Primary & Secondary storage Flashcards

OCR GCSE J277 Computer Science specification

RAM

Random Access Memory, volatile memory used for temporary data storage while programs are running.

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Terms in this set (27)

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RAM

Random Access Memory, volatile memory used for temporary data storage while programs are running.

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ROM

Read-Only Memory, non-volatile memory used to store the computer's start-up instructions.

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Primary storage

Fast, volatile memory used to store data and instructions currently in use by the CPU.

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Virtual memory

A section of secondary storage used as temporary RAM when physical RAM is full.

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Optical storage

Uses lasers to read/write data on discs like CDs, DVDs, and Blu-rays.

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Magnetic storage

Uses magnetic fields to store data on devices like hard drives and tapes.

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Solid state storage

Uses flash memory to store data, offering fast access speeds and durability.

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RAM characteristics

Volatile, fast, and used for temporary storage of active processes.

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ROM characteristics

Non-volatile, cannot be changed, and stores essential start-up instructions.

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Virtual memory purpose

Allows the system to handle more processes than physical RAM can support when full

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Optical storage advantages

Portable, cheap, and widely compatible.

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Optical storage disadvantages

Limited capacity, slower access speeds, and less durable.

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Magnetic storage advantages

High capacity and relatively low cost per GB.

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Magnetic storage disadvantages

Less durable and slower compared to solid state storage.

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Solid state storage advantages

Fast access speeds, durable, and portable.

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Solid state storage disadvantages

Higher cost per GB compared to magnetic storage.

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RAM vs ROM

RAM is volatile and temporary; ROM is non-volatile and permanent.

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Primary storage vs secondary storage

Primary storage is fast and volatile; secondary storage is slower and non-volatile.

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Virtual memory drawbacks

Slower than physical RAM and can cause system performance issues.

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Optical storage examples

CDs, DVDs, Blu-ray discs.

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Magnetic storage examples

Hard disk drives (HDDs), magnetic tapes.

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Solid state storage examples

Solid state drives (SSDs), USB flash drives.

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Primary storage need

Essential for storing data and instructions actively used by the CPU.

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Secondary storage need

Used for long-term storage of data and programs.

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RAM in embedded systems

Stores temporary data for the device's operations.

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ROM in embedded systems

Stores the firmware or software needed to operate the device.

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Cache memory

A small, fast type of primary storage located close to the CPU.

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