22 Questions
What is the primary objective of the Conference on Data Systems Languages (CODASYL) in creating the Database Task Group (DBTG)?
To establish database standards
What is the term for the collection of records in 1:M relationships in the Network Model?
Set
What is the purpose of the Data Definition Language (DDL) in the Network Model?
To define schema components
What is the term for the conceptual organization of the entire database as viewed by the database administrator?
Schema
What is an advantage of the Network Model?
Ability to model complex relationships
What is the relationship between the Owner and Member in the Network Model?
Parent-Child
What is the primary focus of physical/low-level data models?
Describing details of how data is stored in the computer
What is the purpose of the external schema in the Three-Schema Architecture?
To describe the various user views
According to the ANSI/SPARC framework, which level of abstraction describes the structure and constraints for the whole database?
Conceptual
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
What is the role of the DBMS in the Three-Schema Architecture?
To map requests and data among schema levels
What is the main advantage of using implementation/representational/logical data models?
They balance user views with some computer storage details
What is the primary benefit of the declarative nature of SQL language?
Protection of data from programming errors
What is the main goal of Big Data management?
To derive business insights from large amounts of web-generated data
What is a key characteristic of NoSQL databases?
Supports distributed database architectures
What is the term for data with a large number of attributes but a low number of actual instances?
Sparse data
What is the term for the guarantee that updates will eventually propagate through the system?
Eventual consistency
What is the main characteristic of a key-value data model?
Has two main data elements: key and value
What is the primary focus of database vendors in the 'Internet age'?
Developing database products that interface efficiently with the Internet
What is a common characteristic of successful 'Internet age' databases?
Flexible, efficient, and secure Internet access
What type of data model provides concepts that are close to how users perceive data?
Conceptual / high-level / semantic data model
What is the main benefit of Object-Relational Data Models?
Provides upward compatibility with existing relational languages
Understand the different types of data models, including entity-based, logical, and physical data models. Learn how ANSI/SPARC classifies data models according to their degree of abstraction.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
