Describeat least three applications where re-writeable optical laser diskwould be preferred over hard disks for storage

 Applications where re-writeable optical laser disk would be preferred over hard disks for storage are:

While storing the data in large amount, the optical disk are more preferred as, for storing the videos, photographs and various types of the images.This optical laser disk are used for transferring the information or data from one computer to another so we can easily modify or re-write the data at any time as, this disk are more convenient than hard disk.The optical laser disk are also helpful for distributing the software to the customers or users by using its large storing capacity features, as compared to hard disks.

 

The following are listed applications or requirements where the re-writable (optical) laser drive is preferred over storage hard drives.

Explanation:

A laser disk is often used to transmit data between one device to the next such that at any moment we could conveniently edit or re-write the details even though this drive is much more versatile than that of the disk.When processing the details in vast numbers, the optical disk is used to store certain photos, snapshots, and different file formats.As compared to hard disks, the optic disk has always been useful in delivering the applications to consumers or clients with its broad storage space functionality.

No the obviously don't ets say you search for cheese on google you will get one set of results and on yahoo another set. so no they can't be using the same web crawler.