👉 A cache is a type of memory device used to store frequently accessed data. It works by first storing the most recent version of that data in RAM (Random Access Memory), and then when it needs to access this data again, it can read from the cache instead of accessing the hard drive or other storage devices. Caches are often used in computer systems to speed up operations like file reading or memory access. They work by using a technique called "cache-mem" where the most recent version of