Data and Information - Assistive Technologies, Bluetooth and New Technology Flashcards
1
Q
What is data?
A
- Words, numbers, dates, images etc without meaning or context
- Raw facts and figures
2
Q
What is information?
A
- Data which is given context
- Data with a meaning
- Data which has been processed by the computer
3
Q
How is information turned into knowledge?
A
- It can be understood and learnt from, rules are applied to learn.
- Conclusions are drawn and judgements, opinions, predictions and decisions can be made.
4
Q
What is validation?
A
- Checks data to make it as accurate as possible.
* Uses computer softwares to check what’s entered is reasonable.
5
Q
What are the validation checks?
A
- Type check - checks something of the correct type is entered (number in a number field)
- Range check - checks something is within a specific range (>18yrs)
- Presence check - checks that something is there (mandatory field)
- Format check - checks what is enter is of the correct structure (date: DD/MM/YYYY)
- Length check - ensure that information is of a specific length (field has to be between 3-16 characters)
6
Q
What is verification?
A
•Means to check the data that you’ve entered against the original source of data
7
Q
What are the types of verification?
A
- Entering data twice (double keying)
- Double checking
- Verifying you’re human to prevent BOTS or automated sign-ups by using CAPTCHA
8
Q
What are the internet connections?
A
- Broadband (DSL)
- Satellite
- Mobile Communication
- Dial-up
- Cable
9
Q
What’s the download speed?
A
- When you download and upload you have a connection speed which is often referred to as your download speed which is measure in MBPS (Megabits per second)
- The more MBPS you more you can download in any one second, dependant on your bandwidth.
10
Q
What’s bandwidth?
A
•The amount of data you can download depends on your bandwidth. The more (wider) your bandwidth you have the more you can download at any one time.
11
Q
What are the advantages of broadband?
A
- 10-100 times faster than traditional dial-up connection
- High bandwidth connection
- Make phone calls at the same time
- Always-on connection (convenient)
12
Q
What are the disadvantages of broadband?
A
- Speedier broadband connections cost almost twice as much as a dial-up connection
- Security concerns arise when the computer is 24/7. There may be a possibility that someone wants to access the computer when it’s on
- The broadband connection increases the speed capability of the Internet, but doesn’t guarantee the speed. The internet speed is very much depends on the IPS’s server
13
Q
What are the advantages of cable?
A
- Similar technology as broadband
- Capable of slightly faster speeds (in theory)
- Doesn’t require phone service to operate
14
Q
What are the disadvantages of cable?
A
- Connection speeds received often depends on how many people in the area are connected to the Internet at once
- May require substantial connection fees
- Unavailable in some places
- Upload speeds can be a lot slower than download speed
15
Q
What are the advantages of dial-up?
A
- Available to anyone with a computer, phone and modem
- May be the only available choice for rural/remote areas where broadband connection is unavailable
- Low-cost - charges per minute
- Perfect for rare use
