Use of Buffers (Cambridge (CIE) A Level Computer Science): Revision Note
Exam code: 9618
Buffers
What is a buffer?
A buffer is a temporary storage area that holds data while it is being transferred between two devices or processes
Buffers help manage speed differences between components, ensuring smooth data flow
How buffers work
Data is collected in the buffer before being processed or output
When the receiving device is ready, it takes data from the buffer
This prevents data loss and allows devices with different speeds to communicate effectively
Examples
Buffer | Description |
|---|---|
Keyboard | Stores keystrokes until the processor is ready to handle them |
Holds print jobs so the processor can move on while the printer outputs the data at its own speed | |
Video | Stores a portion of data before playback to prevent pauses caused by network delays |
Examiner Tips and Tricks
Key points
Buffers are used to synchronise data transfer between fast and slow devices
They improve efficiency and avoid bottlenecks
Without buffers, data could be lost or delayed if one device is not ready to process information
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