreign keys.
Responda
  • True
  • False

Questão 39

Questão
While most DBMS products support creating queries, few actually store the query as part of the application.
Responda
  • True
  • False

Questão 40

Questão
A criterion query is a query that has been constructed to accept criteria values at run-time.
Responda
  • True
  • False

Questão 41

Questão
A report can be used to enter data into the database as well as display data from the database.
Responda
  • True
  • False

Questão 42

Questão
Reports usually have a more complex structure than forms.
Responda
  • True
  • False

Questão 43

Questão
Menus can be used to control user access to forms, reports, and programs.
Responda
  • True
  • False

Questão 44

Questão
Menus can make application components more accessible to users, but at the cost of losing control over the users’ activities.
Responda
  • True
  • False

Questão 45

Questão
Database application programs must be written using a language that is specific to the DBMS.
Responda
  • True
  • False

Questão 46

Questão
Predefined program interfaces allow database application programs written in standard programming languages to interact with the DBMS.
Responda
  • True
  • False

Questão 47

Questão
Top-down development proceeds from the need to develop a specific system.
Responda
  • True
  • False

Questão 48

Questão
Studying the strategic goals of the organization and the information requirements necessary to achieve those goals is characteristic of top-down development.
Responda
  • True
  • False

Questão 49

Questão
Top-down development tends to produce useful systems more quickly than bottom-up development.
Responda
  • True
  • False

Questão 50

Questão
Bottom-up development produces systems with a global perspective requiring fewer modifications as additional systems are built.
Responda
  • True
  • False

Questão 51

Questão
Typically, users can clearly express their needs to the database developer.
Responda
  • True
  • False

Questão 52

Questão
Typically, database developers will start with the outputs that the users desire and work backward to infer the data model.
Responda
  • True
  • False

Questão 53

Questão
Development of multi-user databases, such as workgroup and organizational databases, is simplified because the developer has more potential sources for information.
Responda
  • True
  • False

Questão 54

Questão
Development of multi-user databases is especially difficult when the system is so large that no single user has a model of the complete structure.
Responda
  • True
  • False

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