Operating System Mcqs

Page No. 94

What is ‘separation’ in security of Operating systems?


aTo have separate login for different users

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bTo have separate Hard disk drive/partition for different users

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

✓


dNone of the mentioned

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Which of the following objects require protection?


aCPU

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bPrinters

✓


cMotherboard

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dAll of the mentioned

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View Answer Printers

Which is an unsolvable problem in access-matrix?


aOwner override

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bBrute force

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cAccess denied

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dConfinement

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View Answer Confinement

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


acopy and transfer

✓


bcopy and owner

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ccopy and owner

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ddeny and copy

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View Answer copy and transfer

What are the three copyrights?


acopy

✖


btransfer

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climited copy

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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

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ccontrol

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dall of the mentioned

✓


View Answer all of the mentioned

What does the access matrix represent?


aRows-Domains, Columns-Objects

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bRows-Objects, Columns-Domains

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cRows-Access List, Columns-Domains

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dRows-Domains, Columns-Access list

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What is Domain?


aDomain = Set of all objects

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bIt is a collection of protection policies

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cDomain= set of access-rights

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dNone of the mentioned

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What is meaning of right-set?


aIt is a subset consist of read and write

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

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cIt is a subset consist of read, write and execute

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dNone of the mentioned

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