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Nothing is impossible!
Angel Perez
Quiz von Angel Perez, aktualisiert more than 1 year ago
Angel Perez
Erstellt von Angel Perez vor mehr als 7 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
Internet databases can store which types of data?
Antworten
  • pictures
  • audio
  • text
  • video
  • all of the above

Frage 2

Frage
A program whose job is to store and retrieve user data in the database is called the __________.
Antworten
  • Database Modeling System
  • Database Management System
  • Data Business Model System
  • Relational Model Manager
  • Data Business Management Service

Frage 3

Frage
Multi-user databases:
Antworten
  • 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

Frage 4

Frage
The first applications of database technology were _______________.
Antworten
  • Internet databases
  • workgroup databases
  • organizational databases
  • personal databases
  • file-processing systems

Frage 5

Frage
Which of the following is not a type of multi-user database?
Antworten
  • Internet databases
  • workgroup databases
  • organizational databases
  • personal databases
  • both a and d

Frage 6

Frage
For database systems needing to support approximately 15 concurrent users within an organization, which type of database would be appropriate?
Antworten
  • Internet database
  • workgroup database
  • organizational database
  • personal database
  • none of the above

Frage 7

Frage
Which of the following is not a characteristic of Internet databases?
Antworten
  • 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

Frage 8

Frage
Which of the following is a technology that can be used in delivering data with an Internet database?
Antworten
  • FTP
  • SMTP
  • XML
  • PTL
  • HTP

Frage 9

Frage
In a database application processing system:
Antworten
  • 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

Frage 10

Frage
Which of the following is not a limitation of file-processing systems?
Antworten
  • 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.

Frage 11

Frage
In a file-processing system:
Antworten
  • the user interacts with the application
  • the user accesses the file data
  • the application accesses the file data
  • a and b
  • a and c

Frage 12

Frage
When data are duplicated, the most serious problem is:
Antworten
  • 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

Frage 13

Frage
In file-processing systems, the physical file formats are:
Antworten
  • contained in the metadata
  • contained in the application code
  • contained in the application metadata
  • contained in the DBMS
  • not needed by the application programs

Frage 14

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

Frage 15

Frage
As compared to file-processing systems, database processing systems:
Antworten
  • 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

Frage 16

Frage
In database processing systems:
Antworten
  • 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

Frage 17

Frage
A database is considered “self-describing” because:
Antworten
  • 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

Frage 18

Frage
The description of the structure of a database is called:
Antworten
  • user data
  • data dictionary
  • indexes
  • application metadata
  • application data

Frage 19

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

Frage 20

Frage
A database contains:
Antworten
  • user data
  • metadata
  • indexes
  • application metadata
  • all of the above

Frage 21

Frage
An index is used to:
Antworten
  • 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

Frage 22

Frage
An index can be used to:
Antworten
  • 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

Frage 23

Frage
When the structure of a data entry form or a report is part of a database, it is called:
Antworten
  • user data
  • metadata
  • indexes
  • application metadata
  • none of the above

Frage 24

Frage
A database is a model of:
Antworten
  • 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

Frage 25

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

Frage 26

Frage
Events that must be processed against the database are called _____________.
Antworten
  • instances
  • dynamics
  • representations
  • referrals
  • transactions

Frage 27

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

Frage 28

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

Frage 29

Frage
Which of the following is not an advantage of the relational model?
Antworten
  • 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

Frage 30

Frage
Modern microcomputer DBMS products:
Antworten
  • 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

Frage 31

Frage
Client-server database architecture:
Antworten
  • 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

Frage 32

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

Frage 33

Frage
Which of the following is not true about distributed databases?
Antworten
  • 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.

Frage 34

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

Frage 35

Frage
A relation:
Antworten
  • is a tree containing user data
  • is a table containing user data
  • contains records in columns
  • is always well structured
  • all of the above

Frage 36

Frage
A relation:
Antworten
  • has columns containing attributes
  • has rows containing records
  • should contain information on only one topic
  • has columns containing fields
  • all of the above

Frage 37

Frage
The process to convert a poorly structured relation into a well-structured relation is called ________.
Antworten
  • decomposition
  • structuration
  • transformation
  • transaction
  • normalization

Frage 38

Frage
Which of the following would not be stored in system tables?
Antworten
  • user data
  • keys
  • stored procedures
  • lists of indexes
  • length of fields

Frage 39

Frage
Which of the following is (are) considered “overhead data”?
Antworten
  • metadata
  • keys
  • linked lists
  • user data
  • application metadata

Frage 40

Frage
An index is a type of ____________.
Antworten
  • database
  • metadata
  • stored procedure
  • overhead data
  • primary key

Frage 41

Frage
Indexes can:
Antworten
  • 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

Frage 42

Frage
Application metadata can include the structure of all of the following except ______________.
Antworten
  • indexes
  • forms
  • queries
  • reports
  • application components

Frage 43

Frage
The design tools subsystem of the DBMS usually provides ________________.
Antworten
  • tools for backup and recovery of the database
  • one or more programming languages
  • a DBMS engine
  • a component to process queries
  • a banded report

Frage 44

Frage
The design tools subsystem of the DBMS typically includes tools for creating all of the following except ____________.
Antworten
  • forms
  • tables
  • reports
  • queries
  • engines

Frage 45

Frage
Which DBMS subsystem is responsible for processing the application components?
Antworten
  • DBMS engine
  • schema subsystem
  • run-time subsystem
  • design tools subsystem
  • programming interfaces

Frage 46

Frage
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?
Antworten
  • DBMS engine
  • schema subsystem
  • run-time subsystem
  • design tools subsystem
  • programming interfaces

Frage 47

Frage
The DBMS engine is directly involved in all of the following except _____________.
Antworten
  • locking
  • recovery
  • domains
  • backup
  • transaction management

Frage 48

Frage
The database schema defines which of the following?
Antworten
  • domains
  • tables
  • relationships
  • business rules
  • all of the above

Frage 49

Frage
Which of the following steps in creating a database would come first?
Antworten
  • define relationships
  • create tables
  • define the schema
  • generate the data entry form
  • format reports

Frage 50

Frage
The set of values that a column can have is called the ___________.
Antworten
  • domain
  • business rules
  • schema
  • relation
  • uniqueness

Frage 51

Frage
Business rules may be enforced by all of the following methods except ____________.
Antworten
  • by the DBMS
  • by the indexes
  • by stored procedures
  • by the application programs
  • all of the above can be used to enforce business rules

Frage 52

Frage
____________ are constraints on user activities that must be enforced no matter how the data changes reach the DBMS.
Antworten
  • Domains
  • Business rules
  • Schema
  • Relationships
  • Keys

Frage 53

Frage
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.
Antworten
  • primary key
  • secondary key
  • foreign key
  • duplicate key
  • surrogate key

Frage 54

Frage
Which of the following is not considered part of a database application?
Antworten
  • tables
  • reports
  • application programs
  • forms
  • queries

Frage 55

Frage
In a database application, data entry is typically done with a(n) _____________.
Antworten
  • report
  • metadata
  • query
  • form
  • table

Frage 56

Frage
A surrogate key:
Antworten
  • 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

Frage 57

Frage
Which of the following is not a means of expressing a query to a database?
Antworten
  • PBL
  • SQL
  • QBE
  • query by form
  • query by example

Frage 58

Frage
A report:
Antworten
  • 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

Frage 59

Frage
Menus can be used to:
Antworten
  • display database data
  • control the users’ activities
  • retrieve specific data from the database
  • update database data
  • express a query to the database

Frage 60

Frage
Application programs:
Antworten
  • 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

Frage 61

Frage
Which of the following is not true of application programs?
Antworten
  • 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

Frage 62

Frage
A prototype is:
Antworten
  • 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

Frage 63

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

Frage 64

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

Frage 65

Frage
Capturing the users’ requirements typically involves all of the following except:
Antworten
  • making inferences
  • interviewing users
  • building prototypes
  • examining reports
  • all of the above

Frage 66

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