2.7 What is the purpose of system programs? 答: 为程序开发和运行提供了方便的环境 给用户提供基本的公共功能函数,为用户在不用自己写代码的情况下解决公用问题 Answer: System programs can be thought of as bundles of useful system calls. They prov
1.7 We have stressed the need for an operating system to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to“waste” resources? Why is such a system not really wasteful?答：单用户系统，它应该最大化地为用户使用，一...
选项A侧重基础概念,可能更适用于入门课程;选项B与学术活动目的矛盾;选项C针对考试准备,并非夏令营核心;选项D符合职业探索和实践能力培养的目标,因此正确答案为D。反馈 收藏
To a computer scientist it may mean either the hardware system of the computer or the software programs or information systems. Thus, the term has become so generic that it is almost meaningless. The purpose of this paper is to develop a concept and definition of the systems approach as a ...
computer's hardware and application programs. Thinking of the computer system as a layered model, the system software is the interface between the hardware and user applications. The operating system (OS) is the best-known example of system software. The OS manages all the other programs in a...
Most employers contribute to the federal and state unemployment programs that compensate workers who have lost their jobs. As such, FUTA is not a payroll deduction because it only applies to employers, not employees. To comply, you must pay 6% in taxes on the first $7,000 you pay an emplo...
The purpose of the OSI reference model is to guide technology vendors and developers so the digital communications products and software programs that they create can interoperate. Most vendors involved in telecommunications try to describe their products and services in relation to the OSI model. This...
What is the main purpose of the passage? A. To encourage people to use the programs. B. To talk about online education experience. C. To describe the history of the programs. D. To help parents teach their children online. 相关知识点: ...
the eniac required manual rewiring to change programs, making it time-consuming and prone to errors. it lacked the flexibility and ease of programming found in modern computers. where did the eniac's calculations take place, and how were the results obtained? the eniac's calculations took place...
key. the key is usually labeled with the letters esc or escape, although some keyboards may use a different symbol or abbreviation. what is the purpose of the esc key in the command line interface? in the command line interface, the esc key is used to interrupt or cancel a process or ...