笔试试题及答案（71-80）

下列各题A)、B)、C)、D)四个选项中,只有一个是正确的,请将正确选项涂写在答题卡相应位置上,答在试卷上不得分。 

(71) Which of the following commands is not one for communication among users_____. (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)
Ⅰ. calling relation
Ⅱ. belonging relation
Ⅲ. Execution relation
Ⅳ. process relation
A) Ⅰ and Ⅱ B) Ⅱ and Ⅲ C) Ⅲ and Ⅳ D) none

(80) N-S diagram can used to substitute conventional program flow chart. In the following phrases, which does not belong to the basic control structures that contain?_____.
A) sequence structure B) condition structure
C) selection structure D) execution structure
答案为：（71－75） DDACA（76－80） DCBCD