EXAMS AWS CERTIFIED DEVELOPER - ASOCIATE 5

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Can a user get a notification of each instance start / terminate configured with Auto Scaling?

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AutoScaling is configured with 3 AZs. Each zone has 5 instances running.

If AutoScaling wants to terminate an instance based on the policy action, which instance will it terminate first?

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A Developer has created an S3 bucket s3://mycoolapp and has enabled server across logging that points to the folder s3://mycoolapp/logs.

The Developer moved 100 KBof Cascading Style Sheets (CSS) documents to the folder s3://mycoolapp/css, and then stopped work.

When the developer came back a few days later, the bucket was 50 GB. What is the MOSTlikely cause of this situation?

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Regarding Amazon SNS, when you want to subscribe to a topic and receive notifications to your email, in the Protocol drop-down box, you should select

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An organization has launched two applicationsone for blogging and one for ECM on the same AWS Linux EC2 instance running in the AWS VPC.

The organization has attached two private IPs (primary and secondary) to the above mentioned instance.

The organization wants the instance OS to recognize the secondary IP address.

How can the organization configure this?

A Virtual Private Cloud (VPC) is a virtual network dedicated to the user's AWS account. It enables the user to launch AWS resources into a virtual network that the user has defined. With VPC the user can specify multiple private IP addresses for his instances. The number of network interfaces and private IP addresses that a user can specify for an instance depends on the instance type. This scenario helps when the user wants to host multiple websites on a single EC2 instance. After the user has assigned a secondary private IP address to his instance, he needs to configure the operating system on that instance to recognize the secondary private IP address. For AWS Linux, the ec2-net-utils package can take care of this step. It configures additional network interfaces that the user can attach while the instance is running, refreshes secondary IP addresses during DHCP lease renewal, and updates the related routing rules. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MultipleIP.html

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A user has created a blank EBS volume in the US-East-1 region.

The user is unable to attach the volume to a running instance in the same region.

What could be the possible reason for this?

An EBS volume provides persistent data storage. The user can attach a volume to any instance provided they are both in the same AZ. Even if they are in the same region but in a different AZ, it will not be able to attach the volume to that instance. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AmazonEBS.html

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You have been given a scope to deploy some AWS infrastructure for a large organisation.

The requirements are that you will have a lot of EC2 instances but may need to add more when the average utilization of your Amazon EC2 fleet is high and conversely remove them when CPU utilization is low.

Which AWS services would be best to use to accomplish this?

Auto Scaling enables you to follow the demand curve for your applications closely, reducing the need to manually provision Amazon EC2 capacity in advance. For example, you can set a condition to add new Amazon EC2 instances in increments to the Auto Scaling group when the average utilization of your Amazon EC2 fleet is high; and similarly, you can set a condition to remove instances in the same increments when CPU utilization is low. If you have predictable load changes, you can set a schedule through Auto Scaling to plan your scaling activities. You can use Amazon CloudWatch to send alarms to trigger scaling activities and Elastic Load Balancing to help distribute traffic to your instances within Auto Scaling groups. Auto Scaling enables you to run your Amazon EC2 fleet at optimal utilization. http://aws.amazon.com/autoscaling/

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A user has launched an EBS backed Linux instance.

How can a user detach the root device and attach it to another instance as a secondary volume?

If an Amazon EBS volume is the root device of an instance, it cannot be detached unless the instance is in the stopped state. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-detaching-volume.html

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