Random Access Memory (RAM) ____ is a type of very fast ____ that is used to ____ hold data about currently running programs. When you ____ any file from the hard drive there is a lag between the request and the data being sent, this would cause massive slow down of the ____ if data was constantly being requested from the hard drive. Instead a single ____ is sent to the hard ____ when the program loads and the ____ program is loaded in to RAM. The RAM is ____ memory and all the data is stored in circuits using ____ currents and transistors. This means that there is very little latency and there the computer loads the program much ____ than if it wasn’t used. However because RAM data is stored ____, RAM is ____ – once power is lost all data is lost as well. When a personal ____ is in use the following are ____ into RAM from the backing ____: The Operating System (OS), All the ____ programs that are running AND Any data files that are in ____. ____ memory is small ____ of RAM located on the CPU itself. It ____ commonly used data that is being ____ used by the operating system, allowing for even faster access than the RAM. It acts like a ____ (a temporary store) between the CPU and RAM. Rather than access instructions ____ data from ____ one at a time, whole blocks of instructions and ____ that are in use by the CPU are ____ into the cache memory, along with the associated memory addresses. If the ____ needs to access a memory ____ it first checks the cache ____ to see if there is a match. If ____ is then it access the ____ of the cache version rather than the ____ stored in RAM. When a block of data or ____ in cache memory is no longer ____ used by the CPU it is either deleted, or copied ____ to RAM if any changes have been made. What are the ____ between ROM and RAM? RAM ____ Access Memory) ____ ROM (Read Only Memory) are ____ types of solid-state memory, allowing ____ access to data and not being ____ to being moved around while in use. In both ____ of memory, ____ electronic switches are arranged in ____ (usually of 8, making 1 byte of memory) and ____ numbers are stored as a pattern of switch positions. The differences ____ Random Access Memory (RAM) and Read-Only Memory (ROM) are ____ below: The contents of RAM can be ____ so a computer can both ____ from and write to memory addresses in RAM. RAM is described as ____ meaning that if the power is switched off or the battery removed then the contents will be lost. The contents of ROM cannot be altered so a ____ can only read from ____ addresses in ROM. ROM is described as ____ meaning that if the power is switched off or the battery ____ then the contents are ____ lost.

RAM, ROM and Cache

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