DEA-1TT5 Backup, Recovery, and Business Continuity 3

Question 1

What is the difference between 'synchronous' and 'asynchronous' replication?

Accepted Answer

Synchronous replication confirms writes on both primary and secondary before acknowledging the host, ensuring zero data loss; asynchronous replicates after acknowledging the host, tolerating some data loss

Answer

Synchronous replication holds the host write acknowledgment until both sites confirm the write, guaranteeing zero data loss but adding latency; asynchronous replication acknowledges immediately and replicates in the background, introducing potential data loss but no latency penalty.

Question 2

What is a 'backup window' and why does it matter?

Accepted Answer

The scheduled time period available to complete backup operations without impacting production performance

Answer

The backup window is the time frame (often overnight) allocated for backup jobs to run; as data volumes grow, backups that exceed the window impact production hours.

Question 3

What does 'immutable backup' mean and why is it important for ransomware protection?

Accepted Answer

A backup that cannot be modified, deleted, or encrypted after creation, ensuring a clean recovery point exists even if ransomware attacks the backup infrastructure

Answer

Immutable backups use WORM (Write Once Read Many) storage or object lock features to prevent any modification or deletion for a defined retention period, ensuring ransomware cannot corrupt the backup copy.

Question 4

In disaster recovery, what is a 'warm site'?

Accepted Answer

A secondary site with infrastructure partially provisioned and ready, requiring some setup time before it can resume operations

Answer

A warm site has hardware and connectivity pre-deployed but may not have current data loaded — it requires hours to days of setup to become operational, balancing cost against recovery speed.

Question 5

What technology allows applications to access their storage even during a snapshot creation with no I/O interruption?

Accepted Answer

Copy-on-Write (COW) snapshots that redirect writes to new locations while preserving the original snapshot data

Answer

Copy-on-Write (COW) snapshots preserve the original data blocks by redirecting any new writes to new locations, allowing applications to continue writing while the snapshot captures the original state.

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 3