DEA-1TT5 Backup, Recovery, and Business Continuity

Question 1

What is the difference between RPO and RTO in disaster recovery planning?

Accepted Answer

RPO defines maximum acceptable data loss measured in time; RTO defines maximum acceptable downtime before recovery must complete

Answer

RPO is the recovery time objective, RTO is the recovery point objective

Answer

RPO and RTO both measure downtime but in different units

Answer

RPO applies to databases while RTO applies to file systems

Question 2

What is a 'full backup'?

Accepted Answer

A backup that copies all selected data regardless of when it was last backed up

Answer

A backup that only captures files changed since the last backup

Answer

A backup of only system files and configurations

Answer

A backup that stores data in uncompressed format

Question 3

What is the key difference between an incremental backup and a differential backup?

Accepted Answer

Incremental backs up data changed since the last backup of any type; differential backs up all data changed since the last full backup

Answer

Incremental is faster to restore; differential is faster to back up

Answer

Incremental backs up files; differential backs up databases

Answer

Incremental uses tape; differential uses disk

Question 4

What does the '3-2-1 backup rule' recommend?

Accepted Answer

3 copies of data, on 2 different media types, with 1 copy stored offsite

Answer

3 full backups, 2 differentials, and 1 incremental per week

Answer

3-hour, 2-hour, and 1-hour recovery time objectives for different data tiers

Answer

Back up 3 times per day, keep 2 weeks of history, 1 year of monthly backups

Question 5

What is a 'snapshot' in storage, and how does it differ from a backup?

Accepted Answer

A snapshot is a point-in-time copy of a volume stored on the same system, while a backup is a separate copy stored independently

Answer

A snapshot and a backup are identical technologies with different names

Answer

A snapshot is slower to create but safer than a backup

Answer

A snapshot stores only metadata while a backup stores full data

Question 6

What is 'deduplication' in the context of backup storage?

Accepted Answer

A technique that identifies and eliminates redundant data segments to reduce backup storage consumption

Answer

Removing duplicate backup jobs from the schedule

Answer

Running two identical backup jobs to verify data integrity

Answer

Backing up only files with duplicate names