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 (Recovery Point Objective) specifies the maximum age of data that must be recovered (how much data loss is acceptable), while RTO (Recovery Time Objective) specifies how quickly systems must be restored.

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 full backup creates a complete copy of all selected data, serving as the baseline from which incremental or differential backups reference.

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 backups are smaller and faster since they only capture changes since the last backup, but restores require the last full plus all incrementals; differentials are larger but need only the last full plus latest differential to restore.

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

The 3-2-1 rule recommends maintaining 3 total copies of data (1 primary + 2 backups), on 2 different media types, with at least 1 copy stored at an offsite location.

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 captures a volume's state at a point in time using space-efficient pointer or copy-on-write mechanisms on the same storage system, while a backup is an independent copy on separate media.

DEA-1TT5 - Information Storage and Management Exam Practice Test

DEA-1TT5 - Information Storage and Management Exam Practice Test

DEA-1TT5 Backup, Recovery, and Business Continuity