6038125
Beschreibung
Quiz von Angel Perez, aktualisiert more than 1 year ago
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Erstellt von Angel Perez
vor mehr als 8 Jahre
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It is the job of a program called a(n) [blank_start]database management system[blank_end] to store and retrieve data in database tables.
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database management system
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A single-user database that is used by only one person at a time is called a(n) [blank_start]personal[blank_end] database.
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personal
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A database that is used by more than one person at a time is called a(n) [blank_start]multi-user[blank_end] database.
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multi-user
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[blank_start]Organizational[blank_end] databases were the first applications of database technology.
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Organizational
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A(n) [blank_start]workgroup[blank_end] database is characterized by having 25 or fewer concurrent users and 100 megabytes or less data.
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workgroup
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In database processing systems, the data is directly accessed only by the [blank_start]database management system[blank_end].
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database management system
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In database application processing systems, the user interacts directly with the [blank_start]database application programs[blank_end].
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database application programs
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The first business information systems stored groups of records in separate files and were called [blank_start]file-processing systems[blank_end].
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file-processing systems
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The most serious problem with data duplication concerns [blank_start]data integrity[blank_end].
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data integrity
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A collection of data has [blank_start]integrity[blank_end] if it is logically consistent.
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integrity
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In file-processing systems, the [blank_start]physical format[blank_end] of files and records are part of the application code.
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physical format
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A(n) [blank_start]database[blank_end] is a self-describing collection of integrated records.
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database
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The description of the structure of a database is stored in the [blank_start]metadata[blank_end] , also known as the data dictionary or the data directory.
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metadata
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In the standard data hierarchy, a byte, or character, is composed of [blank_start]bits[blank_end] .
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bits
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In the standard data hierarchy, a field is composed of [blank_start]bytes[blank_end] .
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bytes
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In the standard data hierarchy, a record is composed of [blank_start]fields[blank_end] .
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fields
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In the standard data hierarchy, a file is composed of [blank_start]records[blank_end] .
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records
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A(n) [blank_start]index[blank_end] is used to represent relationships among the data and to improve the performance of database applications.
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index
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When the structure of a form or report is part of the database it is called [blank_start]application metadata[blank_end] .
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application metadata
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The database is a(n) [blank_start]dynamic[blank_end] model because businesses change.
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dynamic
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[blank_start]Transactions[blank_end] are representations of events that must be processed against the database.
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Transactions
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A database is a model of the [blank_start]users’[blank_end] model or view of the business.
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users’
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The [blank_start]relational[blank_end] database model stores data as tables, with rows and columns.
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relational
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In the relational model, the process of [blank_start]normalization[blank_end] is used to change an undesirable table into two or more desirable tables.
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normalization
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Originally, it was thought that the relational model would allow [blank_start]users[blank_end] to obtain their own information from databases.
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users
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One impact of the movement of database technology from mainframes to microcomputers was the dramatic improvement in DBMS [blank_start]user interfaces[blank_end] .
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user interfaces
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The use of multiple CPUs in processing database applications in LAN-based multi-user database architecture produced greater [blank_start]performance[blank_end] .
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performance
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Of the two types of LAN-based multi-user database processing, [blank_start]client-server database architecture[blank_end] is the more complex and robust.
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client-server database architecture
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Of the two types of LAN-based multi-user database processing, [blank_start]file-sharing architecture[blank_end] is the simpler and less robust.
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file-sharing architecture
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A(n) [blank_start]distributed[blank_end] database is logically integrated but physically located in more than one place.
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distributed
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Object-oriented database systems developed to handle the structures processed by [blank_start]object-oriented programming[blank_end] .
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object-oriented programming
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The database is processed by the [blank_start]Database Management System[blank_end] , which is used by both users and developers.
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Database Management System
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Today, most databases represent user data in [blank_start]relations[blank_end] , which are tables of data.
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relations
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In a table of users’ data, the columns contain [blank_start]fields[blank_end].
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fields
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The process of [blank_start]normalization[blank_end] is used to change poorly structured tables into well-structured ones.
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normalization
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Most DBMS products store metadata in tables, sometimes called [blank_start]system tables[blank_end] .
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system tables
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One advantage to storing metadata in tables is that [blank_start]developers[blank_end] can use the same tools to query the metadata as they do to query the users’ data.
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developers
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A type of database data that consists primarily of indexes is called [blank_start]overhead data[blank_end] .
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overhead data
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Overhead data typically includes indexes and sometimes [blank_start]linked lists[blank_end] .
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linked lists
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Indexes are useful for [blank_start]sorting[blank_end] and search operations.
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sorting
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The structure and format of user forms, reports, and other application components are stored in the database as [blank_start]application metadata[blank_end] .
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application metadata
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The [blank_start]design tools[blank_end] subsystem contains tools to facilitate the creation of the database.
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design tools
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The [blank_start]run-time[blank_end] subsystem processes the application components created using the design tools
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run-time
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The DBMS engine is the intermediary between the other DBMS components and the [blank_start]data[blank_end] .
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data
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The DBMS engine receives requests from the other DBMS components and translates them into commands for the [blank_start]operating system[blank_end] to read or write data from the physical media.
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operating system
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A database [blank_start]schema[blank_end] defines a database’s structure – its tables, relationships, domains, and business rules.
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schema
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A database schema is a(n) [blank_start]design[blank_end] .
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design
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A(n) [blank_start]domain[blank_end] is a set of values that a column may have.
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domain
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[blank_start]Business rules[blank_end] are restrictions on the business’s activities that need to be reflected in the database and database applications.
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Business rules
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A primary key from one table that is placed into another table to declare a relationship is called a(n) [blank_start]foreign key[blank_end] in the second table.
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foreign key
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[blank_start]Surrogate keys[blank_end] are identifiers that are created only to allow each row in a table to be uniquely identified and have no meaning to the users.
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Surrogate keys
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Queries can be expressed to the database using the data access language called [blank_start]SQL[blank_end] .
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SQL
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QBE, which stands for [blank_start]query by example[blank_end] , is a means of expressing a query to the database.
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query by example
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Queries can be [blank_start]parameterized[blank_end] , meaning that they are constructed to accept a criteria value at the time they are run.
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parameterized
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A means of expressing a query to the database called [blank_start]query by form[blank_end] allows the user to enter query constraints on a data entry form.
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query by form
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A(n) [blank_start]report[blank_end] is a formatted display of data.
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report
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[blank_start]Menus[blank_end] are used to organize application components to make them more accessible to the end user and to provide control over the users’ activities.
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Menus
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