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Welcome to the Protection and Security MCQs Page

Dive deep into the fascinating world of Protection and Security with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Protection and Security, a crucial aspect of Operating System. In this section, you will encounter a diverse range of MCQs that cover various aspects of Protection and Security, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Operating System.

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Check out the MCQs below to embark on an enriching journey through Protection and Security. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Operating System.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Protection and Security. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Protection and Security MCQs | Page 13 of 14

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Q121.
What is incorrect methods of revocation of access rights ?

a.

Immediate/Delayed

b.

Selective/General

c.

Partial/total

d.

Crucial

Discuss
Answer: (d).Crucial
Q122.
Why is it difficult to revoke capabilities ?

a.

They are too many

b.

They are not defined precicely

c.

They are distributed throughout the system

d.

None of the mentioned

Discuss
Answer: (c).They are distributed throughout the system
Q123.
What is reaquisition scheme to revoke capability ?

a.

When a process’s capability is revoked then it wont be able to reacquire it

b.

Pointers are maintained for each object which can be used to revoke

c.

Indirect pointing is done to revoke object’s capabilities

d.

Master key can be used compare and revoke.

Discuss
Answer: (a).When a process’s capability is revoked then it wont be able to reacquire it
Q124.
What is false regarding Back-Pointers scheme to revoke capability ?

a.

List of pointers is maintained with each object

b.

When revocation is required these pointers are followed

c.

This scheme is not adopted in MULTICS system

d.

These point to all capabilities associated with that object

Discuss
Answer: (c).This scheme is not adopted in MULTICS system
Q125.
What is true about Indirection to revoke capability ?

a.

Capabilities point indirectly to the objects

b.

Each capability will not have a unique entry in global

c.

Table entries cannot be reused for other capabilities

d.

This system was adopted in MULTICS system

Discuss
Answer: (a).Capabilities point indirectly to the objects
Q126.
How can Keys be defined or replaced ?

a.

create [keyname] [bits].

b.

set-key

c.

Key

d.

MAKE [Key Name].

Discuss
Answer: (b).set-key
Q127.
What are characteristics of Hydra system ?

a.

It consist of known access rights and interpreted by the system

b.

A user can of protection system can declare other rights

c.

Hydra system is not flexible

d.

Hydra doesn’t provide rights amplification

Discuss
Answer: (a).It consist of known access rights and interpreted by the system
Q128.
What are characteristics of rights amplification in Hydra ?

a.

This scheme allows a procedure to be certified as trustworthy

b.

Amplification of rights cannot be stated explicitly in declaration

c.

It includes kernel rights such as read

d.

All of the mentioned

Discuss
Answer: (a).This scheme allows a procedure to be certified as trustworthy
Q129.
What is the problem of mutually suspicious subsystem ?

a.

Service program can steal users data

b.

Service program can malfunction and retain some rights of data provided by user

c.

Calling program can get access to restricted portion from service program

d.

Calling program gets unrestricted access

Discuss
Answer: (b).Service program can malfunction and retain some rights of data provided by user
Q130.
What are characteristics of Cambridge CAP system as compared to Hydra system ?

a.

It is simpler and less powerful than hydra system

b.

It is more powerful than hydra system

c.

It is powerful than hydra system

d.

It is not as secure as Hydra system

Discuss
Answer: (a).It is simpler and less powerful than hydra system
Page 13 of 14

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