IT2625

An operating System can be thought of as Resource Allocator and Control Program
True
False
The operating system manages the different computer resources such as CPU time, memory space, file storage space, I/O devices, etc. And allocates them to different application programs and users.
Control Program
Resource Allocator
Control Program - it controls the execution of programs and the various I/O devices.
True
False
An operating system provides the following services for users:
Program Execution
I/O Operations
File System Handling
Error Detection
Year UNIX developed by AT&T Bell Labs
1969
1963
Linux – Linus Torvalds
True
False
Linux has different versions:
Ubuntu
Suse
Red Hat
Debain
Organizes information on the computer
Shell
Kernel
File system
Kernel, Shell, Commands and Utilities, Files and Directories - Four Basics that unites all the versions of Unix
True
False
Provides a user interface to the computer
Shell
Kernel
File System
Manages the operation of the computer
Shell
Kernel
File System
Subdirectory
Location for other files and subdirectories
Group of directories that can be thought of as a separate tree structure
Any directory below another directory
Contained in directories and subdirectories
Files
Location for other files and subdirectories
Group of directories that can be thought of as a separate tree structure
Any directory below another directory
Contained in directories and subdirectories
File System
Location for other files and subdirectories
Group of directories that can be thought of as a separate tree structure
Any directory below another directory
Contained in directories and subdirectories
Applications and third party applications
/usr directory
/opt (optional) directory
/dev (devices) directory
/etc (etcetera) directory
Files which are pointers to device names
/usr directory
/opt (optional) directory
/dev (devices) directory
/etc (etcetera) directory
system admin files (passwd file)
/usr directory
/opt (optional) directory
/dev (devices) directory
/etc (etcetera) directory
/var (variable) directory
/kernel directory
/var (variable) directory
Basic operating system files (main UNIX kernel genunix)
/kernel directory
/var (variable) directory
Bourne shell ($)
Provides a UNIX system command interpreter
Added features such as aliasing and history
Korn shell ($)
Supports a programmable interface to develop shell programs
Supports a programmable interface to develop shell programs
Supports a programmable interface to develop shell programs
C shell (%)
Based on the C programming language
Similar to Korn shell
POSIX shell
It supporst command history, line editing, file name completion, aliasing, and job control Shell cont..
It supporst command history, line editing, file name completion, aliasing, and job control Shell cont..
Similar to Korn shell
Based on the C programming language
 
There are three basic types of files
True
False
Ordinary Files
An ordinary file is a file on the system that contains data, text, or program instructions.
Directories store both special and ordinary files. For users familiar with Windows or Mac OS, Unix directories are equivalent to folders.
Some special files provide access to hardware such as hard drives, CD- ROM drives, modems, and Ethernet adapters. Other special files are similar to aliases or shortcuts and enable you to access a single file using different names.
Special Files
An ordinary file is a file on the system that contains data, text, or program instructions.
Directories store both special and ordinary files. For users familiar with Windows or Mac OS, Unix directories are equivalent to folders.
Some special files provide access to hardware such as hard drives, CD- ROM drives, modems, and Ethernet adapters. Other special files are similar to aliases or shortcuts and enable you to access a single file using different names.
Directories
An ordinary file is a file on the system that contains data, text, or program instructions.
Directories store both special and ordinary files. For users familiar with Windows or Mac OS, Unix directories are equivalent to folders.
Some special files provide access to hardware such as hard drives, CD- ROM drives, modems, and Ethernet adapters. Other special files are similar to aliases or shortcuts and enable you to access a single file using different names.
{"name":"IT2625", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"An operating System can be thought of as Resource Allocator and Control Program, the operating system manages the different computer resources such as CPU time, memory space, file storage space, I\/O devices, etc. and allocates them to different application programs and users., Control Program - it controls the execution of programs and the various I\/O devices.","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}
Powered by: Quiz Maker