Primary memory temporarily stores data whereas secondary memory stores data permanently.The memory of the computer is divided into two categories: Primary Memory and Secondary Memory.Which secondary memory device is smaller, faster, high storage capacity and are more durable and reliable.Can data be retained after the computer has been shut off from?.In which ROM, data can be erased and modified as many times a user desire?.In which ROM, Once the data, has been written cannot be modified?.Examples with respect to class 6 computer lessons: They are smaller, faster, high storage capacity and are more durable and reliable. Pen drive is a portable memory device in which data can be stored permanently and erased when not needed. DVDs also come in three varieties – read only, recordable and rewritable. They are widely used for storing and viewing movies and other data. With respect to class 6 Memory and Storage Device, Digital Video Disk (DVD or DVD-ROM) is a disk capable of storing large amounts of data. CD-RW: Data written in CD-RW can be erased.CD-R: Data in CD-R can be written once and but read many times.Compact disks come in various types depending upon the application. With respect to class 6 Memory and Storage Device, a compact disk is used to read and write data.
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