LCA Backup & Disaster Recovery 3

Question 1

Which dd command correctly creates a raw disk image of /dev/sda to a file called disk.img?

Accepted Answer

dd if=/dev/sda of=disk.img

Answer

dd reads from 'if' (input file) and writes to 'of' (output file); if=/dev/sda of=disk.img creates a byte-for-byte image of the disk.

Question 2

What does RTO stand for in disaster recovery planning?

Accepted Answer

Recovery Time Objective

Answer

RTO (Recovery Time Objective) is the maximum acceptable time to restore a system or service after a disaster.

Question 3

What does RPO stand for in disaster recovery planning?

Accepted Answer

Recovery Point Objective

Answer

RPO (Recovery Point Objective) defines the maximum acceptable amount of data loss measured in time — how old the most recent backup can be.

Question 4

Which Bacula daemon runs on the backup client and is responsible for reading/writing data on the client system?

Accepted Answer

bacula-fd (File Daemon)

Answer

The Bacula File Daemon (bacula-fd) runs on each client and handles local file I/O during backup and restore operations.

Question 5

A sysadmin wants to verify a backup tape is readable without fully restoring it. Which tar option lists archive contents without extraction?

Accepted Answer

-t

Answer

tar -t (--list) reads the archive and displays its contents without extracting any files, useful for verifying tape readability.

(LCA) Certified Linux Administrator Practice Test