Operating System Mcqs

Page No. 94

What is ‘separation’ in security of Operating systems?


aTo have separate login for different users


bTo have separate Hard disk drive/partition for different users


cIt means keeping one user’s objects separate from other users


dNone of the mentioned



Which of the following objects require protection?


aCPU


bPrinters


cMotherboard


dAll of the mentioned


View Answer Printers

Which is an unsolvable problem in access-matrix?


aOwner override


bBrute force


cAccess denied


dConfinement


View Answer Confinement

Which two rights allow a process to change the entries in a column?


acopy and transfer


bcopy and owner


ccopy and owner


ddeny and copy


View Answer copy and transfer

What are the three copyrights?


acopy


btransfer


climited copy


dall of the mentioned


View Answer all of the mentioned

Who can add new rights and remove some rights?


acopy


btransfer


climited copy


downer


View Answer owner

What are the three additional operations to change the contents of the access-matrix?


acopy


bOwner


ccontrol


dall of the mentioned


View Answer all of the mentioned

What does the access matrix represent?


aRows-Domains, Columns-Objects


bRows-Objects, Columns-Domains


cRows-Access List, Columns-Domains


dRows-Domains, Columns-Access list



What is Domain?


aDomain = Set of all objects


bIt is a collection of protection policies


cDomain= set of access-rights


dNone of the mentioned



What is meaning of right-set?


aIt is a subset consist of read and write


bIt is a subset of all valid operations that can be performed on the object


cIt is a subset consist of read, write and execute


dNone of the mentioned



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