Backup and compression practices – UGC NET Question

Statements A, B and C correctly outline prudent backup and compression practices, while D contradicts basic safety principles. Backups should be redundant and ideally off-device, with cloud services offering off-site resilience. Compression is a common method to save storage space or bandwidth but does not replace the need for multiple copies. Relying on a single device creates a single point of failure, so D is not acceptable. Therefore, the correct combination is A, B and C only.

Option A:
Option A is incomplete because it includes A and B but omits C. Although backups are central, understanding compression as a complementary strategy for efficient storage and transfer is also important.

Option B:
Option B is incomplete because it lists B and C only and leaves out A. Statement A emphasises the broader rationale for backup practices and should not be excluded when discussing data protection.

Option C:
Option C is correct because it brings together all the true statements about backups and compression and excludes the unsafe recommendation in D. It reflects the need for multiple copies and thoughtful storage management in ICT use.

Option D:
Option D is incorrect because it mixes A and C with D and treats D as correct. Suggesting that a single copy on one device is a good backup strategy exposes data to high risk of loss, so this option cannot be correct.