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MCQ

A relational database consists of a collection of

Tables

Fields

Records

Keys

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MCQ

R diagrams by labeling the lines that connect ___________ to __________

Diamond , diamond

Rectangle, diamond

Rectangle, rectangle

Diamond, rectangle

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MCQ

______ is a special type of integrity constraint that relates two relations & maintains consistency across the relations.

Entity Integrity Constraints

Referential Integrity Constraints

Domain Integrity Constraints

Domain 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

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MCQ

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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MCQ

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

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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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More Database Management System Topics