Page 10 - Trackpad_ipro 4.1_Class4
P. 10

The primary memory is further divided into two types:

                  1.  Random Access Memory (RAM)
                  2.  Read-Only Memory (ROM)

                  Random Access Memory (RAM)

                  RAM is a  temporary  memory. The information
                  stored  in  this memory  is lost when  the  computer

                  is turned  off.  That’s why  it is also called  volatile
                  memory. It temporarily stores data and instructions
                  provided by the user, as well as the results generated
                                                                                                          RAM
                  by the computer.
                  Types of RAM:

                  1.  Dynamic RAM (DRAM): It requires continuous power to regularly refresh the

                     data stored.
                  2.  Static RAM (SRAM): It also requires constant power to hold on to data, but it
                      doesn’t need to be continually refreshed the way DRAM does.

                     However, SRAM is significantly faster and uses less power than DRAM.
                  Read-Only Memory (ROM)


                  Information stored in ROM is permanent in nature, i.e., it
                  holds the data even when you turn off the system. It holds
                  the instructions required to start a computer. It is also called
                  non-volatile memory.                                                            ROM

                  Secondary Memory


                  This type of memory is permanent in nature and is not directly accessed by the
                  CPU. It allows users to store data that can be easily retrieved. It is also cheaper
                  compared to primary memory.

                  Secondary memory devices are also called secondary storage devices. They are
                  categorised into three types:


                                          Secondary Storage Devices




                     Magnetic Disk                 Optical Disc                Flash Memory




                                                           Blu-ray                      Memory          Solid State
                       Hard Disk         CD       DVD                   Pen Drive
                                                             Disc                         Card             Drive



                    8      iPro (Ver. 4.1)-IV
   5   6   7   8   9   10   11   12   13   14   15