Flashcards
PC basics
Cards in this deck (18)
- 1What is an input device ???An input device is a device that is used to input information and text in to a computing system.
- 2what is an output device?An output device is used ton draw information from a computing system.
- 3what is the purpose of a power supplyThe type of power computers need is low-voltage DC.
- 4What is the purpose of the computer case?A computer system unit is the enclosure that contains the main components of a computer.
- 5What is the purpose of a storage device??The purpose of storage devices is to store data and software for later use.
- 6What is the purpose of the motherboard?It holds together many of the crucial components of a computer.
- 7What is the purpose of the RAM?RAM (Random Access Memory) is the hardware in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device's processor.
- 8what is the purpose of ROM ?????stores a program to boot up the computer this is called the bootstrap loader
- 9what is the purpose of a hard drive ???A hard disk drive (HDD), hard disk, hard drive or fixed disk is a data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.
- 10What is a repetitive strain injury (RSI) and what causes them?a condition in which the prolonged performance of repetitive actions, typically with the hands, causes pain or impairment of function in the tendons and muscles involved. is a gradual buildup of damage to muscles, tendons, and nerves from repetitive motions
- 11What is the cause of back injuries when using a computer?Usually due to poor posture or sitting in an awkward
position when using a computer. - 12What is eye strain and what is the cause?Usually caused by staring at a computer screen for a
long time. Particularly in poor light, in glare or with a
flickering screen. - 13By law, what do employers have to provide for their employees? (in regards to working with computers)tiltalble screens
anti-glare screen filters
adjustable chairs
foot supports
suitable lighting
workstations are not cramped
when working on a computer staff take frequent breaks
appropriate eye and eyesight tests by an optician - 14What is the purpose of Binary?a binary code presents text computer processor instructions or any other way using a two way system
- 15How many bits are in a Binary number?there are two bits 0 and 1
- 16device needed to use to connect to the internet??PC , network interface card , router , modem
- 17know how to convert denary to binary???Get a denary number and transfer it in to binary
- 18know how to convert binary to denaryget a set of binary and transfer it in to denary