删除数据库的命令是（）。

A:drop database B:delete database C:alter database D:remove database

在查询分析器中，使用DROP DATABASE命令，不可以一次删除多个数据库。

创建数据库的T-SQL语句是（）。

A:create database B:alter database C:drop database D:copy database

Hunting for a job late last year, lawyer Gant Redmon stumbled across CareerBuilder, a job database on the Internet. He searched it with no success but was attracted by the site’’ s "personal search agent". It’’s an interactive feature that lets visitors key in job criteria such as location, title, and salary, then E-mails them when a matching position is posted in the database. Redmon chose the keywords legal, intellectual property, and Washington, D. C. Three weeks later, he got his first notification of an opening. "I struck gold," says Redmon, who E-mailed his resume to the employer and won a position as in-house counsel for a company. With thousands of career-related sites on the Internet, finding promising openings can be time- consuming and inefficient. Search agents reduce the need for repeated visits to the databases. But although a search agent worked for Redmon, career experts see drawbacks. Narrowing your criteria, for example, may work against you: "Every time you answer a question you eliminate a possibility," says one expert. For any job search, you should start with a narrow concept what you think you want to do--then broaden it. "None of these programs do that," says another expert. "There’’ s no career counseling implicit in all of this." Instead, the best strategy is to use the agent as a kind of tip service to keep abreast of jobs in a particular database; when you get E-mail, consider it a reminder to check the database again. "I would not rely on agents for finding everything that is added to a database that might interest me," says the author of a job-searching guide. Some sites design their agents to tempt job hunters to return. When CareerSite’’ s agent sends out messages to those who have signed up for its service, for example, it includes only three potential jobs--those it considers the best matches. There may be more matches in the database; job hunters will have to visit the site again to find them--and they do. "On the day after we send our messages, we see a sharp increase in our traffic," says Seth Peets, vice president of marketing for CareerSite. Even those who aren’’ t hunting for jobs may find search agents worthwhile. Some use them to keep a close watch on the demand for their line of work or gather information on compensation to ann themselves when negotiating for a raise. Although happily employed, Redmon maintains his agent at CareerBuilder. "You always keep your eyes open," he says. Working with a personal search agent means having another set of eyes looking out for you. How did Redmon find his job

A:By searching openings in a job database. B:By posting a matching position in a database. C:By using a special service of a database. D:By E-mailing his resume to a database.

Which of the following statements about object oriented database is not correct?（）

A:Each object has a unique object identify in the system B:Encapsulation and inheritance are two important features of object oriented database C:A subclass can inherit the attributes and methods of all its superclasses D:A supereloss includes the attributes and methods at all subclasses

Software architecture reconstruction is an interpretive, interactive, and iterative process including many activities. (1) involves analyzing a system's existing design and implementation artifacts to construct a model of it. The result is used in the following activities to construct a view of the system. The database construction activity converts the (2) contained in the view into a standard format for storage in a database. The (3) activity involves defining and manipulating the information stored in database to reconcile, augment, and establish connections between the elements. Reconstruction consists of two primary activities: (4) and (5). The former provides a mechanism for the user to manipulate architectural elements, and the latter provides facilities for architecture reconstruction.

A:database normalization B:schema definition C:database optimization D:view fusion

OSPF is a link-state routing protocol. It is designed to be run internal to a single (1) system. Each OSPF router maintains an identical(2) describing the autonomous system's topology. From this database, a routing table is calculated by constructing a shortest-path (3).OSPF recalculates routes quickly in the face of topological changes, utilizing aminimum of routing (4) traffic. OSPF provides support for equal-cost multipath. An area routing capability is provided, enabling.an additional level of routing protection and a reduction in routing protocol (5).

A:tree B:table C:database D:record

Which of the following statements about object oriented database is not correct

A:Each object has a unique object identity in the syste B:Encapsulation and inheritance are two important features of object oriented database C:A subclass can inherit the attributes and methods of all its superclasses D:A superclass includes the attributes and methods of all its subclasses

Which of the following statements about object oriented database is NOT correct

A:Each object has a unique object identity in the system B:Encapsulation and inheritance are two important features of object oriented database C:A subclass can inherit the attributes and methods of all its superclasses D:A superclass includes the attributes and methods of all its subclasses