ICT Flashcards
Friday Friday
How do you check the validity of a bar code?
Check digit
A non-volatile internal memory used to store the start-up instructions
ROM or Read Only Memory
An internal component that provides the input and output of audio signals
Sound card
An internal component that is composed of the main memory, the control unit and the arithmatic logic unit
CPU
Compare the uses of a digital camera with a scanner
Similarities und differences
Similarities
* Both can capture images
* Both store digital data
Differences
* Digital camera is portable
* Scanner captures with more detail
Explain what is meant by extranet
- An extranet is part of a company’s intranet
- It requires credentials and the password to access it
What is the differences between Internet and Extranet
- Extranet is more secure
- There are more information on the internet
Health issues
Typing on a keybord for too long
Carpal syndrome
Health issues
Looking at a computer screen for a long time
Headache
Health issues
Sitting with a poor posture
Back ache
Problems that may occur if you change your passwords regularly
- More diffucult to find a different password (password could be weakened)
- User can easily forget the passwords (Can be locked out of the system)
- May have to write down passwords (Others can discover your passwords)
Stae what is meant by software
Programs that can be used to control the computer
Name the 2 types of software and what do dey mean
System software-Provide a platform for other softwares
Application software-Services that the user require to solve a task
Name 3 external hardware devices
Mouse
Keyboard
Monitor
Name 3 internal hardware devices
ROM
RAM
CPU
Input devices when u scan Barcodes
Barcode Scanner
Camera
t
Output devices when u scan barcodes
Monitor screens
Speakers
HDD
Has moving parts
Magnetic
Non-volatile storage
Can be External storage device
SSD
Have limited numer of read and write cycles
Uses flash memory
Main functions of a computer system
Software and hardware working together or smth
- Data Input
- Data Processing
- Data Storage
- Data Output
- Data Transmission
2 main components of CPU
- Arithmetic and logic unit
- Control Unit
Operations of the CPU
- Fetch instruction from the memory
- Decode into commands
- Execute commands
- Store results in memory
6 advantages and disadvantages from using a computer rather than a phone
Advantages
Larger screen
Easier to type
Have more features
Disadvantages
Less portable
Easy to carry
More likely to have a phone in hand
Compare intranet and extranet
Similarities and differences
Similarities
* Both have shared content
* Both ise internet technologies
* Both have restricted access
Differences
* Extranet can lead to more security breaches
* Intrenet shares data within an organisation whereas extranet shares content with external users and employees
* Extranet is a part of a company’s internet
