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MCQ

Let us consider phone_number ,which can take single or several values . Treating phone_numberas an _________ permits instructors to have several phone numbers (including zero) associated with them.

Entity

Attribute

Relation

Value

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There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called

Commonality

Specialization

Generalization

Similarity

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MCQ

Which of the following is another name for weak entity?

Child

Owner

Dominant

All of the above

Discussion

MCQ

The term attribute refers to a ___________ of a table.

Record

Column

Tuple

Key

Discussion

MCQ

In the relational modes, cardinality is termed as:

Number of tuples.

Number of attributes.

Number of tables.

Number of constraints.

Discussion

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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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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Community Discussion

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