Write-Back Cache

A Write-Back Cache is a type of memory system used to improve computer performance. When the processor needs to change data, it writes the new data into the cache (a small, fast storage area). Instead of updating the main memory immediately, it marks the cache data as "dirty." The main memory is only updated later, when the cache line is replaced or no longer needed. This approach reduces the number of times data has to be written to slow main memory, speeding up overall system performance and making data updates more efficient.