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MCQ

Which of the following is a low level operator?

Insert

Update

Delete

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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

level entity set.

Disjointness

Uniqueness

Special

Relational

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

An attribute of an entity can have more than one value

An attribute of an entity can be composite

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

In a row of a relational table, an attribute can have exactly one value or a NULL value

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

Secondary Key

Primary key

Foreign key

Composite key

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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

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General

Medical

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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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