Computer Storage Devices and Concepts

Hard disks have the highest data density among listed options, using magnetic storage with tracks and sectors that can store bits extremely close together. DVDs and CDs have lower density than modern hard disks. Floppy disks are obsolete with very low density. Tape drives have high capacity but lower density than hard disks.

Standard compact discs (CDs) have a storage capacity of 700 MB for data. The 1.44 MB option is for floppy disks, while 780 MB and 1024 MB are not standard CD capacities.

Seagate has been one of the largest manufacturers of hard disk drives for decades. While the market has consolidated with companies like Western Digital and Toshiba, Seagate remains a major player in storage technology, producing HDDs for computers, servers, and data centers.

When cutting and pasting, the item cut is temporarily stored in the clipboard.

Mouse is not a storage device.

Correct Answer: address

It can store 25 GB of data on a single side. The name Blu-ray Disk refers to the blue laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer wavelength red laser used for DVDs.

Cache memory is a high speed storage entity.

Data remains intact on secondary storage device and can be accessed even when the system is shut off.

Optical disks (CDs, DVDs) store data by burning microscopic pits onto a circular disk using laser technology. This is fundamentally different from magnetic storage (floppy disks, tapes) or punch cards. Option D correctly identifies optical disks as using this pit-burning method.

Option (3) is correct.

Option (2) is correct. 

 Option (4) is correct.

Option (1) is correct.

Option (1) is correct.