Flashcards
Untitled
Cards in this deck (10)
- 1functions of the operating system.-User interface
- Multi-tasking
- security
- memory management
- Peripheral management - 2User Interface-operating system needs to provide means of communicating with them
- This means taking it possible for the user to issue commands
- The user interface is the way in which user interacts with computer hardware
- Can be either Graphical (GUI) or command line. - 3Multi-tasking - A processor can only execute one instruction at a time (assuming it only has one core) - The operating system has to manage all the programs running to make sure each one gets enough processor time- Most system commonly have several programs loaded into memory at the same time.
- The operating system will also be running lots of background tasks just to manage the computer itself. - 4Security - Operating system also handle files privileges, these are right assigned to user and group. - This control who can read / write and execute files.- Operating system usually allow the authentication of users, i.e they can be set up to check that users are who they say they are.
- This normally involves user having ids and password. - 5Memory ManagementManaging program use of memory and pages
- 6File systemManaging files, directories & permision
- 7User ManagementManagement of usernames & password
- 8Device Drivers for I/OManage peripheral hardware input/output
- 9Process managerDecides how to alacate the CPU. Keeps track of the jobs.
- 10Memory ManagerIn charge of the main memory e.g. RAM it will alacet space for the job. DEalacate memory for space
Information
- Description
- Flashcards on Untitled, created by Bayley-Connor Du on 12/12/2014.
- Created by
- Bayley-Connor Du
- Views
- 3
- Rating