首页
登录
职称英语
[originaltext] It’s always fun to write about research that you can actually
[originaltext] It’s always fun to write about research that you can actually
游客
2023-09-02
35
管理
问题
It’s always fun to write about research that you can actually try out for yourself.
Try this:Take a photo and upload it to Facebook, then after a day or so, note what the URL link to the picture is, and then delete it Come back a month later and see if the link works. Chances are: It will.
Facebook isn’t alone here. Researchers at Cambridge University have found that nearly half of the social networking sites don’t immediately delete pictures when a user requests they be removed. In general, photo-centric websites like Flickr were found to be better at quickly removing deleted photos upon request.
Why do "deleted" photos stick around so long?The problem relates to the way data is stored on large websites: While your personal computer only keeps one copy of a file, large-scale services like Facebook rely on what are called content delivery networks to manage data and distribution. It’s a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time. But because changes aren’t reflected across the content delivery networks immediately, ghost copies of files tend to linger for days or weeks.
In the case of Facebook, the company says data may hang around until the URL in question is reused, which is usually "after a short period of time", though obviously that time can vary considerably.
30. Q:What does the speaker ask us to try out?
31. Q:What accounts for the failure of some websites to remove photos immediately?
32. Q:When will the unwanted data eventually disappear from Facebook according to the company?
选项
A、When the system is down.
B、When new links are set up.
C、When the URL is reused.
D、When the server is restarted.
答案
C
解析
就Facebook来说,公司表示等到URL链接被重新使用之后,照片才会被删除。
转载请注明原文地址:https://tihaiku.com/zcyy/2978675.html
相关试题推荐
[originaltext]W:IreallylikeVanGogh’swork.Icanfeelakindofuncontroll
[originaltext]W:IreallylikeVanGogh’swork.Icanfeelakindofuncontroll
[originaltext]W:IreallylikeVanGogh’swork.Icanfeelakindofuncontroll
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettable!
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettable!
[originaltext]MyfatherdiedwhenIwasninemonthsold,makingmymomasingle
[originaltext]W:Hi,Rex.How’syourhistorypapergoing?M:It’scomingalong.
[originaltext]W:Hi,Rex.How’syourhistorypapergoing?M:It’scomingalong.
[originaltext]Since1939,numerousscientificstudieshavebeenconductedt
[originaltext]Since1939,numerousscientificstudieshavebeenconductedt
随机试题
CourageSomeoftheworld’soldestandbeststoriesareaboutcourage.Theya
标志性建筑symbolicconstruction;landmarkbuilding
电感元件上的电压、电流相位存在正交关系,且电压()电流。A.等于 B.同相
下列哪项是早产儿视网膜病变的临床表现A.病变早期在视网膜有血管区与无血管区之间出
“六一”期间,中央商场搞“家电下乡”活动,农民购买家电时可享受政府补贴l3%的优
患者女性,50岁。不规则阴道流血半年,全身体检和妇检子宫、附件均无异常。不支持诊
某设区市的A企业未按照要求报送劳动工资统计报表,该企业收到市统计局的《统计报表催
下列关于费用与损失的表述中,正确的有()。A.费用是企业日常活动中形成的会导致
在资本市场上,投资银行有义务为证券创造一个流动性较强的二级市场,并维持市场价格的
(2021年真题)甲公司是一家家电制造企业,下设M事业部为利润中心,7月份销售收
最新回复
(
0
)