首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
How did the name of "computer virus" come into being?
How did the name of "computer virus" come into being?
admin
2017-05-31
15
问题
How did the name of "computer virus" come into being?
The computer virus is an outcome of the computer overgrowth in the 1980s. The cause of the term "computer virus" is the likeness between the biological virus and the evil program infected with computers. The origin of this term came from an American science fiction The Adolescence of P-1 written by Thomas J. Ryan, published in 1977. Human viruses invade a living cell and turn it into a factory for manufacturing viruses. However, computer viruses are small programs. They expand by attaching a copy of themselves to another program. Once attached to the host program, the viruses then look for other programs to "infect". In this way, the virus can spread quickly throughout a hard disk or an entire organization when it infects a LAN or a multi-user system. The timing of the attack can be linked to a number of situations, including a certain time or date, the presence of a particular file, the security level of the user, and the number of times a file is used. Likewise, the mode of attack varies. So called "benign" or the harmless viruses might simply display a message, like the one that infected IBM’s main computer system last Christmas with a season’ s greeting. Malignant or the harmful viruses are designed to damage the system. The attack is to wipe out data, to delete files, or to format the hard disk. There are several kinds of anti-virus software providing the services for prevent the virus from attacking your computer. So you should install the anti-virus software before your access to the Internet. It will be no use to install the software after you’ve got infected.
选项
A、It can cause no damages at all.
B、It can cause damages to the computer systems.
C、It can copy your files in computers.
D、It can format your hard drive.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/c3Vd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Didyoueverhavesomeone’snameonthetipofyourtongueandyetyouwereunabletorecallit?【C1】______thishappensagain,do
Cellphonesareverypopularnow;eventheprimaryschoolstudentsholdoneeveryday.Whatdoyouthinkofitsadvantagesanddi
Hewasafunnylookingmanwithacheerfulface,good-naturedandagreattalker.Hewasdescribedbyhisstudent,thegreatphi
Hewasafunnylookingmanwithacheerfulface,good-naturedandagreattalker.Hewasdescribedbyhisstudent,thegreatphi
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendpeopletocollegestointerviewgraduatingstudentsw
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthemanwiththeportablecomputerinbus
Thereisnodenyingthatstudentsshouldlearnsomethingabouthowcomputerswork,justasweexpectthematleasttounderstand
Whatwillthemandotonight?
随机试题
醛固酮的主要作用是【】
患者,男,58岁,诊断为急性前壁心肌梗死,发病第2天突然出现短阵意识丧失、抽搐,心电图上最可能出现的心律失常是哪一种()。
反映心脏后负荷的指标是
患儿,女,1岁。3天前因受凉出现发热,咳嗽,轻度喘憋,食欲减退,查体:T39.5℃,心率160次/分,呼吸72次/分,口周发绀,鼻翼扇动,腹胀明显,腹部听诊肠鸣音消失。该患儿最可能发生的并发症是
在发生时确认为当期损益,而不计人存货成本的包括()。
固定资产余值和流动资金的回收均在( )计算。
根据土地增值税相关规定,下列行为中,需要缴纳土地增值税的是()。(2010年)
关于合同成立和生效之间的关系,下列说法正确的是()。
n(n>1)名海盗按照下列的方式分金币:第一名海盗先拿1枚金币,再拿剩下金币的1%:第二名海盗先拿2枚金币,再拿剩下金币的1%……;第n名海盗先拿n枚,再拿剩下金币的1%。如果金币恰好被分完时,每名海盗拿到的金币数一样多,那么一共有多少枚金币?
业务规范
最新回复
(
0
)