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NEW QUESTION 27
A company runs a legacy system on a single m4.2xlarge Amazon EC2 instance with Amazon EBS2 storage. The EC2 instance runs both the web server and a self-managed Oracle database. A snapshot is made of the EBS volume every 12 hours, and an AMI was created from the fully configured EC2 instance.
A recent event that terminated the EC2 instance led to several hours of downtime. The application was successfully launched from the AMI, but the age of the EBS snapshot and the repair of the database resulted in the loss of 8 hours of dat a. The system was also down for 4 hours while the Systems Operators manually performed these processes.
What architectural changes will minimize downtime and reduce the chance of lost data?
- A. Create an Amazon CloudWatch alarm to automatically recover the instance. Create a script that will check and repair the database upon reboot. Subscribe the Operations team to the Amazon SNS message generated by the CloudWatch alarm.
- B. Increase the web server instance count to two m4.xlarge instances and use Amazon Route 53 round-robin load balancing to spread the load. Enable Route 53 health checks on the web servers. Migrate the database to an Amazon RDS Oracle Multi-AZ DB instance.
- C. Run the application on m4.2xlarge EC2 instances behind an Elastic Load Balancer/Application Load Balancer. Run the EC2 instances in an Auto Scaling group across multiple Availability Zones with a minimum instance count of one. Migrate the database to an Amazon RDS Oracle Multi-AZ DB instance.
- D. Run the application on m4.xlarge EC2 instances behind an Elastic Load Balancer/Application Load Balancer. Run the EC2 instances in an Auto Scaling group across multiple Availability Zones with a minimum instance count of two. Migrate the database to an Amazon RDS Oracle Multi-AZ DB instance.
Answer: D
Explanation:
Ensures that there are at least two EC instances, each of which is in a different AZ. It also ensures that the database spans multiple AZs. Hence this meets all the criteria.
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.html
NEW QUESTION 28
An ecommerce website running on AWS uses an Amazon RDS for MySQL DB instance with General Purpose SSD storage. The developers chose an appropriate instance type based on demand, and configured 100 GB of storage with a sufficient amount of free space.
The website was running smoothly for a few weeks until a marketing campaign launched On the second day of the campaign, users reported long wait times and time outs Amazon CloudWatch metrics indicated that both reads and writes to the DB instance were experiencing long response times. The CloudWatch metrics show 40% to 50% CPU and memory utilization, and sufficient free storage space is still available The application server logs show no evidence of database connectivity issues What could be the root cause of the issue with the marketing campaign?
- A. It exhausted the maximum number of allowed connections to the database instance
- B. It exhausted the network bandwidth available to the RDS for MySQL DB instance
- C. It caused the data in the tables to change frequently, requiring indexes to be rebuilt to optimize queries
- D. It exhausted the I/O credit balance due to provisioning low disk storage during the setup phase
Answer: D
NEW QUESTION 29
Can a Direct Connect link be connected directly to the Internet?
- A. Yes
- B. No
- C. Yes, this can be done only for certain regions.
- D. Yes, this can be done if you pay for it.
Answer: B
Explanation:
AWS Direct Connect is a network service that provides an alternative to using the Internet to utilize AWS
cloud service. Hence, a Direct Connect link cannot be connected to the Internet directly.
Reference: http://aws.amazon.com/directconnect/faqs/
NEW QUESTION 30
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