数据库原理英文选择题.docx

1、Made by Christina2009-6-24Multiple-Choice Quiz 11. An E-Commerce system consists of the following components. Which of these same components must be included in a database? (a)The data, such as information about the goods available for sale, customers, orders placed, shipping information, etc.A data

2、base must include a collection of programs that control the data, such as programs to create, maintain, and manipulate the data. These programs can be easily used to create, maintain, and manipulate data in other domains. A database must include a collection of programs that operate on the data, but

3、 are specific to the E-commerce system. These programs enable users to browse through the store-items, place orders, track shipping, etc. (a) I only(b) I, II, and III (c) II only(d) I and II only 2. In a database system, whose responsibility is it to provide data consistency? (b) (a) the database ad

4、ministrators(b) the DBMSs (c) the users(d) the application programmers 3. An E-Commerce system consists of the following components. Which of the same components must be included in a database management system? (b)The data, such as information about the goods available for sale, customers, orders p

5、laced, shipping information, etc. A collection of programs must be included that control the data, such as programs to create, maintain, and manipulate the data. These programs can be easily used to create, maintain, and manipulate data in other domains, such as in a library information system. A co

6、llection of programs that operate on the data, but are specific to the E-commerce system. These programs enable users to browse through the store-items, place orders, track shipping, etc. (a) II and III only(b) II only (c) I, II, and III(d) I only 4. An E-Commerce database contains data about custom

7、ers, products, orders, system response times, etc. Which of the following can be specified as integrity constraints in an E-Commerce database system? (d) No two products can have the same product ID. The DBMS response time for all Web requests should be at most 2 seconds. A customer order cannot hav

8、e more than one shipping address. (a) I, II, and III(b) I and II only (c) I only(d) I and III only 5. An E-Commerce system consists of the following components. Which of these same components will constitute a database system? (c)The data, such as information about the goods available for sale, cust

9、omers, orders placed, shipping information, etc.A collection of programs that control the data, such as programs to create, maintain, and manipulate the data constitutes a database system. These programs can be easily used to create, maintain, and manipulate data in other domains such as in a librar

10、y information system. A collection of programs that operate on the data, but are specific to the E-commerce system, constitutes a database system. These programs enable users to browse through the store-items, place orders, track shipping, etc. (a) I only(b) II only (c) I, II, and III(d) I and II on

11、ly 6. A database is needed for which of the following application scenarios? (a)A video store that needs to keep track of data about members, about videos carried by the store, about videos rented by members, as well as data concerning borrow-date, return-date, and payment information. In the human

12、resources department of a company, information about employees, their titles, their salaries and sick days, and about vacation days taken by each employee. A computer-simulated video game which needs to calculate and display, the physical (x, y) location of each actor in the game, the speed with whi

13、ch they are moving at the current instant, the direction in which they are moving, the action they are performing, the angle at which the game-player is viewing the scene. (a) I and II only(b) I only (c) I and III only(d) I, II, and III 7. The physical storage structure will be _ to the application

14、programmer in a database approach, and will be _ to the application programmer in a file system approach. (c) (a) hidden, hidden(b) visible, visible (c) hidden, visible(d) visible, hidden Multiple-Choice Quiz 2 1. What information is necessary when specifying the structure of a table? (a) (a) the na

15、me of the table, the names of the tables attributes, the data types of attributes, and the formats of attributes (b) the name of the table and the names of the tables attributes (c) the name of the table, the names of the tables attributes, the data types of the tables attributes, the formats of the tables attributes, and the maximum number of rows that the table can have (d) the name of the table and the amount of storage space to be allocated to the table 2. The arity of a table is the number of _ in the table. (b) (a) keys(b) columns (c) rows(d) foreign keys 3. The cardinality of a tabl