Angel  Perez
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Angel  Perez
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Escoge Cap 1 y 2

Questão 1 de 66

1

Internet databases can store which types of data?

Selecione uma das seguintes:

  • pictures

  • audio

  • text

  • video

  • all of the above

Explicação

Questão 2 de 66

1

A program whose job is to store and retrieve user data in the database is called the __________.

Selecione uma ou mais das seguintes:

  • Database Modeling System

  • Database Management System

  • Data Business Model System

  • Relational Model Manager

  • Data Business Management Service

Explicação

Questão 3 de 66

1

Multi-user databases:

Selecione uma ou mais das seguintes:

  • allow more than one concurrent user

  • must keep one user’s work from interfering with another’s

  • allow each user to make changes independently

  • both a and b

  • both a and c

Explicação

Questão 4 de 66

1

The first applications of database technology were _______________.

Selecione uma ou mais das seguintes:

  • Internet databases

  • workgroup databases

  • organizational databases

  • personal databases

  • file-processing systems

Explicação

Questão 5 de 66

1

Which of the following is not a type of multi-user database?

Selecione uma ou mais das seguintes:

  • Internet databases

  • workgroup databases

  • organizational databases

  • personal databases

  • both a and d

Explicação

Questão 6 de 66

1

For database systems needing to support approximately 15 concurrent users within an organization, which type of database would be appropriate?

Selecione uma ou mais das seguintes:

  • Internet database

  • workgroup database

  • organizational database

  • personal database

  • none of the above

Explicação

Questão 7 de 66

1

Which of the following is not a characteristic of Internet databases?

Selecione uma ou mais das seguintes:

  • can support no more than 50 concurrent users

  • contain structured data

  • contain nonstructured data

  • application content is delivered via a standard browser

  • uses web-oriented technology to transfer data

Explicação

Questão 8 de 66

1

Which of the following is a technology that can be used in delivering data with an Internet database?

Selecione uma ou mais das seguintes:

  • FTP

  • SMTP

  • XML

  • PTL

  • HTP

Explicação

Questão 9 de 66

1

In a database application processing system:

Selecione uma ou mais das seguintes:

  • the database application(s) interact(s) with the DBMS

  • the database application(s) access(es) the database data

  • the DBMS accesses the database data

  • a and b

  • a and c

Explicação

Questão 10 de 66

1

Which of the following is not a limitation of file-processing systems?

Selecione uma ou mais das seguintes:

  • Much data is duplicated.

  • Data integrity is high.

  • Application programs are dependent on file formats.

  • Data are separated and isolated.

  • All of the above are limitations of file-processing systems.

Explicação

Questão 11 de 66

1

In a file-processing system:

Selecione uma ou mais das seguintes:

  • the user interacts with the application

  • the user accesses the file data

  • the application accesses the file data

  • a and b

  • a and c

Explicação

Questão 12 de 66

1

When data are duplicated, the most serious problem is:

Selecione uma ou mais das seguintes:

  • storage space is wasted

  • data may be in different formats

  • the data may not be logically consistent

  • the files may be of different sizes

  • difficulty in representing the users’ perspectives

Explicação

Questão 13 de 66

1

In file-processing systems, the physical file formats are:

Selecione uma ou mais das seguintes:

  • contained in the metadata

  • contained in the application code

  • contained in the application metadata

  • contained in the DBMS

  • not needed by the application programs

Explicação

Questão 14 de 66

1

In file-processing systems, the physical file formats are dependent on:

Selecione uma ou mais das seguintes:

  • the language or product used to generate them

  • the type of data being stored

  • the DBMS

  • the size of the file

  • the user’s preference

Explicação

Questão 15 de 66

1

As compared to file-processing systems, database processing systems:

Selecione uma ou mais das seguintes:

  • make application programming easier

  • maximize the impact of data format changes on application programs

  • provide users with direct access to data

  • both a and c

  • none of the above

Explicação

Questão 16 de 66

1

In database processing systems:

Selecione uma ou mais das seguintes:

  • all record formats are stored in the database

  • application programs need not include the format of the records or files they process

  • application programs need to know the length and data type of the data items they need from the database

  • the impact of data format changes on application programs is minimized

  • all of the above

Explicação

Questão 17 de 66

1

A database is considered “self-describing” because:

Selecione uma ou mais das seguintes:

  • all the users’ data is in one place

  • it reduces data duplication

  • it contains a description of its own structure

  • it contains a listing of all the programs that use it

  • all of the above

Explicação

Questão 18 de 66

1

The description of the structure of a database is called:

Selecione uma ou mais das seguintes:

  • user data

  • data dictionary

  • indexes

  • application metadata

  • application data

Explicação

Questão 19 de 66

1

The standard hierarchy of data, from smallest to largest, is as follows:

Selecione uma ou mais das seguintes:

  • bytes, characters, fields, records, files

  • bits, characters, fields, records, files

  • bits, characters, fields, files, records

  • bits, characters, records, databases, files

  • bits, characters, fields, files, databases

Explicação

Questão 20 de 66

1

A database contains:

Selecione uma ou mais das seguintes:

  • user data

  • metadata

  • indexes

  • application metadata

  • all of the above

Explicação

Questão 21 de 66

1

An index is used to:

Selecione uma ou mais das seguintes:

  • represent relationships among the data

  • describe the structure of the database itself

  • describe the application programs that use the database

  • describe the structure of a data entry form or report

  • a and c

Explicação

Questão 22 de 66

1

An index can be used to:

Selecione uma ou mais das seguintes:

  • document the structure of the database itself

  • improve the performance of the database

  • reduce data dependency for application programs

  • better represent the users’ perspectives of the data

  • all of the above

Explicação

Questão 23 de 66

1

When the structure of a data entry form or a report is part of a database, it is called:

Selecione uma ou mais das seguintes:

  • user data

  • metadata

  • indexes

  • application metadata

  • none of the above

Explicação

Questão 24 de 66

1

A database is a model of:

Selecione uma ou mais das seguintes:

  • the actual business

  • the users’ model of the business

  • the programmers’ view of the business

  • reality as it relates to the business

  • all of the above

Explicação

Questão 25 de 66

1

The principal criterion for determining the level of detail incorporated in a database is:

Selecione uma ou mais das seguintes:

  • the number of sample forms available during the design process

  • the level of detail of the structure of the database

  • the level of detail that exists in the users’ minds

  • the degree of detail available in the metadata

  • none of the above

Explicação

Questão 26 de 66

1

Events that must be processed against the database are called _____________.

Selecione uma ou mais das seguintes:

  • instances

  • dynamics

  • representations

  • referrals

  • transactions

Explicação

Questão 27 de 66

1

Which of the following was not a factor in organizations’ interest in the initial development of database technology?

Selecione uma ou mais das seguintes:

  • organizations were producing data at phenomenal rates

  • data was difficult to manage with file-processing systems

  • new systems were becoming increasingly difficult to develop

  • the desire to separate and isolate data according to application programs

  • the desire to integrate data from different file systems

Explicação

Questão 28 de 66

1

Which of the following was not a disadvantage of early database technologies?

Selecione uma ou mais das seguintes:

  • inability to integrate data

  • database applications were unreliable

  • database application performance was slow

  • vulnerability of having a single point of failure for all data

  • b and c

Explicação

Questão 29 de 66

1

Which of the following is not an advantage of the relational model?

Selecione uma ou mais das seguintes:

  • data duplication is minimized

  • many processing errors can be eliminated

  • most users can obtain information from the database themselves

  • provides a standard way for specialists to structure and process databases

  • all of the above are advantages of the relational model

Explicação

Questão 30 de 66

1

Modern microcomputer DBMS products:

Selecione uma ou mais das seguintes:

  • are not truly relational

  • provide easy to use interfaces

  • have poor response time

  • are not true DBMS products

  • are really just programming languages with generalized file-processing capabilities

Explicação

Questão 31 de 66

1

Client-server database architecture:

Selecione uma ou mais das seguintes:

  • has one CPU involved in the processing of database applications

  • has many CPUs simultaneously involved in processing database applications

  • is a simple but less robust mode of database processing on a LAN

  • is the same as the multi-user architecture used on mainframe databases

  • both a and d

Explicação

Questão 32 de 66

1

The term “Internet database” refers to which of the following?

Selecione uma ou mais das seguintes:

  • any database joined with Internet technology to publish database data on the web

  • any database that uses HTTP to publish database data to any location

  • any database joined with XML to publish database data to any location

  • any database joined with DHTML and XML to publish database data to any location

  • all of the above

Explicação

Questão 33 de 66

1

Which of the following is not true about distributed databases?

Selecione uma ou mais das seguintes:

  • They can combine personal, workgroup, and organizational databases.

  • They are widely used by large international corporations.

  • They make it appear to each user that (s)he is the only user of the organizations’ data.

  • They are still dealing with issues of data security.

  • It is still unknown if truly distributed databases can meet the needs of day-to-day organizational processing.

Explicação

Questão 34 de 66

1

Business organizations have resisted adopting object-oriented database systems because:

Selecione uma ou mais das seguintes:

  • object-oriented programming uses simplified data structures that fit easily into relational databases

  • the cost of purchasing ODBMS packages is prohibitively high

  • the cost and risk of converting from relational databases to OBMS format is too high

  • most ODBMS products lack features and functions for business information applications

  • both c and d

Explicação

Questão 35 de 66

1

A relation:

Selecione uma ou mais das seguintes:

  • is a tree containing user data

  • is a table containing user data

  • contains records in columns

  • is always well structured

  • all of the above

Explicação

Questão 36 de 66

1

A relation:

Selecione uma ou mais das seguintes:

  • has columns containing attributes

  • has rows containing records

  • should contain information on only one topic

  • has columns containing fields

  • all of the above

Explicação

Questão 37 de 66

1

The process to convert a poorly structured relation into a well-structured relation is called ________.

Selecione uma ou mais das seguintes:

  • decomposition

  • structuration

  • transformation

  • transaction

  • normalization

Explicação

Questão 38 de 66

1

Which of the following would not be stored in system tables?

Selecione uma ou mais das seguintes:

  • user data

  • keys

  • stored procedures

  • lists of indexes

  • length of fields

Explicação

Questão 39 de 66

1

Which of the following is (are) considered “overhead data”?

Selecione uma ou mais das seguintes:

  • metadata

  • keys

  • linked lists

  • user data

  • application metadata

Explicação

Questão 40 de 66

1

An index is a type of ____________.

Selecione uma ou mais das seguintes:

  • database

  • metadata

  • stored procedure

  • overhead data

  • primary key

Explicação

Questão 41 de 66

1

Indexes can:

Selecione uma ou mais das seguintes:

  • assist in search operations

  • improve performance of sorting operations

  • slow performance of update operations

  • improve the accessibility of the database data

  • all of the above

Explicação

Questão 42 de 66

1

Application metadata can include the structure of all of the following except ______________.

Selecione uma ou mais das seguintes:

  • indexes

  • forms

  • queries

  • reports

  • application components

Explicação

Questão 43 de 66

1

The design tools subsystem of the DBMS usually provides ________________.

Selecione uma ou mais das seguintes:

  • tools for backup and recovery of the database

  • one or more programming languages

  • a DBMS engine

  • a component to process queries

  • a banded report

Explicação

Questão 44 de 66

1

The design tools subsystem of the DBMS typically includes tools for creating all of the following except ____________.

Selecione uma ou mais das seguintes:

  • forms

  • tables

  • reports

  • queries

  • engines

Explicação

Questão 45 de 66

1

Which DBMS subsystem is responsible for processing the application components?

Selecione uma ou mais das seguintes:

  • DBMS engine

  • schema subsystem

  • run-time subsystem

  • design tools subsystem

  • programming interfaces

Explicação

Questão 46 de 66

1

Which DBMS subsystem is responsible for receiving requests from the other components and translating them into commands for the operating system to read or write data on the physical media?

Selecione uma ou mais das seguintes:

  • DBMS engine

  • schema subsystem

  • run-time subsystem

  • design tools subsystem

  • programming interfaces

Explicação

Questão 47 de 66

1

The DBMS engine is directly involved in all of the following except _____________.

Selecione uma ou mais das seguintes:

  • locking

  • recovery

  • domains

  • backup

  • transaction management

Explicação

Questão 48 de 66

1

The database schema defines which of the following?

Selecione uma ou mais das seguintes:

  • domains

  • tables

  • relationships

  • business rules

  • all of the above

Explicação

Questão 49 de 66

1

Which of the following steps in creating a database would come first?

Selecione uma ou mais das seguintes:

  • define relationships

  • create tables

  • define the schema

  • generate the data entry form

  • format reports

Explicação

Questão 50 de 66

1

The set of values that a column can have is called the ___________.

Selecione uma ou mais das seguintes:

  • domain

  • business rules

  • schema

  • relation

  • uniqueness

Explicação

Questão 51 de 66

1

Business rules may be enforced by all of the following methods except ____________.

Selecione uma ou mais das seguintes:

  • by the DBMS

  • by the indexes

  • by stored procedures

  • by the application programs

  • all of the above can be used to enforce business rules

Explicação

Questão 52 de 66

1

____________ are constraints on user activities that must be enforced no matter how the data changes reach the DBMS.

Selecione uma ou mais das seguintes:

  • Domains

  • Business rules

  • Schema

  • Relationships

  • Keys

Explicação

Questão 53 de 66

1

When the primary key of one relation is placed into a second relation to define a relationship, the key is called a(n) ___________ in the second relation.

Selecione uma ou mais das seguintes:

  • primary key

  • secondary key

  • foreign key

  • duplicate key

  • surrogate key

Explicação

Questão 54 de 66

1

Which of the following is not considered part of a database application?

Selecione uma ou mais das seguintes:

  • tables

  • reports

  • application programs

  • forms

  • queries

Explicação

Questão 55 de 66

1

In a database application, data entry is typically done with a(n) _____________.

Selecione uma ou mais das seguintes:

  • report

  • metadata

  • query

  • form

  • table

Explicação

Questão 56 de 66

1

A surrogate key:

Selecione uma ou mais das seguintes:

  • represents an attribute of an entity in the users’ model

  • always appears as the first line of a banded report

  • can be used in queries, but not in tables

  • has no meaning to the users

  • all of the above

Explicação

Questão 57 de 66

1

Which of the following is not a means of expressing a query to a database?

Selecione uma ou mais das seguintes:

  • PBL

  • SQL

  • QBE

  • query by form

  • query by example

Explicação

Questão 58 de 66

1

A report:

Selecione uma ou mais das seguintes:

  • can be easier to design than a form since it is used only for displaying data

  • can be more difficult to design than a form because it usually has a more complex structure

  • is a formatted display of database data

  • both a and c

  • all of the above

Explicação

Questão 59 de 66

1

Menus can be used to:

Selecione uma ou mais das seguintes:

  • display database data

  • control the users’ activities

  • retrieve specific data from the database

  • update database data

  • express a query to the database

Explicação

Questão 60 de 66

1

Application programs:

Selecione uma ou mais das seguintes:

  • must be written in a language specific to the DBMS being used

  • can be used to enforce business rules

  • can use a predefined program interface to bypass the DBMS and access data directly

  • can not be written in standard programming languages

  • all of the above

Explicação

Questão 61 de 66

1

Which of the following is not true of application programs?

Selecione uma ou mais das seguintes:

  • may be written in a language specific to the DBMS being used

  • may be written in a standard programming language using a predefined program interface

  • may enforce business rules

  • interact with the DBMS to access database data

  • are always dependent on a set of forms and reports

Explicação

Questão 62 de 66

1

A prototype is:

Selecione uma ou mais das seguintes:

  • a completed database without any applications

  • a completed application without any database

  • created by the users to explain their model to the developers

  • a sample database and applications to represent aspects of the system

  • used only with top-down development

Explicação

Questão 63 de 66

1

Which of the following is not a characteristic of top-down development?

Selecione uma ou mais das seguintes:

  • involves a study of strategic goals

  • creates an abstract data model

  • identifies a number of systems to eventually be built

  • produces systems requiring little modification to interface with new systems

  • produces useful systems quickly

Explicação

Questão 64 de 66

1

Which of the following is a characteristic of bottom-up development?

Selecione uma ou mais das seguintes:

  • involves a study of strategic goals

  • begins with the need to develop a specific system

  • identifies a number of systems to eventually be built

  • produces systems requiring little modification to interface with new systems

  • often leads to analysis paralysis

Explicação

Questão 65 de 66

1

Capturing the users’ requirements typically involves all of the following except:

Selecione uma ou mais das seguintes:

  • making inferences

  • interviewing users

  • building prototypes

  • examining reports

  • all of the above

Explicação

Questão 66 de 66

1

Data modeling in a multi-user system is complicated because:

Selecione uma ou mais das seguintes:

  • conflicting models must be reconciled

  • no single user’s model includes the complete structure

  • the developers must document the logical union of different models

  • users’ models may be inconsistent with each other

  • all of the above

Explicação