Computer science:Topic 4
- Created by: santhya_15
- Created on: 10-11-16 21:54
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- Computer Science: Topic 4
- The point of a CPU is to carry out processing on the computer and to fetch, decode and execute instructions
- 3.1MHz Cpu is the clock speed. It indicates how many instructions may be processed eveery second
- Quad- core CPU means that the computer has 4 cores which are independent processors within the CPU working at the same time
- RAM and ROM
- Programs and data which are currently in use are loaded in the RAM
- All the contents are lost when the power is turned off in RAM
- ROM is used to boot up the computer when it is switched on
- The purpose of RAM is that it stores parts of the operating system currently used b the computer. It stores programs that are currently running and stores data currently being used by the computer.
- Virtual memory is a section of the hard disk which is used to store items in RAM which are not being currently used
- Virtual memory is needed as its used to allow more programs/data to be loaded when RAM is insufficient
- A storage device is used to store data in a binary format for processing later
- An input device is used to enter data into the conmputer
- An output device is used to present information or the result of processing to the user.
- Cache memory is a small block of very high speed memory acting as a buffer between the CPU and the main memory - it stores data or instructions which are used frequently by the CPU
- The function of memory is that it is a temporary store for data or programs
- The point of a CPU is to carry out processing on the computer and to fetch, decode and execute instructions
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