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AWS Certified Developer - Associate Questions and Answers (Dumps and Practice Questions)



Question : How do you define the Activity Task, in the context of Amazon Simple Workflow

: How do you define the Activity Task, in the context of Amazon Simple Workflow
1. It is a definition of the Activity
2. One invocation of an activity
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4. Collection of activity


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Explanation: Lets have and example of SWF, in a customer-order workflow, you might have an activity that handles purchased items.
If the customer purchases multiple items, then this activity would have to run multiple times.
Amazon SWF has the concept of an activity task that represents one invocation of an activity.
In this example, the processing of each item would be represented by a single activity task.






Question : Which region does not support read after write for objects on S?

: Which region does not support read after write for objects on S?
1. US West Oregon
2. US West
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4. US Standard

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Explanation: You can choose the geographical Region where Amazon S3 will store the buckets you create. You might choose a Region to optimize latency, minimize costs, or address regulatory requirements. Amazon S3 currently supports the following Regions:

US Standard Uses Amazon S3 servers in the United States : Provides eventual consistency for all requests. This region automatically routes requests to facilities in Northern Virginia or the Pacific Northwest using network maps.

US West (Oregon) Region Uses Amazon S3 servers in Oregon : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

US West (Northern California) Region Uses Amazon S3 servers in Northern California : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

EU (Ireland) Region Uses Amazon S3 servers in Ireland : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

Asia Pacific (Singapore) Region Uses Amazon S3 servers in Singapore : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

Asia Pacific (Sydney) Region Uses Amazon S3 servers in Sydney : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

Asia Pacific (Tokyo) Region Uses Amazon S3 servers in Tokyo : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

South America (Sao Paulo) Region Uses Amazon S3 servers in Sao Paulo : Provides read-after-write consistency for PUTS of new objects in your Amazon S3 bucket and eventual consistency for overwrite PUTS and DELETES.

Objects stored in a Region never leave the Region unless you explicitly transfer them to another Region. For example, objects stored in the EU (Ireland) Region never leave it.







Question :

What would be the best way to set permissions on an S3 bucket if you would like to deliver the content over the internet but only to your employees?
:
1. Use S3 signed URL's through the API
2. Create an S3 account for every employee
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4. None of the above



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Explanation: A pre-signed URL gives you access to the object identified in the URL, provided that the creator of the pre-signed URL has permissions to access that object. That is, if you receive a pre-signed URL to upload an object, you can upload the object only if the creator of the pre-signed URL has the necessary permissions to upload that object.

All objects and buckets by default are private. The pre-signed URLs are useful if you want your user/customer to be able upload a specific object to your bucket, but you don't require them to have AWS security credentials or permissions. When you create a pre-signed URL, you must provide your security credentials, specify a bucket name an object key, an HTTP method (PUT of uploading objects) and an expiration date and time. The pre-signed URLs are valid only for the specified duration.

You can generate a pre-signed URL programmatically using the AWS SDK for Java or the AWS SDK for .NET. If you are using Visual Studio, you can also use the AWS Explorer to generate a pre-signed object URL without writing any code. Anyone who receives a valid pre-signed URL can then programmatically upload an object.

Note

Anyone with valid security credentials can create a pre-signed URL. However, in order to successfully upload an object, the pre-signed URL must be created by someone who has permission to perform the operation that the pre-signed URL is based upon.




Related Questions

Question : You are working with the HadoopExam training videos website, where end user keep uploading the videos which will be transcoded.

HadoopExam video transcoding website uses Amazon EC2, Amazon S3, and Amazon SimpleDB together and to integrate all this component or create automated workflow,
Which of the following AWS component can be used to integrate all this component and create automated workflow ?
Hence multiple components or modules can communicate with each other. Even though, all component can not process the same amount of work simultaneously

 : You are working with the HadoopExam training videos website, where end user keep uploading the videos which will be transcoded.
1. There is no need of any other component because Amazon EC2, Amazon S3, and Amazon SimpleDB can communicate with each other.
2. You need to implement Inter Process Communication (IPC)
3. You have to create VPC and put all these three components in it, hence they can communicate with each other.
4. You can use Amazon SQS component




Question : You are developing a service to continuously post the stock market price,
by reading from SQS queue. Which of the following SQS interface you can use in your implememntation



 : You are developing a service to continuously post the stock market price,
1. standards-based SOAP
2. Query web services
3. You have to write custom code which implements the SQS interfaces (missing numeric value)
4. 1 and 2
5. 1, 2 and 3



Question : You have processing a message, and max number of processing atttempts have been reached.
After that also you want to process the same message, what is the correct choice so that you can process this message again


 : You have processing a message, and max number of processing atttempts have been reached.
1. Persist the message in your application
2. Persist the message in DataBase
3. Not possible, once message has been reached max attempts
4. set up a DLQ