Untitled Quiz

Study Notes

A computer is an electronic device that stores, retrieves, and processes data.
It is a machine that allows users to input data, process it, store it, and output the results.
It has four basic components: CPU, Memory, Input device, Output device.

Input Devices: Allow data to be entered into the computer for the CPU to execute. Examples include keyboard, mouse, microphone, scanner, and barcode scanner.
Output Devices: Display results from the CPU to the user. Examples include monitor, printer, speaker, and headphones.
Storage: Holds data, instructions, and information for future use.
External Storage: Stores data permanently, even when the computer is turned off. Examples include hard disks, thumb drives, optical disks, and tapes.
Memory: Stores data that is lost when the computer shuts down. It is faster than external storage, but more expensive.

Personal Computer (PC): Most common type of computer, usually used by a single user. Examples include IBM PC, Dell, HP, Apple, Asus, Lenovo.
Notebook / Laptop: A portable version of a PC with similar capabilities.
Tablet PC: A portable computer with touchscreen input, usually using a stylus or voice.
Workstation: A powerful computer used by scientists, researchers, and graphics-intensive users.
Mainframe: A large computer used by organizations to process huge amounts of data. It can handle millions of transactions per second.
Supercomputer: The most powerful type of computer, used for complex calculations in scientific and engineering applications.

Data: Consists of individual facts or bits of information.
CPU Speed: A typical personal computer CPU can execute hundreds of millions of instructions per second.
Memory Capacity: Memory can store billions of data items.

Keep your computer organized: This includes file management and folders structure for easy data retrieval.
Back up your system: Regular backups are essential for data recovery in case of system failure.
Run defrag and scandisk: These tools optimize your hard disk by reorganizing files and detecting errors.
Remove viruses and spyware: Keep your computer secure by using antivirus software and anti-spyware programs.
Clean the registry and software: Regular cleaning of the registry can enhance performance and fix errors.
Keep your operating system and software updated: Updates include security patches and bug fixes.
Clean your physical components: Wipe down your monitor, keyboard, and mouse to minimize dirt build-up.
Shut down properly: Always shut down your computer the correct way to avoid data loss.
Delete unwanted software: Uninstall programs you no longer use to free up space.