Single Choice Questions 1. The main function of a database management system is to ( ). A. Achieve unified management of data and perform operations on the data in the database. B. Collect data. C. Plan, design, and maintain databases. D. Provide a data query interface
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Single Choice Questions
1. The main function of a database management system is to ( ).
A. Achieve unified management of data and perform operations on the data in the database.
B. Collect data.
C. Plan, design, and maintain databases.
D. Provide a data query interface
2. A database is organized and stored in a computer system according to a certain model of ( ).
A. Collection of files. B. Collection of programs.
C. Collection of commands. D. Collection of data.
3. All base tables comprise the ( ) of the database.
A. Internal schema. B. Conceptual schema.
C. External schema. D. Logical schema.
4. Traditional data models classify database systems into three types: ( ).
A. Interactive, embedded, and hybrid.
B. English, Chinese, and compatible.
C. Hierarchical, network, and relational.
D. Data, graphics, and multimedia.
5. The most commonly used data model in conceptual database design is ( ).
A. Visual model. B. Physical model.
C. Logical model. D. Entity-relationship model.
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