32081031
Description
Flashcards by (∿°○°)∿ perola, updated more than 1 year ago
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Created by (∿°○°)∿ perola
almost 4 years ago
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| Question | Answer |
| Memory | Memory |
| The difference between RAM & ROM? | RAM, which stands for random access memory, and ROM, which stands for read-only memory, are both present in your computer. RAM is volatile memory that temporarily stores the files you are working on. ROM is non-volatile memory that permanently stores instructions for your computer. |
| The purpose of ROM in a computer system? | ROM is memory that cannot be changed by a program or user. ROM retains its memory even after the computer is turned off. For example, ROM stores the instructions for the computer to start up when it is turned on again. |
| The purpose of RAM in a computer system? | Computer memory or random access memory (RAM) is your system's short-term data storage; it stores the information your computer is actively using so that it can be accessed quickly. The more programs your system is running, the more memory you'll need. |
| The need of virtual memory? | Virtual memory has a very important role in the operating system. It allows us to run more applications on the system than we have enough physical memory to support. Virtual memory is simulated memory that is written to a file on the hard drive. ... If we run too many applications, at one point we will run out of RAM. |
| Flash memory | Flash memory is a long-life and non-volatile storage chip that is widely used in embedded systems. It can keep stored data and information even when the power is off. It can be electrically erased and reprogrammed. Flash memory was developed from EEPROM (electronically erasable programmable read-only memory). |
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Images (binary/octet-stream)
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Storage |
| The need for secondary storage? | Secondary storage is needed to keep programs and data long term. Secondary storage is non-volatile , long-term storage. Without secondary storage all programs and data would be lost the moment the computer is switched off. ... magnetic storage devices, such as hard disk drives. |
| Data capacity | The term data capacity refers to the amount of data (information) that can be stored in a tag |
| calculation of data capacity requirements | Calculating the number of documents that can be stored on a storage medium can be a straightforward process. |
| common types of storage | magnetic storage devices, such as hard disk drives. optical storage devices, such as CD, DVD and Blu-ray discs. solid state storage devices, such as solid state drives and USB memory sticks. |
| suitable storage devices and storage media for given application, and the advantages and disadvantages of these. | advantages |
| Magnetic storage , Relatively cheap per unit of storage. Fast access and retrieval times compared to other storage devices. Optical storage , it can store movies with better picture and sound quality. some are portable. Solid State Storage Devices , Very compact in size and therefore very portable. High speed of data transfer and low power consumption. | disadvantages |
| Magnetic storage , Can be easily damaged, will slow down and eventually break over time. Slower access than Solid State Drives. Optical storage , can lose data when scratched. Solid State Storage Devices , Considerably more expensive per unit than magnetic storage. More vulnerable to abrupt power loss and electro-magnetic fields. | thats all ?₍ᐢ. ̫ .⑅ᐢ₎? |
| Please go to P2 of this flashcard | https://www.goconqr.com/en-GB/flashcard/32184128/Year-9-Computer-Science-Revision-List-P2 or go to my profile ٩◔̯◔۶. |
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