Write the difference between: a) RAM and hard disk
b) RAM and ROM
c) Volatile memory and non-volatile memory
d) DVD and floppy disk

RAM is used to store computer programs and data that CPU needs in real time. ... RAM data is volatile and is erased once computer is switched off. HDD,hard disk has permanent storage and it is used to store user specific data and operating system file

RAM is used to store computer programs and data that CPU needs in real time.  RAM data is volatile and is erased once computer is switched off.

Hard disk has permanent storage and it is used to store user specific data and operating system files

RAM =  Random access memory ;is volatile memory that temporarily stores the files you are working on

ROM = Read-only memory ;is non-volatile memory that permanently stores instructions for your computer

Similarities : They are present in the computer.

Volatile memory and non-volatile memory is RAM and ROM

(d.) Floppy disk is a magnetic storage medium with only a 1.44 M capacity, while a CD is an optical disc that can store 700M CDs are based on physical dimples on the disk surface.

Floppies cannot store much at all A CD will hold more than 450 floppies.

Explanation: