EXAMS AWS CERTIFIED DEVELOPER - ASOCIATE 31

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Which one of the following operations is NOT a DynamoDB operation?

In DynamoDB, DeleteItem deletes a single item in a table by primary key, but BatchDeleteItem doesn't exist. http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/operationlist.html

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You have been doing a lot of testing of your VPC Network by deliberately failing EC2 instances to test whether instances are failing over properly.

Your customer who will be paying the AWS bill for all this asks you if he being charged for all these instances.

You try to explain to him how the billing works on EC2 instances to the best of your knowledge.

What would be an appropriate response to give to the customer in regards to this?

Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance. Billing ends when the instance shuts down, which could occur through a web services command, by running "shutdown -h", or through instance failure. http://aws.amazon.com/ec2/faqs/#Billing

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A user has created an EBS instance in the US-East-1a AZ.

The user has a volume of 30 GB in the US-East-1b zone.

How can the user attach the volume to an instance?

If an EBS volume is not in the same AZ of an EC2 instance, it cannot be attached to the instance. The only option is to take a snapshot of the volume and create a new volume in the instance's AZ. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSSnapshots.html

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A user has launched an EC2 instance.

However, due to some reason the instance was terminated.

If the user wants to find out the reason for termination, where can he find the details?

An EC2 instance, once terminated, may be available in the AWS console for a while after termination. The user can find the details about the termination from the description tab under the label State transition reason. If the instance is still running, there will be no reason listed. If the user has explicitly stopped or terminated the instance, the reason will be "User initiated shutdown".

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In Amazon EC2, which of the following is the type of monitoring data for Amazon EBS volumes that is available automatically in 5-minute periods at no charge?

Basic is the type of monitoring data (for Amazon EBS volumes) which is available automatically in 5-minute periods at no charge called. http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/monitoring-volume-status.html

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A Developer is creating an Auto Scaling group whose instances need to publish a custom metric to Amazon CloudWatch.

Which method would be the MOSTsecure way to authenticate a CloudWatch PUT request?

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ADeveloper is creating an application that needs to locate the public IPv4 address of the Amazon EC2 instance on which it runs.

How can the application locate this information?

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Which one of the following data types does Amazon DynamoDBnot support?

Amazon DynamoDB supports the following data types: Scalar data types (like Number, String, and Binary) Multi-valued types (like String Set, Number Set, and Binary Set).

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