Systems Architecture, Memory and Storage Flashcards
- Give three characteristics to consider when choosing a suitable type of secondary storage
1.Durability,Cost and Reliability
- a) How are Magnetic disks read?
b) what makes this form of media relatively slow?
c) what makes these vulnerable
- a)with a moving head inside the disk drive
b) the moving parts
c) magnetic fields
3.List 2 advantages of a Magnetic device
- they can be portable
they have a huge capacity which makes them suitable for desktop purposes
4.List 3 benefits of a solid state drive over a hard disk drive
4.The have faster access time than hdd’s
They have lower power consumption
they are more reliable
5.What is flash memory
5.Flash mempory is non volatile memory that can be read from and written to
6.Give 2 advantages of flash memory
- Flash memory is non-volatile, so the items on the camera will not be lost when the camera is turned off.
Flash memory can be read from and written to, which means new pictures/videos can be taken and they can be played back
7.Give 2 reasons why flash memory is a suitable storage type for an action camera
7.Flash memory is compact and lightweight
Flash memory is resistant to impacts, so it is unlikely to be damaged
8.How does optical storage work?
8.Lasers write data to the disk and read frrom it
what does the control unit do ? Give an example.
controls all the activities taking place in the CPU. It controls the execution of instructions in the correct sequence.
List the 3 operations that the ALU does
Logical Operations ,Shift Operations, Arithmetic Operations
What is the function of the MAR?
holds the address of the next item of data to be fetched or stored.
What is the function of the MDR?
holds data or a instruction temporarily when it is fetched or to be sent to memory
