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MCQ

Which one of the following uniquely identifies the elements in the relation?

Secondary Key

Primary key

Foreign key

Composite key

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MCQ

Data integrity constraints are used to:

Control who is allowed access to the data

Ensure that duplicate records are not entered into the table

Improve the quality of data entered for a specific property

Prevent users from changing the values stored in the table

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MCQ

An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.

One-to-many

One-to-one

Many-to-many

Many-to-one

Discussion

MCQ

In the relational modes, cardinality is termed as:

Number of tuples.

Number of attributes.

Number of tables.

Number of constraints.

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MCQ

Which of the following indicates the maximum number of entities that can be involved in a relationship?

Minimum cardinality

Maximum cardinality

ERD

Greater Entity Count

Discussion

MCQ

A primary key is combined with a foreign key creates

Parent-Child relation ship between the tables that connect them

Many to many relationship between the tables that connect them

Network model between the tables that connect them

None of the mentioned

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category More Database Management System Topics

Miscellaneous or General

Relational Algebra

Database Systems

Data Models

The Relational Database Model

Entity Relationship (ER) Modeling

Advanced Data Modeling

Normalization

Structured Query Language (SQL)

Advanced SQL

Database Design

Transaction and Concurrency

Data Warehouses

Database Administration

Mixed

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