Question 1

All file systems suffer from internal fragmentation.

Accepted Answer

A) True 
 B)False

Question 2

ACL (access-control list) is associated with each file and directory. It

Accepted Answer

A)  specifies user names and types of access allowed for each of them 
B)  includes user names only 
C)  includes types of access allowed for the file only 
D)  contains user names and their encrypted passwords 
A)  specifies user names and types of access allowed for each of them 
B)  includes user names only 
C)  includes types of access allowed for the file only 
D)  contains user names and their encrypted passwords

Question 3

How does MS Windows API implement shared memory using memory-mapped files?

Accepted Answer

The general outline for creating a regio

Question 4

In the case of UNIX, where sharing is implemented by symbolic link________________________

Accepted Answer

A)  the deletion of link does not affect the original file 
B)  the deletion of the original file does not remove the link, but it is dangling 
C)  both of the above 
D)  none of the above 
A)  the deletion of link does not affect the original file 
B)  the deletion of the original file does not remove the link, but it is dangling 
C)  both of the above 
D)  none of the above

Question 5

What are the differences between per-process open-file table and a system-wide open-file table?

Accepted Answer

The operating system uses two levels of

Question 6

IBM's indexed sequential access method (ISAM)__________________________.

Accepted Answer

A)  uses an index file for sequential access 
B)  uses a small master index (kept in memory) that points to disk blocks of a secondary index, while the secondary index blocks point to the actual file blocks 
C)  use the pointers (kept in memory) of the actual file blocks 
D)  uses the pointers (kept in memory) that points to disk blocks of a master index which points to disk blocks of a secondary index, while the secondary index blocks point to the actual file blocks 
A)  uses an index file for sequential access 
B)  uses a small master index (kept in memory) that points to disk blocks of a secondary index, while the secondary index blocks point to the actual file blocks 
C)  use the pointers (kept in memory) of the actual file blocks 
D)  uses the pointers (kept in memory) that points to disk blocks of a master index which points to disk blocks of a secondary index, while the secondary index blocks point to the actual file blocks

Question 7

Acyclic-graph directory structure_______________________

Accepted Answer

A)  prohibits the sharing of files and directories 
B)  prohibits the sharing of files, but allows to share directories 
C)  allows to share files and directories 
D)  allows the sharing of files, but prohibits to share directories 
A)  prohibits the sharing of files and directories 
B)  prohibits the sharing of files, but allows to share directories 
C)  allows to share files and directories 
D)  allows the sharing of files, but prohibits to share directories

Question 8

File's _______ is a unique tag identifies the file within the file system.

Accepted Answer

A)  type 
B)  location 
C)  identifier 
D)  name 
A)  type 
B)  location 
C)  identifier 
D)  name

Question 9

A two-level directory can be thought as a tree of height _________

Accepted Answer

A)  2 and its root is UFD 
B)  1 and its root is MFD 
C)  2 and its root is MFD 
D)  1 and its root is UFD 
A)  2 and its root is UFD 
B)  1 and its root is MFD 
C)  2 and its root is MFD 
D)  1 and its root is UFD

Question 10

The current directory is

Accepted Answer

A)  always included in the search path 
B)  represented by the symbol ".." 
C)  may be included in the search path 
D)  none of the above 
A)  always included in the search path 
B)  represented by the symbol ".." 
C)  may be included in the search path 
D)  none of the above

Question 11

Writes to the file mapped in memory are not necessarily immediate writes to the file on disk

Accepted Answer

A) True 
 B)False

Question 12

What is the internal representation of a directory in tree-structured directory?

Accepted Answer

A directory (or subdirectory) contains a

Question 13

All operating systems have to support at least one file structure.

Accepted Answer

A) True 
 B)False

Question 14

What is the main disadvantage of having the operating system support multiple file structures?

Accepted Answer

Supporting multiple file structures make

Question 15

Systems that do not permit access to the files of another user do not need protection

Accepted Answer

A) True 
 B)False

Question 16

Because all file systems suffer from internal fragmentation, the following relation is true:

Accepted Answer

A)  the larger block size, the greater the internal fragmentation 
B)  the smaller block size, the greater the internal fragmentation 
C)  the larger block size, the smaller internal fragmentation 
D)  there is no relation between block size and internal fragmentation 
A)  the larger block size, the greater the internal fragmentation 
B)  the smaller block size, the greater the internal fragmentation 
C)  the larger block size, the smaller internal fragmentation 
D)  there is no relation between block size and internal fragmentation

Question 17

In the two-level directory, if a user refers to a particular file then__________________

Accepted Answer

A)  only his/her own UFD (user file directory) is searched 
B)  only MFD (master file directory) is searched 
C)  first UFD (user file directory) is searched, then MFD (master file directory) 
D)  first MFD (master file directory) is searched, then UFD (user file directory) 
A)  only his/her own UFD (user file directory) is searched 
B)  only MFD (master file directory) is searched 
C)  first UFD (user file directory) is searched, then MFD (master file directory) 
D)  first MFD (master file directory) is searched, then UFD (user file directory)

Question 18

When the shared lock is applied to a file then ____________

Accepted Answer

A)  several processes can acquire the lock concurrently 
B)  only one process can use this file 
C)  many processes can read and write to this file concurrently 
D)  many processes can write to this file concurrently 
A)  several processes can acquire the lock concurrently 
B)  only one process can use this file 
C)  many processes can read and write to this file concurrently 
D)  many processes can write to this file concurrently

Question 19

Describe the file protection method use by the UNIX system.

Accepted Answer

In the UNIX system, three fields (owner,

Question 20

Is the set of the file's attributes the same for each operating system?

Accepted Answer

A) True 
 B)False

All file systems suffer from internal fragmentation.

ACL (access-control list) is associated with each file and directory. It

How does MS Windows API implement shared memory using memory-mapped files?

In the case of UNIX, where sharing is implemented by symbolic link________________________

What are the differences between per-process open-file table and a system-wide open-file table?

IBM's indexed sequential access method (ISAM)__________________________.

Acyclic-graph directory structure_______________________

File's _______ is a unique tag identifies the file within the file system.

A two-level directory can be thought as a tree of height _________

The current directory is

Writes to the file mapped in memory are not necessarily immediate writes to the file on disk

What is the internal representation of a directory in tree-structured directory?

All operating systems have to support at least one file structure.

What is the main disadvantage of having the operating system support multiple file structures?

Systems that do not permit access to the files of another user do not need protection

Because all file systems suffer from internal fragmentation, the following relation is true:

In the two-level directory, if a user refers to a particular file then__________________

When the shared lock is applied to a file then ____________

Describe the file protection method use by the UNIX system.

Is the set of the file's attributes the same for each operating system?

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 Implementation

File-System Internals

Security

Protection

Filters

Exam 13: File-System Interface

All file systems suffer from internal fragmentation.

ACL (access-control list) is associated with each file and directory. It

How does MS Windows API implement shared memory using memory-mapped files?

In the case of UNIX, where sharing is implemented by symbolic link________________________

What are the differences between per-process open-file table and a system-wide open-file table?

IBM's indexed sequential access method (ISAM)__________________________.

Acyclic-graph directory structure_______________________

File's _______ is a unique tag identifies the file within the file system.

A two-level directory can be thought as a tree of height _________

The current directory is

Writes to the file mapped in memory are not necessarily immediate writes to the file on disk

What is the internal representation of a directory in tree-structured directory?

All operating systems have to support at least one file structure.

What is the main disadvantage of having the operating system support multiple file structures?

Systems that do not permit access to the files of another user do not need protection

Because all file systems suffer from internal fragmentation, the following relation is true:

In the two-level directory, if a user refers to a particular file then__________________

When the shared lock is applied to a file then ____________

Describe the file protection method use by the UNIX system.

Is the set of the file's attributes the same for each operating system?

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 Implementation

File-System Internals

Security

Protection

Filters