Year 11 Information Processes & Technology

List four types of hardware used to collect data
An Analog to Digital Converter (ADC) is a device that organises sound waves into a digital representation – how does it do this?
save coordinates of analog wave as a digital value
What would be the most appropriate file format to organise image data for presentation of the data on the internet?
looking for recommendation of jpeg over gif or bmp file
What software tools could you use to combine audio, image and text format data?
Microsoft Frontpage/Dreamweaver/Movie Maker

What is the difference between data and information? Give an Example
data numbers and text. Information meaningful to humans.
Why would it be good to have large amounts of primary and secondary storage and fast processors when analysing data?
can perform complex computations, sorting, grouping, selection of data quickly. Secondary storage, place for data to be kept.

Analysing data using non-computer tools like manually searching a phone book can take much longer than using computer tools.
WORK ON THIS WORDING MORE

How is data physically stored on a CD-ROM?
laser creates pits in surface of reflective metal on the disc

The CPU in processing data uses the Fetch-Execute cycle? What are the four steps in this Fetch-Execute cycle?
Fetch – Decode – Execute – Store

What is the difference between volatile and non-volatile data?
volatile data is stored in primary memory (CPU) and is lost when the computer is turned off. Non-volatile data is stored in secondary memory

What features can you use in Excel to secure data?
Worksheet protection, passwords, cell locking

Draw lines and arrows to show the differences between simplex, half duplex and full duplex transmission?

An RS232 converts serial transmission to what other kind of transmission?
Parallel transmission