Câu hỏi về cơ sở dữ liệu

What is a database?

• A program consisting of many commands

• A matrix

• A relationship

• A structured set of data stored in a computer

Which statement is correct about the components of a database system?

• Data, hardware

• Data, hardware, software, and users

• Data, software

• Data, users

What is the significance of tables in a relational data model?

• Each table is called a relation/entity type/file

• Each table is called a database

• Each table is called an object

• Each table is called information

What issues does a database need to address?

• Ownership, security, and authorization, data disputes, ensuring safety

• Ownership, security, and authorization

• Ownership, security, and authorization, data disputes

• Ownership

What does the image below describe?

• Database table

• External level

• Database architecture

• Layered model

Which statement is correct about structured and unstructured databases?

• Structured databases have organized and clear relationships between components, while unstructured databases do not have clear structure

• Both structured and unstructured databases have organized and clear relationships between components

• Both structured and unstructured databases do not have clear structure

• Structured databases do not have clear structure, while unstructured databases do

Who is responsible for organizing the content of the database, creating and granting access rights to users, and protecting data safety in case of incidents?

• System analyst and designer

• Database administrator

• Application programmer

• End user

Câu 8: Điểm nào sau đây diễn giải đúng về tính dùng chung của cơ sở dữ liệu ?

• A. Cơ sở dữ liệu cho phép nhiều người truy cập và sử dụng dữ liệu mà không bị ảnh hưởng đến người khác

• B. Cơ sở dữ liệu giảm bớt chi phí bảo trì hệ thống

• C. Cơ sở dữ liệu đảm bảo tính nhất quán và toàn vẹn dữ liệu

• D. Cơ sở dữ liệu tăng khả năng phát triển các ứng dụng

Which of the following correctly interprets the common use of databases?

• Databases allow multiple users to access and use data without being affected by others

• Databases reduce system maintenance costs

• Databases ensure data consistency and integrity

• Databases increase the ability to develop applications

What does the image below illustrate?

• Distributed data model

• Network data model

• Object-oriented data model

• Hierarchical data model