ISQS 3348 Chapter 1 quiz

Application programs are responsible for creating, maintaining, and supporting database backup and recovery systems.

FALSE

In the general division of labor between database applications and the DBMS, the processing of forms is considered a DBMS task

FALSE

Personal DBMS products, such as Microsoft Access, create a clear distinction between the DBMS and the database application

FALSE

There is no reason for serious database developers to learn many aspects of database processing technology because DBMS products like Microsoft Access hide these aspects.

FALSE

) Most organizations create and use their own database management system (DBMS) products.

False

A database is a set of one or more computer programs that serves as an intermediary between the users and the database management system (DBMS).

False

Although users use database systems, they are not considered part of a database system.

False

An advantage of keeping data in lists is that if you add a new row of data to the list you will never have null values occurring for any data item in the row.

False

An advantage of keeping data in lists is that if you update a data value in one row of data in a list, other occurrences of the same data item in other rows will be automatically updated as well.

False

Microsoft Access 2010 uses the Access 2003 .mdb file format as the default file format for database files

False

SQL stands for Structural Question Language

False

Usually, a database table containing both rows and columns is designed to store data for exactly two themes

False

A relational database stores data in the form of lists

Fasle

What problems with storing data on two themes in a list are addressed by database technology?

First, data updates are simplified because the number of updates is reduced when data appears in more than one location in the list. Second, the possibility of incorrectly entering duplicate data is reduced. Third, the problem of inconsistently entering data values is removed. Finally, the ability to enter data on one theme in the list without having data for the other theme is enhanced.

) In relational databases, query requests use a language called ________.

Structured Query Language (SQL)

In the general division of labor between database applications and the DBMS, the application program determines which tables need to be modified.

TRUE

Microsoft Access 2010 is a personal database that combines a DBMS with an application generator.

TRUE

The Microsoft Access 2010 application generator provides the ability to create and store forms, reports, and queries.

TRUE

the general division of labor between database applications and the DBMS, the application program formats the results of a query into a report.

TRUE

A possible problem with keeping data in lists is that if you delete a row of data from a list you may also delete some data items that you want to keep.

True

A relational database can be defined as a self-describing collection of related tables.

True

By separating data into tables containing data on only one theme each, making changes to the data is simplified

True

One problem with storing duplicated data is the potential for inconsistent values.

True

Relational database tables are commonly combined, queried, and processed using Structured Query Language (SQL).

True

The DBMS is used to create the database itself.

True

The DBMS receives data update requests from the application program

True

The purpose of a database is to help people keep track of things

True

All of the following are among functions of a DBMS except: a. Read database data b. Enforce application c. Modify database data (insert, update and delete) d. Perform backup and recovery

b. Enforce application

Microsoft Access 2010 uses the AutoNumber data type to create surrogate keys.

true

The default file format for Microsoft Access 2013 database files is the: A) Access 2007 format. B) Access 2003 format. C) Access XP format. D) SQL Server format. E) XBD format.

A) Access 2007 format.

Which of the following is a function of the database application in a database system? A) Create and transmit queries B) Update database data C) Maintain database structures D) Create tables E) Backup and restore data

A) Create and transmit queries

The DBMS controls ________ by ensuring that one user's work does not inappropriately interfere with another user's work.

concurrency

) Microsoft Access is considered a "personal database" product. What is a personal database?

A personal database combines a DBMS with an application generator. The DBMS performs the functions expected of a DBMS such as database creation, processing, and administration. The application generator adds the ability to create and store forms, reports and queries, as well as some other application related functions

What are "referential integrity constraints"? Give an example

A referential integrity constraint is a rule that restricts certain actions on the database data. A referential integrity constraint is used to ensure that the values in a field in one table have matching tables in a corresponding field in another table. These constraints are enforced by the DBMS, which will not allow changes to the values of the database that would result in violations of this rule. For example, a database has an EMPLOYEE table and a VEHICLE table that are used to store data on employees and the vehicles that they are assigned to drive. The EMPLOYEE table has a column called EmployeeID that is used to distinguish one employee record from another. The VEHICLE table also has an EmployeeID column that is used to associate a vehicle with the appropriate employee. A referential integrity constraint could be used to prevent a vehicle from being assigned to an employee with an EmployeeID that does not appear in the EMPLOYEE table by requiring that all values in EmployeeID in the VEHICLE table have a matching value in EmployeeID in the EMPLOYEE table.

What is a surrogate key and how does Microsoft Access 2010 create surrogate keys?

A surrogate key is usually a computer-generated unique number that serves as the identifier of each row in a table. Microsoft Access 2010 generates surrogates keys by using the Access AutoNumber data type.

A relational database is: A) a self-describing collection of related tables. B) a collection of forms and reports that support a given purpose. C) a library of queries and data files for querying. D) a set of applications and the data sets for those applications. E) a set of metadata.

A) a self-describing collection of related tables.

A database system has four components. Circle the ones that MS Access combines: A. Database application B. Database C. Users D. DBMS

A. Database application D. DBMS

What Microsoft Access file format is used by default in Microsoft Access 2010?

Answer: By default, Microsoft Access 2010 supports Access 2007 files formats. Microsoft Access 2007 database files are stored using the .accdb file extension.

What problems with storing data on two themes in a list are addressed by database technology?

Answer: First, data updates are simplified because the number of updates is reduced when data appears in more than one location in the list. Second, the possibility of incorrectly entering duplicate data is reduced. Third, the problem of inconsistently entering data values is removed. Finally, the ability to enter data on one theme in the list without having data for the other theme is enhanced.

Briefly describe the four components of a database system

Answer: The components of a database system are: (1) the users, (2) the application programs, (3) the DBMS, and (4) the database. The users are the people that will employ the system to input new data, modify existing data, and delete data in order to perform their jobs. The application programs are computer programs that act as intermediaries between the users and the DBMS. The application programs produce forms, reports, and queries; and they translate user actions into data management requests for the DBMS. The DBMS manipulates the database. It receives data management requests from the computer applications and translates them into read and write commands for the database. The database contains the actual user data that the users need to perform their jobs

What components are included in a database?

Answer: The database contains user data, metadata, indexes and other overhead data, and application metadata. User data is the data from the user's environment that they want to track. Metadata is data about the structure of the database. Indexes and other overhead data are structures that the database uses to improve performance. Finally, the application metadata is data about forms, reports, and other application components that some databases, particularly those created with desktop DBMS products, store with the database.

In a database system, the ________ creates and processes forms.

Answer: database application

Data that the database keeps about its own structure is called ________.

Answer: metadata

) Which of the following is not a function of the database application in a database system? A) Execute application logic B) Control concurrency C) Create and process forms D) Create and transmit queries E) Create and process reports

B) Control concurrency

Microsoft SQL Server is an example of a: A) database. B) database management system. C) data manipulation system. D) table. E) list manager

B) database management system.

Microsoft Access is a personal database system, and a personal database system is characterized by: A) the DBMS removing the metadata from the database. B) the DBMS product taking the role of the DBMS and the database application generator. C) the database being stored inside the DBMS. D) the DBMS product being limited to a maximum of ten tables in any given database. E) the DBMS not supporting indexes

B) the DBMS product taking the role of the DBMS and the database

Which of the following applications have necessitated the use of NoSQL? A. ERP application (Enterprise resource planning) B. Web 2.0 application C. Email Services D. CRM application (Customer Relationship Manager

B. Web 2.0 application

) Microsoft Access 2013 database files are stored using the file extension: A) .adb. B) .asp. C) .accdb. D) .mdb. E) .sql.

C) .accdb.

The creation of a database and its tables is a function of which component of the database system? A) Users B) Application C) DBMS D) Database E) Web server

C) DBMS

SQL stands for: A) Standard Query Language. B) Structural Question Language. C) Structured Query Language. D) Standard Question Language. E) Structured Question Language.

C) Structured Query Language.

The Microsoft Access application generator is not responsible for: A) creating forms. B) creating reports. C) creating queries. D) creating tables. E) storing queries.

D) creating tables.

Which of the following is a function of the DBMS in a database system? A) Create and transmit queries B) Control applications C) Create and process forms D) Perform backup and recover E) Process Web page requests

D) Perform backup and recover

A relational database stores data in the form of: A) lists. B) forms. C) columns. D) tables. E) spreadsheets.

D) tables.

Today almost every commercial database is based on: A) lists. B) the hierarchical model. C) the linked-list model. D) the relational model. E) the object-oriented model

D) the relational model.

The purpose of the ________ in a database system is to receive requests from applications and to translate those requests into reads and writes on the database files.

DBMS

A database may be used to help people: A) track which student is assigned to a particular advisor. B) know the current inventory levels of products their company sells. C) check on the estimated arrival time of an incoming flight at an airport. D) look up their checking account balance over the Internet. E) All of the above

E) All of the above

Which of the following problems associated with storing data in a list is avoided by storing data in a relational database? A) Maintaining the data may require changing the same data value in many locations B) Inconsistency when a data item is used multiple times C) Inability to store partial data D) Duplication of data items E) All of the above

E) All of the above

Which of the following would not be an example of database metadata? A) Names of tables in a database B) Properties of tables in a database C) Names of columns in a database and their associated tables D) Properties of columns E) Queries against records in the database tables

E) Queries against records in the database tables

The component of a database that makes it self-describing is the: A) related tables. B) applications. C) library. D) data set. E) metadata.

E) metadata.

What is "metadata" and how does it relate to the definition of a database?

Metadata is data about the structure of the database itself. This includes data about the names of all the tables in the database, the names of all the columns in each of the tables, the data type of each column in each table, the properties of the tables and the columns, etc. Metadata accounts for the "self-describing" aspect of the definition of a database as a "self-describing

________ constraints are rules that the DBMS enforces to ensure that data values in one table have corresponding values in another related table.

Referential integrity

what does RDBMS stand for?

Relational Database Management Systems

Briefly describe the function of the DBMS in a database system.

The DBMS creates the database and the tables and structures within it. The DBMS also reads and updates the database data. It receives requests from application programs to perform data maintenance tasks. These requests are translated into actions that are performed on the database. In addition to maintaining the user data within the database, the DBMS also maintains the database structures. The DBMS also enforces any rules that have been defined to govern the values of the data, such as data type requirements and referential integrity constraints. The DBMS controls concurrency issues, which deal with the unwanted interruption of one user's work by another user's work. As the only point of entry into the database, the DBMS also provides security for the database to restrict users' access to only the data that they have authority to read or modify. Finally, the DBMS is responsible for the creation of backup copies of the database data and for restoring the database in case a recovery is required.

What are the advantages and disadvantages of personal DBMS products hiding the complexity of database systems?

The advantage of hiding the complexity of database systems is that it makes database systems easier for novices to create. Using the graphical tools and wizards of a desktop DBMS product, databases and application programs can be created without developing much database expertise. The disadvantage of hiding the complexity is that the developer does not understand what the desktop DBMS product is doing on the developer's behalf. This limits the developer's ability to create systems with functions not anticipated by the DBMS design team. Further, the developer is limited in their ability to develop systems on a larger scale.

Briefly describe the function of an application program in a database system

The application program is responsible for creating and processing forms. The application displays the form to the user, allows the user to complete the data entry, evaluates the form to determine which data management tasks need to be performed, and transmits the appropriate requests to the DBMS. The application creates and transmits queries. The queries are requests for data that are created in a language like SQL, and transmitted to the DBMS to have the requested data returned to the application program. The application also creates and processes reports. The query to retrieve the necessary data for the report is sent to the DBMS. When the DBMS returns the needed data, the application manipulates it as necessary to create the requested report. The application program also applies application logic to control the manipulation of data in accordance with the business rules. Finally, the application program is responsible for providing control. Control must be exercised to allow the users to make choices for functions and tasks as appropriate for their jobs. Also, control must be exercised to manage the activities of the DBMS.

A(n) ________ is a set of one or more computer programs that serves as an intermediary between the user and the DBMS

database application

Metadata is the user data stored in the database.

false

Referential integrity constraints must be enforced by the application program.

false

The Microsoft Access application generator adds the ability to create and store ________, ________, and ________.

forms; reports; queries

The purpose of a database is to help people ________.

keep track of things

It is almost always best to design a table in a database so that it contains data on ________ theme

one

Microsoft Access is a(n) ________, which combines a DBMS and an application generator

personal database

A relational database stores data in the form of ________.

tables