Database Data Models and Data Manipulation Languages Quiz

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What is a foreign key within a tuple used for?

To contain values of the referenced tuple's primary key (correct)

To uniquely identify each tuple in the database

To perform join operations with other tuples

To store attributes of the tuple

In relational theory, which mathematical concept is utilized for data management?

Set theory (correct)

Graph theory

Linear algebra

Calculus

What is the purpose of a data model in database management?

To design efficient storage strategies

To execute complex queries on the database

To logically organize real world objects, their constraints, and relationships (correct)

To create user interfaces for database interaction

Which concept represents the behavior of an object in an object-oriented data model?

Methods Signup and view all the answers

What does encapsulation refer to in object-oriented data modeling?

State and behavior of an object are accessed only through message passing Signup and view all the answers

What is an attribute in an object-oriented data model?

An instance variable representing a property of an object Signup and view all the answers

What is the most widely deployed model for storing data in databases?

Relational data model Signup and view all the answers

Which data model provides a convenient graphical representation for viewing data, relationships, and constraints in database design?

Entity Relationship (E-R) data model Signup and view all the answers

What type of language enables users to access or manipulate data by specifying only what data are needed, without specifying how to get that data?

Nonprocedural DML Signup and view all the answers

Which subsystem of a database system provides the interface between low-level data in the database and application programs/queries?

Storage manager subsystem Signup and view all the answers

What is a language for specifying the database schema and other properties of the data in a database system?

Data-Definition Language (DDL) Signup and view all the answers

Which type of language compiles and executes Data-Definition Language (DDL) and Data-Manipulation Language (DML) statements in a database system?

Query processor subsystem Signup and view all the answers

What are data models that show the relationships between data records within a file structure called?

Hierarchical data models Signup and view all the answers

Which aspect is an advantage of the hierarchical data model?

Data security Signup and view all the answers

What is a disadvantage of the hierarchical data model?

Implementation complexity Signup and view all the answers

Which type of data model provides a logical link between parent segments and child segments?

Hierarchical data models Signup and view all the answers

What aspect makes the hierarchical data model suitable for databases with a large number of 1:N relationships?

Data integrity Signup and view all the answers

Which term refers to the structures and access techniques provided by a specific DBMS?

Data model Signup and view all the answers