Database Management Systems Quiz

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Questions and Answers

The DBMS acts as an interface between what two components of an enterprise-class database system?

Database application and the database (correct)
Data and the database
The user and the database application
Database application and SQL

Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM?

dBase-II
IDMS
R:base
DB2 (correct)

The following are components of a database except ________.

reports

An application where only one user accesses the database at a given time is an example of a(n) ________.

single-user database application Signup and view all the answers

An on-line commercial site such as Amazon.com is an example of a(n) ________.

e-commerce database application Signup and view all the answers

Which of the following products was the first to implement true relational algebra in a PC DBMS?

Oracle (B) Signup and view all the answers

SQL stands for ________.

Structured Query Language Signup and view all the answers

Because it contains a description of its own structure, a database is considered to be ________.

self-describing Signup and view all the answers

The following are functions of a DBMS except ________.

creating and processing forms Signup and view all the answers

Helping people keep track of things is the purpose of a(n) ________.

database Signup and view all the answers

Which of the following products implemented the CODASYL DBTG model?

IDMS (B) Signup and view all the answers

An Enterprise Resource Planning application is an example of a(n) ________.

multiuser database application Signup and view all the answers

A DBMS that combines a DBMS and an application generator is ________.

Microsoft's Access (C) Signup and view all the answers

You have run an SQL statement that asked the DBMS to display data in a table named USER_TABLES. The results include columns of data labeled 'TableName,' 'NumberOfColumns,' and 'PrimaryKey.' You are looking at ________.

metadata Signup and view all the answers

Which of the following is not considered to be a basic element of an enterprise-class database system?

COBOL programs Signup and view all the answers

The DBMS that is most difficult to use is ________.

IBM's DB2 (C) Signup and view all the answers

Which of the following data constraints would be used to specify that the value of cells in a column must be one of a specific set of possible values?

A domain constraint (B) Signup and view all the answers

In a 1:N relationship, the foreign key is placed in:

the child table (B) Signup and view all the answers

Which of the following column properties specifies whether or not cells in a column must contain a data value?

Null status (D) Signup and view all the answers

A primary key should be defined as:

NOT NULL (B) Signup and view all the answers

Which of the following column properties would be used to specify that cells in a column must contain a monetary value?

Data type (B) Signup and view all the answers

Which of the following situation requires the use of ID-dependent entities?

All of the above use ID-dependent entities (D) Signup and view all the answers

A foreign key is:

a column containing the primary key of another table (A) Signup and view all the answers

Which of the following columns is(are) required in a table?

A primary key (A) Signup and view all the answers

Study Notes

Database Management Systems (DBMS)

Acts as an interface between database applications and databases, facilitating data interaction.
Functions include creating databases, processing data, and administrating databases.
Can combine DBMS and application generator, as seen in products like Microsoft's Access.

Relational Model and SQL

Early implementation by E.F. Codd at IBM led to DB2.
SQL stands for Structured Query Language, fundamental in querying databases.
First true relational algebra implementation for PC DBMS was by Oracle.

Database Components

Key components of a database are user data, metadata, reports, and indexes.
A database is considered self-describing as it contains its own structural description.

Types of Database Applications

Single-user database applications allow one user access at a time, in contrast to multiuser applications.
E-commerce applications, like Amazon.com, illustrate multiuser capabilities.
Enterprise Resource Planning applications are examples of multiuser database applications.

Data Constraints and Keys

Domain constraints specify valid values for data cells, ensuring data integrity.
In 1:N relationships, foreign keys are added to the child table.
Primary keys must be defined as NOT NULL, ensuring unique and identifiable records.

Entity Relationships

ID-dependent entities are required for archetype/instance relationships and multivalued attributes.
Foreign keys establish links between tables by holding primary keys from another table.

Essential Keys in Tables

A primary key is mandatory, while foreign keys are not strictly required.
Data types determine the nature of data held in a column, while null status specifies whether data values must be present.

Database Usability

Microsoft SQL Server and Oracle are often deemed more complex to use compared to Microsoft Access.

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Description

Test your knowledge on the key concepts of Database Management Systems (DBMS). This quiz covers essential components such as interfaces, early implementations of the relational model, and more. Perfect for students and professionals looking to solidify their understanding.