Solved MCQ of Computer Security set -1 1. In computer security, ……………………. means that computer system assets can be modified only by authorized parities. A) Confidentiality Confidentiality B) Integrity C) Availability ) Authenticity !. In computer security, …………………….. means that the information in a computer system only be accessible accessible for reading by authorized parities. A) Confidentiality Confidentiality B) Integrity C) Availability ) Authenticity
". #he type of threats on the security of a computer system or net$or% are …………………….. i) Interruption Interruption ii) Interception Interception iii) &odification iv) Creation v) 'abrication A) i, ii, iii and iv only B) ii, iii, iv and v only C) i, ii, iii and v only ) All i, ii, iii, iv and v (. hich of the follo$ing is independent malicious program that need not any host program* A) #rap doors B) #ro+an horse C) irus ) orm -. #he ……….. is code that recognizes some special seuence of input or is triggered by being run from a certain user I of by unli%ely seuence of events. A) #rap doors B) #ro+an horse C) /ogic Bomb ) irus 0. #he …………….. is code embedded in some legitimate program that is set to e2plode3 $hen certain conditions are met. A) #rap doors B) #ro+an horse C) /ogic Bomb ) irus 4. hich of the follo$ing malicious program do not replicate automatically* A) #ro+an 5orse
B) irus C) orm ) 6ombie 7. …………… programs can be used to accomplish functions indirectly that an unauthorized user could not accomplish directly. A) 6ombie B) orm C) #ro+an 5orses ) /ogic Bomb 8. 9tate $hether true of false. i) A $orm mails a copy of itself to other systems. ii) A $orm e2ecutes a copy of itself on another system. system. A) #rue, 'alse B) 'alse, #rue C) #rue, #rue ) 'alse, 'alse 1:. A ………….. is a program that can infect other programs by modifying them, the modification includes a copy of the virus program, $hich can go on to infect other programs. A) orm B) irus C) 6ombie ) #rap doors Answers:
1. 2. 3. 4. 5.
B) Integrity A) Confidentiality C) i, ii, iii and v only D) Worm A) Trap door
C) !ogi" Bom# A) Tro$an %ore C) Tro$an %ore C) Tr&e, Tr&e 1'. B) (ir&
MCQ of Computer Security with answer set – 2 1. …………….. are used in denial of service attac%s, typically against targeted $eb sites. A) orm B) 6ombie C) irus ) #ro+an horse !. 9elect the correct order for the different phases of virus e2ecution. i) ;ropagation phase ii) ormant phase iii) <2ecution phase iv) #riggering phase A) i, ii, iii, and iv B) i, iii, ii and iv C) ii, i, iv an iii
) ii, iii, iv and i
". A ………………… attaches itself to e2ecutable files and replicates, $hen the infected program is e2ecuted, by finding other e2ecutable files to infect. A) 9tealth virus B) ;olymorphic irus C) ;arasitic irus ) &acro irus (. …………………….. is a form of virus e2plicitly designed to hide itself from detection by antivirus soft$are. A) 9tealth virus B) ;olymorphic irus C) ;arasitic irus ) &acro irus -. A …………………….. …………………….. creates copies during replication that are functionally euivalent but have distinctly different bit patterns. A) Boot 9ector irus B) ;olymorphic irus C) ;arasitic irus ) &acro irus 0. A portion of the ;olymorphic virus, generally called a …………………….. …………………….. , creates, a random encryption, %ey to encrypt the remainder of the virus. A) mutual engine B) mutation engine C) multiple engine ) polymorphic engine 4. 9tate $hether the follo$ing statement is true. i) A macro virus is platform independent. ii) &acro viruses infect documents, not e2ecutable portions of code. A) i=only B) ii=only C) Both i and ii ) >on i and ii 7. #he type?s) of auto e2ecuting macros, in &icrosoft $ord is@are A) Auto e2ecute B) Auto macro C) Command macro ) All of the above 8. In …………….., the virus places an identical copy of itself into other programs or into certain system areas on the dis%. A) ormant phase B) ;ropagation phase C) #riggering phase
) <2ecution phase 1:. A ……………… is a program that secretly ta%es over another Internet=attached computer and then uses that computer to launch attac%s. A) orm B) 6ombie C) irus ) #rap doors Answers:
1. 2. 3. 4. 5.
B) om#ie C) ii, i, iv an iii C) *araiti" (ir& A) +tealt vir& B) *olymorpi" (ir&
B) m&tation engine C) Bot i and ii D) All of te a#ove B) *ropagation pae 1'. B) om#ie
