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发布时间：2006-06-27 07:51     点击：

(2 points)

A) mail B) write C) telnet D) nice

(72) Of the items listed below,which one(s) should be saved into the process control block?

(2 Points)

Ⅰ.Process name and process number

Ⅱ.Process running information

Ⅲ.Current opened file information

A) Ⅰ and Ⅱ B) Ⅰ and Ⅲ C) Ⅱ and Ⅲ D) Ⅰ,Ⅱ and Ⅲ

(73) The DOS command which reads and changes properties of a file is

A) ATTRIB B) COMP C) SYS D) XCOPY

(74) In the following statements about functional dependency, which one is incorrect? (2 Points)

A) If X→Y and Y→Z, then X→Z.

B) If X→Y and Y'ìY, then X→Y'.

C) If X→Y and X'ìX, then X'→Y.

D) If X'ìX, then X→X'.

(75) Which of the following is not responsibility of DBA(Data Base Administrator)?

A) Database management system design

B) Database schema definition

C) Database schema modification

D) Integrity constraint specification

(76) Which of the following is not among the basic features of a relational database?

A) It does not matter what order the rows are in.

B) It does not matter what order the columns are in.

C) Different columns should have different column names.

D) Different columns should have different data types.

(77) Which of the following statements about ORACLE is (are) correct?

Ⅰ. ORACLE follows SQL standard

Ⅱ. ORACLE database defines two logical types: table and view

A) Ⅰ only B) Ⅱ only C) Ⅰ and Ⅱ D) none of the above

(78) The task of the general design stage in structured life circle method is, to build what kind of software system structure?

A) program structure B) general structure

C) module structure D) function structure

(79) The software structure is an expression of the relationship among software modules. In the following phrases, which are not the relation among software modules? (2 Points)

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