Question $17$

$"$An online stock trading application is deployed to multiple Availability Zones in us$-$east$-2$ region $($Ohio$).$ Considering the massive financial transactions that the application handles, the company has hired you to be a consultant to make sure tha the system is scalable, highly available and disaster resilient. In the event of failure, the Recovery Time Objective $($RTO$)$ must be less than $3$ hours and the Recovery Point Objective $($RPO$)$ must be $10$ minutes to meet the compliance requirements. In this scenario, which Disaster Recovery strategy can be used to achieve the RTO and RPO requirements in the event of system failure?

Take hourly database backups to an $53$ bucket with transaction logs stored in an $53$ every $10$ minutes. Set$-$up Cross$-$Region Replication to another

Configure the database to use synchronous master$-$slave replication between multiple AZs.

Take $10-$minute database backups to Glacier with transaction logs stored in an S$3$ every $5$ minutes:

Take $15-$minute database backups to EC$2$ instance with transaction logs stored in an $53$ every $10$ minutes.