Database participation 2

Weak entity set is represented as

• Underline

• Double line

• Double diamond

• Double rectangle

Double oval represents----------

• Derived Attribute

• Multi-valued Attribute

• Composite Attribute

• Simple Attribute

Dashed oval represents----------

• Derived Attribute

• Multi-valued Attribute

• Composite Attribute

• Simple Attribute

Which is the subset of SQL commands used to manipulate Database structures?

• Data Definition Language(DDL)

• Data Manipulation Language(DML)

• Data Control Language(DCL)

• DML and DDL

Which of the following is/are the DDL statements?

• Create

• Drop

• Alter

• Update

Command that is used to add attributes to an existing relation, is said to be

• Update

• Alter

• Modify

• Change

A PRIMARY KEY allows a single row to contain NULL

• True

• False

The attributes which made up of more than one single attribute.

• Multi-value Attribute

• Derived Attribute

• Single value Attribute

• Composite Attribute

The attribute Age is?

• Single valued

• Derived

• Composite

• Multi-valued

Which of the following is the multi-valued attribute.

• Age

• Name

• Qualification

• Date of birth