Operating Systems 2015F: Assignment 2: Difference between revisions

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==Solutions==
==Solutions==


* device driver
Code that runs in the kernel and abstracts access to a specific piece of hardware.


* kernel module
device driver
Code that is loaded into to the kernel at runtime in order to add (or change) kernel functionality.
* Code that runs in the kernel and abstracts access to a specific piece of hardware.


* character device
kernel module
A UNIX device abstraction that allows byte-level access to hardware (input and/or output).  It is often used today to represent keyboards, mice, and printers.
* Code that is loaded into to the kernel at runtime in order to add (or change) kernel functionality.


* block device
character device
A UNIX device abstraction that is primarily used for persistent storage devices.
* A UNIX device abstraction that allows byte-level access to hardware (input and/or output).  It is often used today to represent keyboards, mice, and printers.


* NONE
block device
A device for determining how trustworthy a person is.
* A UNIX device abstraction that is primarily used for persistent storage devices.


* make
NONE
A program that directs the compilation of other programs.
* A device for determining how trustworthy a person is.


* root filesystem
make
A set of files and directories that must exist on every UNIX system.
* A program that directs the compilation of other programs.


* fsck
root filesystem
If you have to interact with this program, files may have been corrupted.
* A set of files and directories that must exist on every UNIX system.


* NONE
fsck
The home directory of the root user.
* If you have to interact with this program, files may have been corrupted.


* root user
NONE
The user account on a UNIX system with the highest level of privileges.
* The home directory of the root user.


* NONE
root user
The default configuration of a user account on a UNIX system.
T* he user account on a UNIX system with the highest level of privileges.


* superblock
NONE
The block that stores metadata about a filesystem needed to properly mount it.
* The default configuration of a user account on a UNIX system.


* NONE
superblock
The block that stores most of the data in a file.
* The block that stores metadata about a filesystem needed to properly mount it.


* inode
NONE
An on-disk data structure that stores file metadata including length, modification times, and ownership information.
* The block that stores most of the data in a file.


* extents
inode
Sequential ranges of blocks used to store file data.
* An on-disk data structure that stores file metadata including length, modification times, and ownership information.


* logical size of a file
extents
The size of a file as seen by a program accessing that file.
* Sequential ranges of blocks used to store file data.


* NONE
logical size of a file
The size of the disk space consumed by a file.
T* he size of a file as seen by a program accessing that file.


* kernel oops
NONE
Happens when the kernel detects an internal error, such as access to an illegal memory location, that can generally be recovered from.
* The size of the disk space consumed by a file.


* pseudo tty
kernel oops
A UNIX device that virtualizes keyboard input and text output.
* Happens when the kernel detects an internal error, such as access to an illegal memory location, that can generally be recovered from.


* /proc
pseudo tty
A virtual filesystem that allows access to kernel state in mostly human-readable formats.
* A UNIX device that virtualizes keyboard input and text output.


* /sys
/proc
A virtual filesystem that allows access to kernel state where every file stores exactly one value.
* A virtual filesystem that allows access to kernel state in mostly human-readable formats.


* /dev
/sys
The part of the filesystem normally used to give names to connected hardware.
* A virtual filesystem that allows access to kernel state where every file stores exactly one value.


* mount
/dev
Command to make the contents of a filesystem accessible.
* The part of the filesystem normally used to give names to connected hardware.


* lsmod
mount
A command for listing the modules loaded into the kernel.
* Command to make the contents of a filesystem accessible.


* NONE
lsmod
A command that lists the recently modified files in a directory.
* A command for listing the modules loaded into the kernel.


* rmmod
NONE
Command that unloads a module from the currently running kernel.
* A command that lists the recently modified files in a directory.


* NONE
rmmod
Command to delete recently modified files in the current directory.
* Command that unloads a module from the currently running kernel.
 
NONE
* Command to delete recently modified files in the current directory.

Revision as of 19:03, 3 October 2015

This assignment is due by 11:59 PM on Wednesday, September 30, 2015 on cuLearn.

Choose the appropriate definition for the following terms:

  1. device driver
  2. kernel module
  3. character device
  4. block device
  5. make
  6. root filesystem
  7. fsck
  8. root user
  9. superblock
  10. inode
  11. extents
  12. logical size of a file
  13. kernel oops
  14. pseudo tty
  15. /proc
  16. /sys
  17. /dev
  18. mount
  19. lsmod

(rmmod was on the list but it didn't get added to the quiz unfortunately.)

Definitions:

  1. If you have to interact with this program, files may have been corrupted.
  2. Command to delete recently modified files in the current directory.
  3. The size of the disk space consumed by a file.
  4. Sequential ranges of blocks used to store file data.
  5. Code that runs in the kernel and abstracts access to a specific piece of hardware.
  6. A UNIX device abstraction that is primarily used for persistent storage devices.
  7. The block that stores most of the data in a file.
  8. A set of files and directories that must exist on every UNIX system.
  9. The default configuration of a user account on a UNIX system.
  10. The block that stores metadata about a filesystem needed to properly mount it.
  11. An on-disk data structure that stores file metadata including length, modification times, and ownership information.
  12. A virtual filesystem that allows access to kernel state where every file stores exactly one value.
  13. Code that is loaded into to the kernel at runtime in order to add (or change) kernel functionality.
  14. A device for determining how trustworthy a person is.
  15. The home directory of the root user.
  16. Happens when the kernel detects an internal error, such as access to an illegal memory location, that can generally be recovered from.
  17. A UNIX device that virtualizes keyboard input and text output.
  18. A command for listing the modules loaded into the kernel.
  19. Command to make the contents of a filesystem accessible.
  20. The size of a file as seen by a program accessing that file.
  21. A command that lists the recently modified files in a directory.
  22. A UNIX device abstraction that allows byte-level access to hardware (input and/or output). It is often used today to represent keyboards, mice, and printers.
  23. Command that unloads a module from the currently running kernel.
  24. The part of the filesystem normally used to give names to connected hardware.
  25. A program that directs the compilation of other programs.
  26. A virtual filesystem that allows access to kernel state in mostly human-readable formats.
  27. The user account on a UNIX system with the highest level of privileges.

Solutions

device driver

  • Code that runs in the kernel and abstracts access to a specific piece of hardware.

kernel module

  • Code that is loaded into to the kernel at runtime in order to add (or change) kernel functionality.

character device

  • A UNIX device abstraction that allows byte-level access to hardware (input and/or output). It is often used today to represent keyboards, mice, and printers.

block device

  • A UNIX device abstraction that is primarily used for persistent storage devices.

NONE

  • A device for determining how trustworthy a person is.

make

  • A program that directs the compilation of other programs.

root filesystem

  • A set of files and directories that must exist on every UNIX system.

fsck

  • If you have to interact with this program, files may have been corrupted.

NONE

  • The home directory of the root user.

root user T* he user account on a UNIX system with the highest level of privileges.

NONE

  • The default configuration of a user account on a UNIX system.

superblock

  • The block that stores metadata about a filesystem needed to properly mount it.

NONE

  • The block that stores most of the data in a file.

inode

  • An on-disk data structure that stores file metadata including length, modification times, and ownership information.

extents

  • Sequential ranges of blocks used to store file data.

logical size of a file T* he size of a file as seen by a program accessing that file.

NONE

  • The size of the disk space consumed by a file.

kernel oops

  • Happens when the kernel detects an internal error, such as access to an illegal memory location, that can generally be recovered from.

pseudo tty

  • A UNIX device that virtualizes keyboard input and text output.

/proc

  • A virtual filesystem that allows access to kernel state in mostly human-readable formats.

/sys

  • A virtual filesystem that allows access to kernel state where every file stores exactly one value.

/dev

  • The part of the filesystem normally used to give names to connected hardware.

mount

  • Command to make the contents of a filesystem accessible.

lsmod

  • A command for listing the modules loaded into the kernel.

NONE

  • A command that lists the recently modified files in a directory.

rmmod

  • Command that unloads a module from the currently running kernel.

NONE

  • Command to delete recently modified files in the current directory.