Karteikarten
Unit 3 : Software
Karten in diesem Stapel (34)
- 1System SoftwareActs as a middle man between the applications and hardware. Hides complex hardware.
- 2Operating SystemMain part of system software.
Acts as an interface between hardware, applications and the user.
Contains Kernel which deals directly with the hardware. - 3User InterfaceCommand Line uses commands. Powerful.
GUI uses icons. Simple.
Some interfaces use touch screens or natural speech for inputs. - 4Memory ManagementOperating software makes sure memory is used efficiently and securely
Memory is divided into 'pages' - 5Virtual MemoryUses secondary storage.
Divides large program into modules.
When a module is needed it is sent to RAM and swapped with one not in use. - 6Peripheral ManagementControls files on secondary storage.
Data Files=Word Document
Program File=Application
Configuration File=Windows - 7Fragmentation and DefragmentationFragmentation splits up a file into segments which are placed in blocks of storage.
Each block contains info about where to find the next block, but it takes a while to read and write these files.
Defragmentation moves blocks so they are closer and access is quicker - 8Device DriversControl inputs and outputs so the operating system can communicate with them
- 9MultitaskingOperating system ensures CPU is in use at all times, almost simultaneously jumping between tasks and shares resources.
- 10MUMPSBasic Operating System Functions
Memory Management
User Interface
Multi Tasking
Peripheral Management
Security - 11Files and DirectoriesFiles stored in file system. Directory s a group of files, or a folder..
File extensions indicate the type of file
File attributes include info such as creation date - 12Application SoftwareApps that the user uses for real world tasks
- 13Utility SoftwareCarry out limited maintenance tasks
- 14Types of Utility SoftwareSecurity
Disk Operations
System Maintenance - 15SecurityAntivirus - removes viruses
Spyware Protection-stops programs tracking you
Firewall-stops unauthorised access - 16Disk OperationsFormatting-prepares secondary storage for data
File Transfer - copies files across networks or storage mediums
Defragmentation - reorganises files - 17System MaintenanceSystem Info and Diagnosis- checks for programs
Clean Up Tools-gets rid of unused programs and cookies
Automatic Updating-checks for updates - 18VirusesPrograms that replicate themselves, damaging files, controlling the computer and retrieving confidential data
- 19AuthenticationChecks users are who they say they are with passwords and usernames
- 20PrivlegesWhether a user can read, write, or execute
- 21EncryptionThat they are transformed so that an unauthorised person cannot understand them
- 22Programming SoftwareText Editors eg Notepad. Used to write source code and edit configuration files
Linkers-combine modules of code into one executable program
Interpreters- convert commands into machine code - 23What is Custom Written software?What is Custom Written software?
- 24Advantages of Custom Written Software?-Has exactly the right features
-Does not need adapting to the user
-Maintenance can be performed by the developer - 25Disadvantages of Custom Written Software?-Not Tested Extensively
-Expensive
-Long time to make - 26What is Off the Shelf software?Software bought from a supplier ready to install. eg Windows
- 27Advantages of Off The Shelf Software?-Ready Immediately
-Extensively Tested
-Online forums to help with maintenance
-Low Cost - 28Disadvantages of Off The Shelf Software?-Won't meet needs precisely
-Customer may not know how to use it - 29What is Open Source Software?Software placed in public domain by programmers. eg Linux
- 30Advantages of Open Source Software?-Cheap
-Customisable
-Reliable and Efficient due to large amount of people working on and testing it - 31Disadvantages of Open Source Software?-No Maintenance
-No helpline
-Irregular Updates
-Not suited to hardware - 32What is Proprietary Software?Software developed for profit by a company
- 33Advantages of Proprietary Software?-Customer service for help
-Extensively tested
-Updated regularly - 34Disadvantages of Proprietary Software?-Expensive
-Incompatible with other software
-Inflexible
Informationen
- Beschreibung
- Computing Revision Karteikarten am Unit 3 : Software, erstellt von Andrew Stonehouse am 23/04/2017.
- Erstellt von
- Andrew Stonehouse
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