Practice Logical Database Design Multiple Choice Questions with Answers Quiz-3 - MCQGeeks.com

Q.1.

When mapping a multivalued attribute into a relation which of the following is true?

One relation is created.
Two relations are created.
Three relations are created.
Four relations are created.

Q.2.

A relation has which of the following properties?

Each row is not unique.
Attributes can have the same name within a given table.
Each relation has a unique name.
The order of the columns is significant.

Q.3.

If no multivalued attributes exist in a relation, then the relation is in what normal form?

First normal form
Second normal form
Third normal form
Fourth normal form

Q.4.

When mapping a ternary relationship with an associative entity into a relation which of the following is true?

One relation is created.
Two relations are created.
Three relations are created.
Four relations are created.

Q.5.

A primary key is which of the following?

Any attribute
An attribute that uniquely identifies each row
An attribute that uniquely identifies each column
A derived attribute

Q.6.

The relational model consists of:

data in the form of tables.
data redundancy.
operations using non-SQL languages.
unorganized data.

Q.7.

When mapping a regular entity into a relation which of the following is true?

One relation is created.
Two relations are created.
Three relations are created.
Four relations are created.

Q.8.

When mapping a binary many-to-many relationship into a relation which of the following is true?

One relation is created.
Two relations are created.
Three relations are created.
Four relations are created.

Q.9.

When mapping a supertype/subtype relationship which of the following is true?

The supertype primary key is assigned to each subtype.
The subtype primary key is assigned to each supertype.
There is no link between the supertype/subtype entities.
There is no primary key/foreign key relationship between a supertype/subtype.

Q.10.

Relations are:

two-dimensional tables.
three-dimensional tables.
four-dimensional tables.
five-dimensional tables.

Q.11.

The entity integrity rule states that:

no primary key attribute may be null.
no primary key can be composite.
no primary key may be unique.
no primary key may be equal to a value in a foreign key.

Q.12.

When mapping a many-to-many unary relationship into a relation which of the following is true?

One relation is created.
Two relations are created.
Three relations are created.
Four relations are created.

Q.13.

If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?

First normal form
Second normal form
Third normal form
Fourth normal form

Q.14.

A foreign key is which of the following?

Any attribute
The same thing as a primary key
An attribute that serves as the primary key of another relation
An attribute that serves no purpose

Q.15.

A transitive dependency is which of the following?

A functional dependency between two or more key attributes.
A functional dependency between two or more nonkey attributes.
A relation that is in first normal form.
A relation that is in second normal form.