Database Systems Quiz

Database Systems Quiz

University

37 Qs

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Database Systems Quiz

Database Systems Quiz

Assessment

Quiz

Other

University

Practice Problem

Easy

Created by

Frank Metor

Used 2+ times

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37 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of three-level database architecture?

To enhance data security by limiting access to all levels.
To eliminate the need for data redundancy in databases.
To simplify the user interface for database management.
To provide data abstraction and independence, allowing changes at one level without affecting others.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the contents of external, conceptual, and internal levels?

External level: user views; Conceptual level: logical structure; Internal level: physical storage.
External level: database management; Conceptual level: data analysis; Internal level: user access.
External level: data encryption; Conceptual level: user interface; Internal level: data processing.
External level: physical storage; Conceptual level: user views; Internal level: logical structure.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of external/conceptual and conceptual/internal mappings?

To enhance the visual design of a database application.
To reduce the amount of data stored in a system.
The purpose of external/conceptual and conceptual/internal mappings is to ensure accurate data representation and facilitate implementation in a database or system.
To simplify the user interface of a database.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does logical data independence mean?

The ability to change the conceptual schema without affecting external schemas or applications.
The ability to access data without any schema restrictions.
The ability to modify data without changing the database structure.
The ability to change external schemas without affecting the conceptual schema.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the distinction between DDL and DML?

DDL is used for data retrieval; DML defines database structure.
DDL and DML are both used for data analysis.
DDL is a programming language; DML is a database management tool.
DDL defines database structure; DML manipulates data within that structure.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a classification of data models?

Flat file
Hierarchical, network, relational, object-oriented, document
CSV
XML

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of conceptual modeling?

To analyze the performance of a system in real-time.
To implement the system directly in code.
To create detailed technical specifications for a system.
The purpose of conceptual modeling is to provide an abstract representation of a system to facilitate understanding and communication.

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