Question Discussion & Solution

MCQ

The tuples of the relations can be of ________ order.

Any

Same

Sorted

Constant

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In an E-R diagram an entity set is represent by a

rectangle

ellipse

diamond box.

circle

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Which of the following can be addressed by enforcing a referential integrity constraint?

All phone numbers must include the area code

Certain fields are required (such as the email address, or phone number) before the record is accepted

Information on the customer must be known before anything can be sold to that customer

Then entering an order quantity, the user must input a number and not some text (i.e., 12 rather than

Discussion

MCQ

Consider the employee work-team example, and assume that certain employees participate in more than one work team. A given employee may therefore appear in more than one of the team entity sets that are lower level entity sets of employee. Thus, the generalization is _____________

Overlapping

Disjointness

Uniqueness

Relational

Discussion

MCQ

A domain is atomic if elements of the domain are considered to be ____________ units.

Different

Indivisbile

Constant

Divisible

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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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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