Topic 7 - Types Of Operating Systems Flashcards
What is a operating system?
The operating system is what coordinates all the operations on your company
What does an operating system manage?
It manages all the resources on the computer, such as the CPU and and controls the software and hardware. WIthout it, your PC would be useless
What is Real-time operating systems (RTOS) ?
Real time operating systesm is when inputs are processed and responded to instaneously
Why choice real-time operating system?
It provides fast response
It is the best used where inputs must be processed and reponded to immediately, such as traffic light and air traffic control systems
Example of RTOS and whats is the process?
Automatic braking system (ABS) are an example of a RTOS
The system continuously processes input data to detect obstacles and apply the brakes to avoid collision as required
What does SIngle-user single task operating systems mean?
Single-user single tak means that one user can use the system at a time, and one application can run at a time.
Why choose single-user single task?
It requires fewer resources
It is the best used on devices that have limited processing and memory, which could not, handle running mutiple applications, for example basic mobile phones or a simple handhelp game ( such as a Virtual Pet)
What does Single-user multitasking operating systems mean?
One user can use the sytem at a time, but many applications can run simultaneously
Why choose single-user mulitasking?
It allows the user to use serveral applications at once
It is best used on system where a user needs to be able to switch quickly between applications, for example an office worker using a laptop or desktop PC.
What does Muliti-user operating system mean?
Multi-user operating system means that many users can use the system at the same time and can run many applications simultaneously
Why choose muti-user?
Processing and resources can be shared by multiple-users
It is the best used where many users need access to the same processing or recources at the same time, for example web servers
What do operating systems performace factor require?
Operating systems require careful maintenance to keep them performing efficiently.
What are the Hardware factors affecting performance?
Limited CPU speed
Limited RAM capacity
Number of cores
Slow hard-disk read / write (fragmentation)
What are the Malware factors affecting performance?
Viruses
Worms
Spyware
What are the Virtual memory factors affecting performance?
Not enough HDD spaces allocated to extend RAM
(pagefile too small - the pagefile is a section of the hard disk that is reserved as an extension of the RAM)
Heavy use of vitual memory relies on slow disc transfers rather than the very fast working memory (RAM) data transfers
