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Category: AWS-CDA (v.2)

Exam AWS-CDA: AWS Certified Developer – Associate (update July 11th, 2017)

You advise them to:

You are providing AWS consulting services for a company developing a new mobile application that will be
leveraging Amazon SNS Mobile Push for push notifications. In order to send direct notification messages to
individual devices each device registration identifier or token needs to be registered with SNS; however the
developers are not sure of the best way to do this.
You advise them to:

What is a possible solution to prevent this happening?

You have written an application that uses the Elastic Load Balancing service to spread traffic to several web
servers. Your users complain that they are sometimes forced to login again in the middle of using your
application, after they have already logged in. This is not behavior you have designed.
What is a possible solution to prevent this happening?

How can Company B reduce the number of empty responses?

Company B provides an online image recognition service and utilizes SQS to decouple system components for
scalability The SQS consumers poll the imaging queue as often as possible to keep end-to-end throughput as
high as possible. However, Company B is realizing that polling in tight loops is burning CPU cycles and
increasing costs with empty responses.
How can Company B reduce the number of empty responses?


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