COPY: Data Modeling Concepts

What is the primary objective of the Conference on Data Systems Languages (CODASYL) in creating the Database Task Group (DBTG)?

To establish database standards (correct)
To manipulate database contents
To define data structures
To improve database performance

What is the term for the collection of records in 1:M relationships in the Network Model?

Subschema
Schema
Database
Set (correct)

What is the purpose of the Data Definition Language (DDL) in the Network Model?

To model complex relationships
To define schema components (correct)
To manipulate database contents
To represent data semantics

What is the term for the conceptual organization of the entire database as viewed by the database administrator?

Schema (B) Signup and view all the answers

What is an advantage of the Network Model?

Ability to model complex relationships (A) Signup and view all the answers

What is the relationship between the Owner and Member in the Network Model?

Parent-Child (A) Signup and view all the answers

What is the primary focus of physical/low-level data models?

Describing details of how data is stored in the computer (B) Signup and view all the answers

What is the purpose of the external schema in the Three-Schema Architecture?

To describe the various user views (B) Signup and view all the answers

According to the ANSI/SPARC framework, which level of abstraction describes the structure and constraints for the whole database?

Conceptual (B) Signup and view all the answers

What is the benefit of the Three-Schema Architecture in terms of program-data independence?

It supports changes to the physical storage without affecting the program (C) Signup and view all the answers

What is the role of the DBMS in the Three-Schema Architecture?

To map requests and data among schema levels (A) Signup and view all the answers

What is the main advantage of using implementation/representational/logical data models?

They balance user views with some computer storage details (B) Signup and view all the answers

What is the primary benefit of the declarative nature of SQL language?

Protection of data from programming errors (A) Signup and view all the answers

What is the main goal of Big Data management?

To derive business insights from large amounts of web-generated data (D) Signup and view all the answers

What is a key characteristic of NoSQL databases?

Supports distributed database architectures (D) Signup and view all the answers

What is the term for data with a large number of attributes but a low number of actual instances?

Sparse data (D) Signup and view all the answers

What is the term for the guarantee that updates will eventually propagate through the system?

Eventual consistency (C) Signup and view all the answers

What is the main characteristic of a key-value data model?

Has two main data elements: key and value (D) Signup and view all the answers

What is the primary focus of database vendors in the 'Internet age'?

Developing database products that interface efficiently with the Internet (B) Signup and view all the answers

What is a common characteristic of successful 'Internet age' databases?

Flexible, efficient, and secure Internet access (B) Signup and view all the answers

What type of data model provides concepts that are close to how users perceive data?

Conceptual / high-level / semantic data model (C) Signup and view all the answers

What is the main benefit of Object-Relational Data Models?

Provides upward compatibility with existing relational languages (A) Signup and view all the answers