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A particular computer virus frequently infects personal computers

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D
Joined: 13 Apr 2015
Posts: 1710
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
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WE: Analyst (Retail)
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A particular computer virus frequently infects personal computers  [#permalink]

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New post 22 Feb 2017, 20:36
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A
B
C
D
E

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  55% (hard)

Question Stats:

64% (01:23) correct 36% (03:07) wrong based on 127 sessions

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A particular computer virus frequently infects personal computers through an email message. Even though virus-scanning software installed on a computer is designed to identify and alarm the user of a virus infection on that computer shortly after it occurs, this particular virus is rarely observed by virus-scanning software. This fact, however, does not mean that the computer's security systems have blocked installation of the virus, because _______________.

Which of the following most logically completes the argument?

A. shortly after it appeared on the Internet, hackers modified the virus in a way that made it more effective

B. the virus was able to replicate itself and then send itself to people in the victim's address book

C. even after the virus had stopped spreading, the backdoors created during the initial infections remained active

D. the virus was able to disable virus-scanning software and pose as a virus-removal tool

E. the virus also altered the victim's operating system in a way that made it difficult to shutdown the computer without cutting off power to the system.
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Joined: 24 Oct 2013
Posts: 145
Location: India
Concentration: General Management, Strategy
WE: Information Technology (Computer Software)
A particular computer virus frequently infects personal computers  [#permalink]

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New post 22 Feb 2017, 23:53
Answwer requires us to find an answer that would state "virus is not not blocked and it does exist".

Option A states that it is not detected becasue the virus is build effectively now.

I choose A
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Joined: 13 Apr 2015
Posts: 1710
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
GPA: 4
WE: Analyst (Retail)
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Re: A particular computer virus frequently infects personal computers  [#permalink]

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New post 23 Feb 2017, 23:35
1
Question Type: Complete the passage

Main Point: No virus detection \(\neq\) Virus installation blocked
Missing Info: The virus may be present in a disguised form

A. shortly after it appeared on the Internet, hackers modified the virus in a way that made it more effective - Incorrect. Effectiveness of the virus is not disputed in the argument. Out of context.

B. the virus was able to replicate itself and then send itself to people in the victim's address book - Incorrect. Out of scope.

C. even after the virus had stopped spreading, the backdoors created during the initial infections remained active - Incorrect. Out of scope.

D. the virus was able to disable virus-scanning software and pose as a virus-removal tool - Correct. If the virus disguised itself in the system as a virus removal tool then it it undetected.

E. the virus also altered the victim's operating system in a way that made it difficult to shutdown the computer without cutting off power to the system. - Incorrect. Again this is not relevant to the main point.

Answer: D
Re: A particular computer virus frequently infects personal computers &nbs [#permalink] 23 Feb 2017, 23:35
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