This set of 1000+ Operating System MCQs focuses on “Security – Securing Systems and Facilities”
1) What is not a important part of security protection ?
a) Large amount of RAM to support antivirus
b) Strong passwords
c) Audit log periodically
d) Scan for unauthorized programs in system directories
Explanation: RAM has no effect on security of a system. System’s protection remains unchanged in increasing or decreasing amount of RAM.
2) 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.
Explanation: Firewall create a protective barrier to secure internal network. A antivirus can only detect harmful viruses but cannot stop illegal access by remote attacker.
3) What is best practice in firewall domain environment ?
a) Create two domain trusted and untrusted domain
b) Create strong policy in firewall to support different types of users
c) Create one Demiliatarized zone
d) Create two DMZ zones with one untrusted domain
Explanation: All live servers or workstations are kept in a separate zone than inside and outside to enhance protection.
4) Which direction access cannot happen using DMZ zone by default ?
a) Company computer to DMZ
b) Internet to DMZ
c) Internet to company computer
d) Company computer to internet
Explanation: Connection from internet are never allowed to directly access internal PCs but is routed through DMZ zone to prevent attacks.
5) What are two features of a tripwire file system ?
a) It is a tool to monitor file systems
b) It is used to alert system administrator to these modification
c) It is used to automatically take corrective action
d) It is used to secure UNIX system
6) How do viruses avoid basic pattern matchof antivirus ?
a) They are encrypted
b) They act with special permissions
c) They modify themselves
d) None of the mentioned
7) How does an antivirus of today identify viruses ? Choose two
a) Previously known patterns
b) It can detect unknown patterns
c) It can take high priority to increase scanning speed
d) It looks at behavior of a running program
8) What is known as sandbox ?
a) It is a program which can be molded to do desired task.
b) It is program that is controlled or emulated section of OS
c) It is a special mode of antivirus
d) None of the mentioned
9) 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) Keeping a close watch on employees.
Explanation: Disgruntled employees have in past infected the master copies of software programs to do economic harm to the company.
Sanfoundry Global Education & Learning Series – Operating System.
To practice all areas of Operating System, here is complete set on 1000+ Multiple Choice Questions and Answers on Operating System.