Question 1

What are the main drawbacks of the implementation of the access matrix as a global table?

Accepted Answer

The table is usually large and thus cann

Question 2

The owner right allows ___________

Accepted Answer

A)  addition of new rights only 
B)  addition of new rights and removal of some rights 
C)  removal of some rights only 
D)  none of the above 
A)  addition of new rights only 
B)  addition of new rights and removal of some rights 
C)  removal of some rights only 
D)  none of the above

Question 3

How does a lock-key mechanism work?

Accepted Answer

Each object has a list of unique bit pat

Question 4

Describe how the access matrix is implemented in MULTISC.

Accepted Answer

MULTISC uses a combination of access lis

Question 5

What are the main reasons for implementing a protection subsystem?

Accepted Answer

The most obvious is the need to prevent

Question 6

Domains cannot share access rights

Accepted Answer

A) True 
 B)False

Question 7

UNIX operating system associates a protection domain with the ____.

Accepted Answer

A)  task 
B)  tread 
C)  process 
D)  user 
A)  task 
B)  tread 
C)  process 
D)  user

Question 8

Apple's systems employs capability-based protection in the form of entitlements.

Accepted Answer

A) True 
 B)False

Question 9

Role-based access control (RBAC) increases the security risk associated with superusers.

Accepted Answer

A) True 
 B)False

Question 10

The kernel should not run with a higher level of privileges than user processes.

Accepted Answer

A) True 
 B)False

Question 11

In a dynamic protection system, sometimes access rights to objects shared by different users need to be revoked.

Accepted Answer

A) True 
 B)False

Question 12

Android cannot provide the same level of protection as UNIX, because it is not able to separate users.

Accepted Answer

A) True 
 B)False

What are the main drawbacks of the implementation of the access matrix as a global table?

The owner right allows ___________

How does a lock-key mechanism work?

Describe how the access matrix is implemented in MULTISC.

What are the main reasons for implementing a protection subsystem?

Domains cannot share access rights

UNIX operating system associates a protection domain with the ____.

Apple's systems employs capability-based protection in the form of entitlements.

Role-based access control (RBAC) increases the security risk associated with superusers.

The kernel should not run with a higher level of privileges than user processes.

In a dynamic protection system, sometimes access rights to objects shared by different users need to be revoked.

Android cannot provide the same level of protection as UNIX, because it is not able to separate users.

Introduction

Operating-System Structures

Processes

Threads Concurrency

Cpu Scheduling

Synchronization Tools

Synchronization Examples

Deadlocks

Main Memory

Virtual Memory

Mass-Storage Structure

Io Systems

File-System Interface

File-System Implementation

File-System Internals

Security

Filters

Exam 17: Protection

What are the main drawbacks of the implementation of the access matrix as a global table?

The owner right allows ___________

How does a lock-key mechanism work?

Describe how the access matrix is implemented in MULTISC.

What are the main reasons for implementing a protection subsystem?

Domains cannot share access rights

UNIX operating system associates a protection domain with the ____.

Apple's systems employs capability-based protection in the form of entitlements.

Role-based access control (RBAC) increases the security risk associated with superusers.

The kernel should not run with a higher level of privileges than user processes.

In a dynamic protection system, sometimes access rights to objects shared by different users need to be revoked.

Android cannot provide the same level of protection as UNIX, because it is not able to separate users.

Introduction

Operating-System Structures

Processes

Threads Concurrency

Cpu Scheduling

Synchronization Tools

Synchronization Examples

Deadlocks

Main Memory

Virtual Memory

Mass-Storage Structure

Io Systems

File-System Interface

File-System Implementation

File-System Internals

Security

Filters