1.1.3 Input, output and storage - Ben Flashcards
What does the laser laser light scan on an optical disc to measure for 0s and 1s?
Pits (0s) and Lands (1s)
How does a magnetic disc store data?
By using two magnetic states, polarised (1s) and unpolarised (0s).
How does a flash drive store information?
A flash drive stores information using flash memory, where data is saved in blocks of memory cells that retain electrical charges even without power.
What is virtual storage?
Virtual storage refers to the use of disk space as an extension of a system’s memory, providing an illusion of more available memory than physically exists.
What would be the recommended storage for a drone
Flash storage (SSD)
What is an output device?
An output device is hardware that receives and displays or produces data from a computer, such as a monitor, printer, or speakers
What is an input device
Any peripheral device that can accept data, presented in the appropriate machine readable form, decode it and transmit it as electrical pulses to the CPU
What is virtual memory
Uses a section of the hard drive to act as RAM when the space in main memory is insufficient to store programs being used.
What is RAM
RAM is your computer or laptop’s short-term memory. It’s where the data is stored that your computer processor needs to run your applications and open your files
What is ROM
ROM is non-volatile, permanent data that, normally, can only be read, not written to. ROM contains the programming that allows a computer to start up or regenerate each time it is turned on
Optical storage advantages
Cheap light weight and portable Resilient
Optical storage advantages
Cheap light weight and portable Resilient
Disadvantages of optical
Can be scratched
Low capacity
Advantages of flash
No moving parts
high storage
small size
disadvantages of flash
expensive
