os操作系统考试参考题

判断题

6 T/F-One kind of system interrupt ,the trap, relates to an error or exception condition in the currently running process.

7 T/F-The process

13 T/F-In a memory system employing paging, the chunks of a process(called frames) can be assigned to available chunks of memory(called pages).

14 T/F-A memory system employing segmentation consists of a number of user program segments that must be of the same length and leave a maximum segment length.

17 T/F-Double buffering refers to the concept of using two buffers to alternatively fill and empty in order to facilitate the buffering of an I/O request.

18 T/F-A pile file refers to the least complicated form of the file organization, where data are collected in sorted order and each record consists of one burst of data.

19 T/F-In the general indexed file structure, there are no key fields and variable-length records are allowed.

20 T/F- Typically, an interactive user or a process has associated with it a current directory, often referred to as the working directory.

21 T/F-In a uniprocessor machine, concurrent processes cannot be overlapped; they can only be interleaved.

22 T/F-In indirect addressing, as applied to message passing messages are sent to a temporary shared data structure typically known as a mailbox.

23 T/F-Deadlock can be defined as the periodic blocking of a set of processes that either compete for system resources or communicate with each other.

24 T/F-A reusable resource is one that can be safely used by only one process at a time and is not depleted by that use

选择题D,B,C,D,D, B,A,D,C,A, C,A,B,A,A, C,D,D

1 A primary objective of an operating sys tem is:

a. Convenlence

b. Efficleary

c. Ability to

d. All of the above

2 The operating system provides many types of services to end-users,programmers and system designers,including:

a.Built-in user applications

b.Error detection and response

c.Relational database capabilities with the internal file system.

d.All of the above

3 The behavior of a processor can be characterized by examining:

a.A single process trace

b.Multiple process rtaces

c.The interleaving of the process traces

d.All of the above

4 There are a number of conditions that can be lead to process termination,including:

a. Normal completion

b. Bounds violation

c. Parent termination

d. All of the above

5 A Memory Table is an O/S structure that is used by the O/S to:

a. Manage I/O devices

b. Manage processed

c. Provide information about system files

d. None of the above

6 The type of scheduling that involves the decision to add a process to those that are at least partially in main memory and therefore available for execution is referred to as:

a. Long-term scheduling

b. Medium-term scheduling

c. I/O scheduling

d. None of the above

7.In terms of frequency of execution, the short-term schedulers is usually the one that executes:

a. Most frequently

b.Least frequently

c.About the same as the other schedulers

d.None of the above

8 A problem with the largely obsolete Fixed Partitioning memory management technique is that of:

a. Allowing only a fixed number of Processes

b. Inefficient use of memory

c. Internal fragmentation

d. All of the above