Message Tube Prep Knowledge Point explaining • Operating system overview

The Information System Management Engineer is an intermediate examination in the National computer Technology and software Professional Technical Qualification Examination (hereinafter referred to as the Software Qualification examination). The examination of Information System Management engineer requires examinee to master the relevant knowledge content of computer system, operating system, database, computer network, informationization and information system. The Information System Management Engineer Exam requires a wide range of content, and what are the key points to be mastered during preparation? Below follow the Greek Soft Test Institute to learn information Systems Management Engineer operating system chapter about the operating system to focus on the content.

Information System Management Engineer preparation Knowledge point explaining operating system Overview

1. Operating System Definitions

Operating system: is the management of software and hardware resources, control program execution, improve human-machine interface, reasonable organization of computer workflow and for users to use the computer to provide a good operating environment of a system software.

2, the role of the operating system

(1) Improve the efficiency of computer system through resource management;

(2) To improve the human-machine interface, to provide users with a friendly working environment;

3, the operating system features

Concurrency: Two or more two running programs are executed simultaneously within the same interval.

Sharing: Refers to the resources in the operating system can be used by multiple concurrent execution.

Asynchrony: Or randomness, which allows multiple processes to run asynchronously in a multi-channel program environment.

Sharing and concurrency are the two most basic features of the operating system and are interdependent.

4.Spooling (Peripheral device online operation)

Often referred to as spooling system or spool system, is actually a kind of physical equipment to simulate another class of physical equipment technology, is to make the exclusive use of the device into multiple virtual devices of a technology, is also a speed matching technology.

The spooling system is composed of "pre-input program", "Slow Output program" and "Well Management program" as well as input and output wells. The input and output wells are the storage areas that the system opens up on the secondary storage in order to store the information entered from the input device and the result of the job execution.

Message Tube Prep Knowledge Point explaining • Operating system overview