RDBMS_4

Which of the following represents a tuple?

• Column of a table

• Two dimensional table

• Row of a table

• Key of a table

Which notation represents an attribute in an E-R diagram?

Identify another name for a relation.

Which of the following represents the constraint of the super key on two tuples t1 and t2?

• t1[SK]=t2[SK]

• t1[SK]!=t2[SK]

• t1[PK]!=t2[SK]

• t1[PK]=t2[SK]

Which of the following is not a DML command?

• Insert

• Update

• Drop

• Delete

Identify an appropriate definition for key attribute.

• Values of the attribute are distinct

• Values of the attribute are unknown

• Values of the attribute are atomic

• Values of the attribute are same

Weak Entity Types are identified by which of the following key?

• Key attribute

• Partial Key

• Strong key

• Weak key

Entities with the same basic attributes are grouped or typed into which of the following?

• Entity

• Entity set

• Entity type

• Strong entity

In the below-given schema, identify the multi-valued attribute.
EMPLOYEE(Ename,Address,Salary,Age,Qualification)

• Address

• Ename

• Salary

• Qualification

Which of the following represents real world object?

• Entity

• Data

• Attribute

• Tuple