Given the basic ER and relational models, which of the following is INCORRECT?

A An attribute of an entity can have more than one value
B An attribute of an entity can be composite
C In a row of a relational table, an attribute can have more than one value
D In a row of a relational table, an attribute can have exactly one value or a NULL value

Correct Answer: In a row of a relational table, an attribute can have more than one value

It is possible to have several values for a single attribute provide it is a multi-valued attribute.
Bissoy MCQ
#Database #Entity-Relationship Design Issues

Related Questions

what is the monthly salary of Rahman ? Statements : 1. Rahman's basic salary is Tk. 100 more Rajan's salary who also serves in Rahman's company. 2. Other allowances drawn by Rajan besides his basic salary are Tk. 2,000 per month which is TK. 50 less than Rahan's salary . 3. Rajan's basic salary is TK. 1550 per month.
A Only II
B Only II and III
C Only I and II
D All I , II and II
Which of the following are objective database and not a relational database?
A Web SQL Database
B FileSystem API
C IndexedDB
D User data
Datasets which reside on the user's hard drive are created by ADO.NET to facilitate the transformation of XML documents to and from relational database constructs.
A True
B False
ODBC provides an interface by which Web server programs can access and process relational data sources in a DBMS-independent manner.
A True
B False
In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is
A Assignment, relational, arithmetic
B Relational, assignment, arithmetic
C Arithmetic, assignment, relational
D Arithmetic, relational, assignment
An enterprise data model is a relational model that shows the high-level entities for the organization and associations among those entities.
A True
B False
Which of the following is not a relational database?
A 4th Dimension
B Reflex
C dBASE IV
D FoxPro
Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM?
A IDMS
B DB2
C dBase-II
D R:base
Which of the following products was the first to implement true relational algebra in a PC DBMS?
A IDMS
B Oracle
C dBase-II
D R:base
Which of the following is not characteristic of a relational database model?
A tables
B treelike structure
C complex logical relationships
D records
E None of the above

Next steps