Operating system mcqs security system facility

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Operating system mcqs security system facility

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How does an antivirus of today identify viruses?
A
Previously known patterns
B
It can detect unknown patterns
C
It can take high priority to increase scanning speed
D
None of the mentioned
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is are two safe computing practices?
A
Not to open software from unknown vendors
B
Open and execute programs in admin level/root
C
Open and execute programs in presence of antivirus
D
None of the mentioned
Question 2 Explanation: 
Disgruntled employees have in past infected the master copies of software programs to do economic harm to the company.
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the two features of a tripwire file system?
A
It is a tool to monitor file systems
B
It is used to automatically take corrective action
C
It is used to secure UNIX system
D
None of the mentioned
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is used to protect network from outside internet access?
A
A trusted antivirus
B
24 hours scanning for virus
C
Firewall to separate trusted and untrusted network
D
Deny users access to websites which can potentially cause security leak
Question 4 Explanation: 
Firewall create a protective barrier to secure internal network. An antivirus can only detect harmful viruses but cannot stop illegal access by remote attacker.
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How do viruses avoid basic pattern match of antivirus?
A
They are encrypted
B
They act with special permissions
C
They modify themselves
D
None of the mentioned
There are 5 questions to complete.

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