EXAMS AWS CERTIFIED DEVELOPER - ASOCIATE 16

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Games-R-Us is launching a new game app for mobile devices.

Users will log into the game using their existing Facebook account and the game will record player data and scoring information directly to a DynamoDB table.

What is the most secure approach for signing requests to the DynamoDB API?

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You attempt to store an object in the US-STANDARDregion in Amazon S3, and receive a confirmation that it has been successfully stored.

You then immediately make another APIcall and attempt to read this object.

S3 tells you that the object does not exist What could explain this behavior?

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An organization has created multiple components of a single application for compartmentalization.

Currently all the components are hosted on a single EC2 instance.

Due to security reasons the organization wants to implement two separate SSLs for the separate modules although it is already using VPC.

How can the organization achieve this with a single instance?

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. With each network interface the organization can assign an EIP. This scenario helps when the user wants to host multiple websites on a single EC2 instance by using multiple SSL certificates on a single server and associating each certificate with a specific EIP address. It also helps in scenarios for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MultipleIP.html

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An ELB is diverting traffic across 5 instances.

One of the instances was unhealthy only for 20 minutes.

What will happen after 20 minutes when the instance becomes healthy?

AWS Elastic Load Balancing continuously checks the health of an instance. If one of the instances is unhealthy it stops sending traffic to it and automatically reroutes the traffic to the remaining running EC2 instances. If the failed EC2 instance is restored, Elastic Load Balancing will again start sending traffic to that instance. http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/SvcIntro.html

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Your manager has requested you to tag EC2 instances to organize and manage a load balancer.

Which of the following statements about tag restrictions is incorrect?

Tags help you to categorize your load balancers in different ways, for example, by purpose, owner, or environment. The following basic restrictions apply to tags: The maximum number of tags per resource is 10. The maximum key length is 127 Unicode characters. The maximum value length that can be used is 255 Unicode characters. The tag keys and values are case sensitive. Allowed characters are letters, spaces, and numbers representable in UTF-8, plus the following special characters: + - =. _ : / @. Do not use leading or trailing spaces. Do not use the aws: prefix in your tag names or values because it is reserved for AWS use. You can't edit or delete tag names or values with this prefix. Tags with this prefix do not count against your tags per resource limit.

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The user has configured AutoScaling based on the dynamic policy.

Which of the following is not the right command to specify a change in capacity as a part of the policy?

The user can configure the AutoScaling group to automatically scale up and then scale down based on the various specified CloudWatch monitoring conditions. The user needs to provide the adjustment value and the adjustment type. A positive adjustment value increases the current capacity and a negative adjustment value decreases the current capacity. The user can express the change to the current size as an absolute number, an increment or as a percentage of the current group size. In this option specifying the exact capacity with the adjustment value = -8 will not work as when type is exact capacity the adjustment value cannot be negative. http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/as-scale-based-on-demand.html

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An organization is hosting an application as part of the free usage tier.

The organization wants to create IAM users for each of its 150 employees and they may access AWS as part of free usage tier.

What will you advise the organization?

IAM is a free service. You can create as many IAM users or groups as desired free of cost. http://docs.aws.amazon.com/IAM/latest/UserGuide/IAM_Introduction.html

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Company A has an S3 bucket containing premier content that they intend to make available to only paid subscribers of their website.

The S3 bucket currently has default permissions of all objects being private to prevent inadvertent exposure of the premier content to non-paying website visitors.

How can Company A provide only paid subscribers the ability to download a premier content file in the S3 bucket?

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