Unit 3.1 - Functions and types of operating systems

Unit 3.1 - Functions and types of operating systems

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There are four types of operating systems (p. 38)

• Real-time operating system (RTOS)

• Single-user, single task

• Single-user, multi-tasking

• Multi-user

How operating systems interact with hardware and applications (p. 39)

• Drivers: Drivers are software that is created to allow the computer to connect to other devices. Other devices include printers, sound cards, cell phones and USBs. The drivers issue commands to the device by sending and receiving data to and from the operating system

• Memory management: RAM and ROM are examples of memory. Their function is to take information from a storage device such as the hard drive of a computer to be processed by the CPU. The less memory there is, the slower the processing.

• CPU control: The CPU is the brain of the computer. It determines what and in what order processes should happen on the computer based on what the user wants to do.

• Fans and cooling: Fans prevent the computer from overheating. Overheating can cause permanent damage to the computer.

Typical functions of the operating system (p. 39)

• Activates the computer. This is when the computer starts or restarts

• Performs basic computer tasks such as managing

• Provides a graphical user interface so you can interact with the operating system

• Handles hardware errors and loss of data

• Manages the computer memory

• Handles the organisation and trackng of files and directions

• Keeps track of where files are located on the hard drive

Multiple Select

Choose all the options that are operating systems

• Apple

• Linux

• Windows

• Google

• Pear

Users and user profiles (p. 40)

• A user profile is a directory of stored user settings and other information of a user account. There are different types of user profiles

• Local user profiles

• Roaming user profiles

• Mandatory user profiles

• Temporary user profiles

• How to create accounts are on page 41 (not important)

Read through p. 41 - 44 to answer the following questions

Multiple Choice

1. If an application does not respond, press the keys ... + ... + ... at the same time.

• Alt + Delete + Ctrl

• Ctrl + Alt + Delete

• Ctrl + End + Delete

• Alt + End + Delete

Multiple Choice

2. Switching off the computer clears the ...

• ROM

• RAM

• file system

• operating system

Multiple Choice

3. The shortcut key for logging off the computer is ... + ...

• Alt + F4

• Ctrl + F3

• Ctrl + F4

• Ctrl + F2

Multiple Choice

4. The operating system is loaded from the hard drive in the ...

• RAM

• ROM

• CPU

• BIOS

Multiple Choice

5. In computers, the acronym CPU stands for...

• Computer Power User

• Central Policy Unit

• Central Processing Unit

• Critical Patch Update