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 is faster; asynchronous is more reliable

Answer

Synchronous uses Fibre Channel; asynchronous uses Ethernet

Answer

Synchronous replication is for files; asynchronous is for block storage

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 physical window in a data center used for cable management

Answer

The retention period for keeping backup copies

Answer

The network bandwidth allocated to backup traffic

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

A backup that cannot be read, only restored

Answer

A backup that is permanently stored and never deleted

Answer

A backup stored in an immutable object storage format

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 data center maintained at a specific temperature for equipment protection

Answer

A hot standby site where systems are always running

Answer

A cold site with only empty floor space and power

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

Full backup with VSS quiescing

Answer

Scheduled I/O pause during backup windows

Answer

Synchronous replication during snapshot creation

Question 6

What is 'changed block tracking' (CBT) and how does it benefit backup?

Accepted Answer

A hypervisor or storage mechanism that identifies which disk blocks have changed since the last backup, enabling faster incremental backups

Answer

A storage auditing feature that tracks who changed each data block

Answer

A network protocol that tracks packet changes in storage traffic

Answer

A RAID feature that tracks parity block updates