Acc 250 - 4

Creating an empty table in a relational database requires use of the ________, and populating that table requires the use of ________. A) DDL; DML B) DQL; SQL C) DDL; DQL D) DML; DDA

a

If a national sales tax were implemented, which language would be used to add a new field in the sales table to track the sales tax due? A) Data Definition Language B) Data Manipulation Language C) Data Query Language D) Data Update Language

a

In a relational database, requiring that every record in a table have a unique identifier is called the A) entity integrity rule. B) referential integrity rule. C) unique primary key rule. D) foreign key rule.

a

In a well-designed and normalized database, which of the following attributes would be a foreign key in a cash receipts table? A) Customer number B) Cash receipt date C) Remittance advice number D) Customer check number

a

In a well-structured relational database, A) every table must be related to at least one other table. B) every table must be related to all other tables. C) one table must be related to at least one other table. D) one table must be related to all other tables.

a

The abstract representation of the contents of a database is called the A) logical data model. B) data dictionary. C) physical view. D) schema.

a

The data dictionary usually is maintained A) automatically by the DBMS. B) by the database administrator. C) by the database programmers. D) by top management.

a

The delete anomaly A) may result in unintentional loss of important data. B) is usually easily detected by users. C) restricts the addition of new records. D) prevents users from deleting outdated data from records or tables.

a

The feature in many database systems that simplifies the creation of reports by allowing users to specify the data elements desired and the format of the output. is named the A) report writer. B) report generator. C) report creator. D) report printer.

a

The potential inconsistency that could occur when there are multiple occurrences of a specific data item in a database is called the A) update anomaly. B) insert anomaly. C) inconsistency anomaly. D) delete anomaly.

a

The problem of changes (or updates) to data values in a database being incorrectly recorded is known as A) an update anomaly. B) an insert anomaly. C) a delete anomaly. D) a memory anomaly.

a

The update anomaly in file-based systems or unnormalized database tables A) occurs because of data redundancy. B) restricts addition of new fields or attributes. C) results in records that cannot be updated. D) is usually easily detected by users.

a

When the human resources manager wants to gather data about vacation and personal day usage by employees and by departments, the manager would use which language? A) Data Query Language B) Data Manipulation Language C) Data Report Language D) Data Definition Language

a

Which statement below concerning the database management system (DBMS) is false? A) The DBMS automatically creates application software for users, based on data dictionary parameters. B) The DBMS automatically maintains the data dictionary. C) Users' requests for information are transmitted to the DBMS through application software. D) The DBMS uses special languages to perform specific functions.

a

Which would not generally be considered a data dictionary output report? A) A list of cash balances in the organization's bank accounts B) A list of all programs in which a data element is used C) A list of all synonyms for the data elements in a particular file D) A list of all data elements used by a particular user

a

A relational database in which customer data is not maintained independently of sales invoice data will most likely result in A) an update anomaly. B) an insert anomaly. C) a delete anomaly. D) an integrity anomaly.

b

All of the following are benefits of the database approach except: A) Data integration and sharing B) Decentralized management of data C) Minimal data redundancy D) Cross-functional analysis and reporting

b

In a well-structured database, the constraint that ensures the consistency of the data is known as the A) entity integrity rule. B) referential integrity rule. C) logical view. D) consistency integrity rule.

b

Inability to add new data to a database without violating the basic integrity of the database is referred to as the A) update anomaly. B) insert anomaly. C) integrity anomaly. D) delete anomaly.

b

The ________ contains information about the structure of the database. A) data definition language B) data dictionary C) data warehouse D) database management system

b

The database requirement that foreign keys must be null or have a value corresponding to the value of a primary key in another table is formally called the A) entity integrity rule. B) referential integrity rule. C) rule of keys. D) foreign key rule.

b

The logical structure of a database is described by the A) data dictionary. B) schema. C) database management system. D) internal level.

b

The person responsible for the database is the A) data coordinator. B) database administrator. C) database manager. D) database master.

b

Which of the following would not be found in a data dictionary entry for a data item? A) records containing a specific data item B) physical location of the data C) source of the data item D) field type

b

Which statement is true regarding file systems? A) Transaction files are similar to ledgers in a manual AIS. B) Multiple master files create problems with data consistency. C) Transaction files are permanent. D) Individual records are never deleted in a master file.

b

A low-level view of the database that describes how the data are actually stored and accessed is the A) conceptual-level schema. B) subschema. C) internal-level schema. D) external-level schema.

c

A set of individual user views of the database is called the A) conceptual-level schema. B) internal-level schema. C) external-level schema. D) meta-schema.

c

Identify the aspect of a well-structured database that is incorrect. A) Data is consistent. B) Redundancy is minimized and controlled. C) All data is stored in one table or relation. D) The primary key of any row in a relation cannot be null.

c

In the database design approach known as normalization, the first assumption made about data is A) there is no redundancy in the data. B) the delete anomaly will not apply since all customer records will be maintained indefinitely. C) everything is initially stored in one large table. D) the data will not be maintained in 3NF tables.

c

Record layouts, definitions, addresses, and indexes will be stored at the ________ level schema. A) external B) conceptual C) internal D) meta

c

The ________ acts as an interface between the database and the various application programs. A) data warehouse B) database administrator C) database management system D) database system

c

The ________ handles the link between the way data are physically stored and each user's logical view of that data. A) data warehouse B) data dictionary C) database management (DBMS) software D) schema

c

The combination of the database, the DBMS, and the application programs that access the database through the DBMS is referred to as the A) data warehouse. B) database administrator. C) database system. D) database manager.

c

The physical view of a database system refers to A) how a user or programmer conceptually organizes and understands the data. B) how the DBMS accesses data for a certain application program. C) how and where the data are physically arranged and stored. D) how master files store data values used by more than one application program.

c

The problem of losing desired information from a database when an unwanted record is purged from the database is referred to as the ________ anomaly. A) purge B) erase C) delete D) integrity

c

The schema that provides an organization-wide view of the entire database is known as the A) external-level schema. B) internal-level schema. C) conceptual-level schema. D) logical view of the database.

c

Using a file-oriented approach to data and information, data is maintained in A) a centralized database. B) many interconnected files. C) many separate files. D) a decentralized database.

c

File-oriented approaches create problems for organizations because of A) multiple transaction files. B) a lack of sophisticated file maintenance software. C) multiple users. D) multiple master files.

d

Reports produced using the data dictionary could include all of the following except a list of A) programs where a data item is used. B) synonyms for the data items in a particular file. C) outputs where a data element is used. D) the schemas included in a database

d

The database design method in which a designer uses knowledge about business processes to create a diagram of the elements to be included in the database is called A) normalization. B) decentralization. C) geometric data modeling. D) semantic data modeling.

d

Which statement below is false regarding the basic requirements of the relational data model? A) Every column in a row must be single-valued. B) All non-key attributes in a table should describe a characteristic about the object identified by the primary key. C) Foreign keys, if not null, must have values that correspond to the value of a primary key in another table. D) Primary keys can be null.

d