Q1. In a multiprogramming and time-sharing environment, several users share the system simultaneously. This situation can result in various security problems. a. What are two such problems? b. Can we ensure the same degree of security in a time-shared machine as in a dedicated machine? Explain your answer?
Ans1: (a) Stealing or copying a user 's files; writing over another program 's (belonging to another user or to the OS) area in memory; using system resources (CPU, disk space) without proper accounting; causing the printer to mix output by sending data while some other user 's file is printing.
(b)
Probably we cannot assure the same degree of security in a time shared…show more content…
Batch
b. Interactive
c. Time sharing
d. Real time
e. Network
f. Parallel
g. Distributed
h. Clustered
i. Handheld
Ans5:
a. Batch. Jobs with similar needs are batched together and run through the computer as a group by an operator or automatic job sequencer. Performance is increased by attempting to keep CPU and I/O devices busy at all times through buffering, off-line operation, spooling, and multiprogramming. Batch is good for executing large jobs that need little interaction; it can be submitted and picked up later.
b. Interactive. This system is composed of many short transactions where the results of the next transaction may be unpredictable. Response time needs to be short (seconds) since the user submits and waits for the result.
c. Time sharing. This systems uses CPU scheduling and multiprogramming to provide economical interactive use of a system. The CPU switches rapidly from one user to another. Instead of having a job defined by spooled card images, each program reads its next control card from the terminal, and output is normally printed immediately to the screen.
d. Real time. Often used in a dedicated application, this system reads information from sensors and must respond within a fixed amount of time to ensure correct performance.
e. Network. Provides operating system features across a network such as file sharing.
f. SMP. Used in systems where there are multiple CPU's each running the
| A version of the classic Mac OS operating system | |
| Developer | Apple Computer, Inc. |
|---|---|
| OS family | Macintosh |
| Source model | Closed source |
| Released to manufacturing | January 24, 1984; 37 years ago |
| Latest release | 1.1 / December 29, 1984; 36 years ago |
| Kernel type | Monolithic |
| License | Proprietary |
| Succeeded by | System 2 |
| Support status | |
| Archaic, unsupported |
Quiver 3 2 7 unblocked. The Macintosh 'System 1' is the first version of AppleMacintosh operating system and the beginning of the classic Mac OS series. It was developed for the Motorola 68000microprocessor. System 1 was released on January 24, 1984, along with the Macintosh 128K, the first in the Macintosh family of personal computers. It received one update, 'System 1.1' on December 29, 1984, before being succeeded by System 2.[1] Urban war defense mac os.
Features[edit]
This operating system introduced many features that would appear for years to come, some that still exist in the current macOS, and a few that exist in other graphical operating systems such as Microsoft Windows.
Apr 01, 2015 The Mac OS previously ran on PowerPC-based Macs but since 2006 they have ran on Intel. Same as Windows, Mac OS uses a graphical user interface making it easier for the user to use the computer. Linux: Same as Mac OS X, Linux also uses a Unix-based system, however Linux is a completely open source which allows the user to modify their OS. Leopard 100: Introduction to Mac OS X v10.5 1 day Provides an introduction to basic Mac OS X features and interface for those who are new to Mac OS X. Covers the prerequisite knowledge for Leopard 101. https://money-fake-wu-free-bet-kick-casino-online.peatix.com. Leopard 101: Mac OS X Support Essentials v10.5 3 days Provides an intensive and in-depth exploration of troubleshooting on Mac OS X, touring. ITC 3001 Personal Computer Fundamentals Unit 1 Scholarly Activity Stephen Grisham The argument over Mac OS versus Windows has been an increasing argument in the tech community. While Windows made leaps and bounds for more than a decade, Apple was almost non-existent. Get your assignment help services from professionals. Cheap essay writing sercice. If you need professional help with completing any kind of homework, Online Essay Help is the right place to get it.
Sling shot (pixbits) mac os. The features of the operating system included the Finder and menu bar. In addition to this, it popularized the graphical user interface and desktop metaphor, which was used under license from Xerox PARC.
The Macintosh 'System 1' is the first version of Apple Macintosh operating system and the beginning of the classic Mac OS series. It was developed for the Motorola 68000 microprocessor. System 1 was released on January 24, 1984, along with the Macintosh 128K, the first in the Macintosh family of personal computers. It received one update, 'System 1.1' on December 29, 1984, before being.
Due to the limited amount of random-access memory and the lack of an internal hard disk in the original Macintosh, there was no multitasking with multiple applications, although there were desktop accessories that could run while another application was loaded. Also, items in the Trash were permanently deleted when the computer was shut down or an application was loaded (quitting the Finder).
System 1's total size is about 216 KB and contained six files: System (which includes the desk accessories), Finder, Clipboard, an Imagewriter printer driver, Scrapbook, and Note Pad.[2] A separate diskette included 'A Guided Tour of Macintosh', which contains tutorial demonstrations of the Macintosh system, running on a modified pre-release version of Finder 1.0, as well as training programs for learning to use the mouse, and the Finder. Also included was a 33-minute audio cassette designed to run alongside the demonstrations, emphasising the disk's purpose as a guided tour.[3]
Menu bar[edit]
The menu bar was a new and revolutionary part of the OS.[citation needed] Similar to the one found on Lisa OS, the System 1 Finder had five menus: the Apple menu, File, Edit, View, and Special. Flash element td 2 hacked. When in an application, the menus would change to ones defined by the application, but most software retained at least the File and Edit menus.[4]
While within the Finder, the Apple menu contained the 'About the Finder' information, along with the desktop accessories. 'File' menu items included Open, Eject, and Close. 'Edit' had entries for cutting, copying, and pasting. 'Special' was used for managing the hardware and other system functions, and was always the rightmost entry on the menu bar in the Finder. In System 1, the menu had items related to emptying the Trash, cleaning up the desktop, and disk options. By System 1.1, the menu allowed the user to choose an alternate startup program to be run instead of the Finder at boot time; the feature was replaced in System 7 by the 'Startup Items' folder in the System Folder.[citation needed]
Desk accessories[edit]
Mac Os Versions
System 1 came with multiple desk accessories (DA). These included an Alarm Clock, Calculator, Control Panel, Key Caps, Note Pad, Puzzle, and Scrapbook. A difference between desktop accessories and applications is that multiple desktop accessories could be run at once but only one application could run at a time. Desk accessories could also run on top of an application.
- Alarm Clock — This DA could be used just like an alarm clock, as the computer would beep, and the menu bar would flash when the alarm's set time was reached. It could also be used as an easier way to change/set the time and date on the computer. When opened, it would show the time and date set on the computer.
- Calculator — A basic calculator capable of addition, subtraction, multiplication, and division. It featured the basic 18 buttons for input.
- Control Panel — The control panel was used to adjust some of the settings on the computer. What made the original control panel unique from subsequent Mac OS control panels was the intended absence of any text. This was chosen to demonstrate the graphical user interface. Representation was achieved by using symbols. It could be used to adjust settings such as volume, double click speed, mouse sensitivity, and desktop background. On the Macintosh 128K, Macintosh 512K, and the Macintosh Plus, the screen brightness was controlled by a mechanical adjustment wheel beneath the screen.
- Key Caps — A DA used to show the layout of the original Macintosh keyboard. It showed what happened when normal keys were pressed along with special characters (Command, Shift, Option).
- Note Pad — A note taking DA that would save text entered into it on the floppy disk. Multiple note pages could be written when using the folded corner symbol in the bottom left corner of the note page.
- Puzzle — A basic 1-15 slide puzzle, similar to the picture puzzle found in later versions of the Mac OS.
- Scrapbook — This DA was similar to a cut, copy, and paste library. In it, one could store text selections and photos which could then be transferred to other applications.
See also[edit]
References[edit]
- ^Mesa, Andy. 'The Early Mac OS'. The Apple Museum. Retrieved 2015-02-15.
- ^Pogue, David (January 1997). MacWorld Macintosh Secrets 4th Edition - Part 1: System Software Revealed(PDF). Hungry Minds. p. 216.
- ^'First Versions: Apple Mac OS'. First Versions. Retrieved 14 January 2018.
- ^Conachey, Andrew. 'Innovative Macintosh System 1'. Low End Mac. Retrieved 2016-08-15.
External links[edit]
The Macintosh 'System 1' is the first version of Apple Macintosh operating system and the beginning of the classic Mac OS series. It was developed for the Motorola 68000 microprocessor. System 1 was released on January 24, 1984, along with the Macintosh 128K, the first in the Macintosh family of personal computers. It received one update, 'System 1.1' on December 29, 1984, before being.
Due to the limited amount of random-access memory and the lack of an internal hard disk in the original Macintosh, there was no multitasking with multiple applications, although there were desktop accessories that could run while another application was loaded. Also, items in the Trash were permanently deleted when the computer was shut down or an application was loaded (quitting the Finder).
System 1's total size is about 216 KB and contained six files: System (which includes the desk accessories), Finder, Clipboard, an Imagewriter printer driver, Scrapbook, and Note Pad.[2] A separate diskette included 'A Guided Tour of Macintosh', which contains tutorial demonstrations of the Macintosh system, running on a modified pre-release version of Finder 1.0, as well as training programs for learning to use the mouse, and the Finder. Also included was a 33-minute audio cassette designed to run alongside the demonstrations, emphasising the disk's purpose as a guided tour.[3]
Menu bar[edit]
The menu bar was a new and revolutionary part of the OS.[citation needed] Similar to the one found on Lisa OS, the System 1 Finder had five menus: the Apple menu, File, Edit, View, and Special. Flash element td 2 hacked. When in an application, the menus would change to ones defined by the application, but most software retained at least the File and Edit menus.[4]
While within the Finder, the Apple menu contained the 'About the Finder' information, along with the desktop accessories. 'File' menu items included Open, Eject, and Close. 'Edit' had entries for cutting, copying, and pasting. 'Special' was used for managing the hardware and other system functions, and was always the rightmost entry on the menu bar in the Finder. In System 1, the menu had items related to emptying the Trash, cleaning up the desktop, and disk options. By System 1.1, the menu allowed the user to choose an alternate startup program to be run instead of the Finder at boot time; the feature was replaced in System 7 by the 'Startup Items' folder in the System Folder.[citation needed]
Desk accessories[edit]
Mac Os Versions
System 1 came with multiple desk accessories (DA). These included an Alarm Clock, Calculator, Control Panel, Key Caps, Note Pad, Puzzle, and Scrapbook. A difference between desktop accessories and applications is that multiple desktop accessories could be run at once but only one application could run at a time. Desk accessories could also run on top of an application.
- Alarm Clock — This DA could be used just like an alarm clock, as the computer would beep, and the menu bar would flash when the alarm's set time was reached. It could also be used as an easier way to change/set the time and date on the computer. When opened, it would show the time and date set on the computer.
- Calculator — A basic calculator capable of addition, subtraction, multiplication, and division. It featured the basic 18 buttons for input.
- Control Panel — The control panel was used to adjust some of the settings on the computer. What made the original control panel unique from subsequent Mac OS control panels was the intended absence of any text. This was chosen to demonstrate the graphical user interface. Representation was achieved by using symbols. It could be used to adjust settings such as volume, double click speed, mouse sensitivity, and desktop background. On the Macintosh 128K, Macintosh 512K, and the Macintosh Plus, the screen brightness was controlled by a mechanical adjustment wheel beneath the screen.
- Key Caps — A DA used to show the layout of the original Macintosh keyboard. It showed what happened when normal keys were pressed along with special characters (Command, Shift, Option).
- Note Pad — A note taking DA that would save text entered into it on the floppy disk. Multiple note pages could be written when using the folded corner symbol in the bottom left corner of the note page.
- Puzzle — A basic 1-15 slide puzzle, similar to the picture puzzle found in later versions of the Mac OS.
- Scrapbook — This DA was similar to a cut, copy, and paste library. In it, one could store text selections and photos which could then be transferred to other applications.
See also[edit]
References[edit]
- ^Mesa, Andy. 'The Early Mac OS'. The Apple Museum. Retrieved 2015-02-15.
- ^Pogue, David (January 1997). MacWorld Macintosh Secrets 4th Edition - Part 1: System Software Revealed(PDF). Hungry Minds. p. 216.
- ^'First Versions: Apple Mac OS'. First Versions. Retrieved 14 January 2018.
- ^Conachey, Andrew. 'Innovative Macintosh System 1'. Low End Mac. Retrieved 2016-08-15.
External links[edit]
Assignment 1 Mac Os Download
- Macintosh System 1 in your browser – A web-based simulator
- System 1.0 Headquarters — a walkthrough of System 1 with screenshots (from 1998, via archive.org)
Mac Os Mojave
| Preceded by | System 1 1984 | Succeeded by System 2 |
Mac Os Catalina
