Rom = Memory hardware that allows fast access to permanently stored data but prevents addition to or modification of the data.

cache = A fast storage buffer in the central processing unit of a computer

Ram means randem access memory that will can done by only current using program information
the system will power off and then ram data's will deleted but
rom means read only memory that have stored application others and can't deletes this datas and cache meens ram part of one

Source: differ ram&rom

Rom = Memory hardware that allows fast access to permanently stored data but prevents addition to or modification of the data.

cache = A fast storage buffer in the central processing unit of a computer

Rom = Memory hardware that allows fast access to permanently stored data but prevents addition to or modification of the data.

cache = A fast storage buffer in the central processing unit of a computer

Cache Memory:
A small amount (normally less than 1MB) of high-speed memory residing on or close to the CPU. Cache memory supplies the processor with the most frequently requested data and instructions. Level 1 cache (primary cache) is the cache closest to the processor. Level 2 cache (secondary cache) is the cache second closest to the processor and is usually on the motherboard.
Ram-Random Access Memory
ROM : Read-only memory (ROM) is a class of storage medium used in computers and other electronic devices. Data stored in ROM cannot be modified,