A Solutions Architect is working with a company that operates a standard three-tier web application in AWS. The web and application tiers run on Amazon EC2 and the database tier runs on Amazon RDS. The company is redesigning the web and application tiers to use Amazon API Gateway and AWS Lambda, and the company intends to deploy the new application within 6 months. The IT Manager has asked the Solutions Architect to reduce costs in the interim.
Which solution will be MOST cost effective while maintaining reliability?

A. Use Spot Instances for the web tier, On-Demand Instances for the application tier, and Reserved Instances for the database tier.
B. Use On-Demand Instances for the web and application tiers, and Reserved Instances for the database tier.
C. Use Spot Instances for the web and application tiers, and Reserved Instances for the database tier.
D. Use Reserved Instances for the web, application, and database tiers.

A company runs a legacy system on a single m4.2xlarge Amazon EC2 instance with Amazon EBS 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 data. 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. 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.
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. 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.

In Amazon CloudWatch, you can publish your own metrics with the put-metric-data command. When you create a new metric using the put-metric-data command, it can take up to two minutes before you can retrieve statistics on the new metric using the get-metric-statistics command.
How long does it take before the new metric appears in the list of metrics retrieved using the list- metrics command?

A. After 2 minutes
B. Up to 15 minutes
C. More than an hour
D. Within a minute

After your Lambda function has been running for some time, you need to look at some metrics to ascertain how your function is performing and decide to use the AWS CLI to do this.
Which of the following commands must be used to access these metrics using the AWS CLI?

A. mon-list-metrics and mon-get-stats
B. list-metrics and get-metric-statistics
C. ListMetrics and GetMetricStatistics
D. list-metrics and mon-get-stats

Which of the following is not included in the metrics sent from Billing to Amazon CloudWatch?

A. Recurring fees for AWS products and services
B. Total AWS charges
C. One-time charges and refunds
D. Usage charges for AWS products and services

A user has configured an EC2 instance in the US-East-1a zone. The user has enabled detailed monitoring of the instance. The user is trying to get the data from CloudWatch using a CLI.
Which of the below mentioned CloudWatch endpoint URLs should the user use?

A. monitoring.us-east-1a.amazonaws.com
B. cloudwatch.us-east-1a.amazonaws.com
C. monitoring.us-east-1.amazonaws.com
D. monitoring.us-east-1-a.amazonaws.com

An AWS account owner has setup multiple IAM users. One of these IAM users, named John, has CloudWatch access, but no access to EC2 services. John has setup an alarm action which stops EC2 instances when their CPU utilization is below the threshold limit.
When an EC2 instance's CPU Utilization rate drops below the threshold John has set, what will happen and why?

A. CloudWatch will stop the instance when the action is executed
B. Nothing will happen. John cannot set an alarm on EC2 since he does not have the permission.
C. Nothing will happen. John can setup the action, but it will not be executed because he does not have EC2 access through IAM policies.
D. Nothing will happen because it is not possible to stop the instance using the CloudWatch alarm

A user has enabled detailed CloudWatch monitoring with the AWS Simple Notification Service. Which of the below mentioned statements helps the user understand detailed monitoring better?

A. SNS cannot provide data every minute
B. SNS will send data every minute after configuration
C. There is no need to enable since SNS provides data every minute
D. AWS CloudWatch does not support monitoring for SNS

How many metrics are supported by CloudWatch for Auto Scaling?

A. 7 metrics and 5 dimension
B. 5 metrics and 1 dimension
C. 1 metric and 5 dimensions
D. 8 metrics and 1 dimension

You set up your first Lambda function and want to set up some Cloudwatch metrics to monitor your function. Which of the following Lambda metrics can Cloudwatch monitor?

A. Total requests only
B. Status Check Failed, total requests, and error rates
C. Total requests and CPU utilization
D. Total invocations, errors, duration, and throttles