Flashcards
Computer Science: Unit 4: Memory and Storage
Cards in this deck (19)
- 1What are the 3 main types of Primary Storage?Registers
Main Memory (RAM) Random Access Memory
ROM Read only Memory - 2What are registers?Small active memory areas that can hold one item of data at a time. Content changes with each fetch-execute cycle
- 3RAM 3Stored using electronic charges.
Volatile memory
Stored in running programs, operating system, data currently being used.
Access fast - 4ROM 3Fixed memory. Doesn't use electricity.
Non-volatile
Stored in bootstrap - computing bootup instructions.
Can't take on new content - 5Primary StorageActive electronic memory inside the CPU
- 6Volatile memoryContent of which is lost when the computer is turned off.
- 7Are they volatile, non-volatile or both? Primary Storage Secondary Storage Offline Storage Give examples of eachPrimary - volatile and non-volatile ROM RAM
Secondary - non-volatile ie SSD HDD
Offline storage - non-volatile ie CD, DVD, USB, HDD, flash drive - 8Secondary StorageMemory that is not directly accesses by the CPU
- 9Off-line StorageAny device that can hold data that is not permanently connected to the computer
- 10HDD and give adv and disHard Disk Drive - non-volatile storage that uses magnetic storage technology.
Slower than SSD, large
Cheaper per unit data - 11SSD and give adv and disSolid State Drive - non-volatile-uses flash technolgoy - traps electrons
Adv Fast, portable, light weight, stores lots of data
Dis - less reliable in long term, more expensive than magnetic - 12Magnetic StorageConverts data into magnetism. Mechanical parts move over disks surface to read and write data magnetically
- 13Advantages 3 and Disadvantages 3 of Magnetic Storageadv - Cheap, vast storage capacity, fast write speed
Dis - lost of mechanical parts, durability issue, not very portable - 14Optical StorageRead by a light beam. A disk is covered by a thin reflective layer. Lazer hits a pit or mark, reflection is less bright - difference given in 1s and 0s - digital data
- 15Advantages 3 and Disadvantages 3 of Optical StorageAdv - cheap, easily portable, little space taken up
Dis - less storage compared to others, easily damaged, slow write speeds
ie CD, DVD, Blu-Ray - 16What to consider when choosing storage 5Capacity
Reliability and durability
Portability
Cost
Speed of access - hard drives wired are fastest - 17Cloud Storagedata sent along Internet connection to be stored
- 18Advantages of Cloud Storage 3Access data from any device with internet access
Internet company backs up data - no risk of being lost
doesn't take up any storage on won device - 19Disadvantage of Cloud Storage 2Some concerns of privacy
Cannot access without Internet
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- Computer Science GCSE (Unit 4) Flashcards on Computer Science: Unit 4: Memory and Storage, created by HRYN red on 21/01/2021.
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- HRYN red
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