AWS Certified Developer - Associate Questions and Answers (Dumps and Practice Questions)
Question : Being a HadoopExam.com AWS Developer you have enabled versioning of a bucket.
Is it possible to store all the versions of the objects in RRS and the current version of the object in S3?
1. Yes, only if the life cycle rule is set
2. Yes
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4. No
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Explanation: It is not possible to change the storage class of a specific version of an object in Amazon S3. When the user copies it, Amazon S3 gives it a new version ID.
Question : Being a HadoopExam.com AWS Developer you are exploring options to work with AWS S.
Which of the below mentioned statements does not help user with respect to AWS S3?
1. The user can store a php file in AWS S3
2. The user can create a bucket with the same name as the user domain on S3
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4. The user can host a dynamic website with Cloudfront
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Explanation: A user can create an S3 bucket which maps to his domain name as well as store a static website on S3. The user can upload a php file to S3, but it will not be processed as S3 cannot host a dynamic website.
Question : Being a HadoopExam.com AWS Developer you have enabled a static website with AWS S. The user already has index.html as a part of this bucket.
What difference will be there for the user while using this hosting feature?
1. Nothing. the user can always access index.html without the hosting feature
2. It helps the user to save some costs as it will not consider the I/O charges if website hosting is enabled
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4. The user can directly access the website using the region specific endpoint
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Explanation: To host a static website, the user needs to configure an Amazon S3 bucket for website hosting and then upload the website contents to the bucket. The website is then available at the region-specific website endpoint of the bucket. If the user has an index.html object as part of the bucket, the user can always host it without the website hosting feature. However, it will require an absolute URL of the object. In this case the user can access the whole bucket as a website and need not refer individual objects separately.
Related Questions
Question :
You attempt to store an object in the US-STANDARD region in Amazon S3 and receive a confirmation
that it has been successfully stored. You then immediately make another API call and attempt to read this object.
S3 tells you that the object does not exist. What could explain this behavior?
1. US - STANDARD uses eventual consistency and it can take time for an object to be readable in a bucket.
2. Objects in Amazon S3 do not become visible until they are replicated to a second region.
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4. You exceeded the bucket object limit and once this limit is raised the object will be visible.
Question : When uploading an object, what request header can be explicitly specified in a request to
Amazon S3 to encrypt object data when saved on the server side?
1. x-amz-storage-class
2. Content-MD5
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4. x-amz-server-side-encryption
Ans : 4
Exp : Protecting Data Using Server-Side Encryption with Amazon S3-Managed Encryption Keys (SSE-S3)
Server-side encryption is about protecting data at rest. Server-side encryption with Amazon S3-managed encryption keys (SSE-S3) employs strong multi-factor encryption. Amazon S3 encrypts each object with a unique key. As an additional safeguard, it encrypts the key itself with a master key that it regularly rotates. Amazon S3 server-side encryption uses one of the strongest block ciphers available, 256-bit Advanced Encryption Standard (AES-256), to encrypt your data.
Amazon S3 supports bucket policies that you can use if you require server-side encryption for all objects that are stored in your bucket. For example, the following bucket policy denies upload object (s3:PutObject) permission to everyone if the request does not include the x-amz-server-side-encryption header requesting server-side encryption.
{
"Version":"2012-10-17",
"Id":"PutObjPolicy",
"Statement":[{
"Sid":"DenyUnEncryptedObjectUploads",
"Effect":"Deny",
"Principal":"*",
"Action":"s3:PutObject",
"Resource":"arn:aws:s3:::YourBucket/*",
"Condition":{
"StringNotEquals":{
"s3:x-amz-server-side-encryption":"AES256"
}
}
}
]
}
Server-side encryption encrypts only the object data. Any object metadata is not encrypted.
Question : Select correct statement about DynamoDB ?
1. DynamoDB restricts item access during reads
2. DynamoDB restricts item access during writes
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4. DynamoDB uses conditional writes for consistency
Question : Select the correct statements about DynamoDB ?
1. DynamoDB does not support conditional writes
2. DynamoDB uses optimistic concurrency control
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4. None of the above
Question : What is one key difference between an Amazon EBS-backed and an instance-store backed instance?
1. store backed instances can be stopped and restarted
2. Auto scaling requires using Amazon EBS - backed instances
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4. Virtual Private Cloud requires EBS backed instances
Question :
You run an ad-supported photo sharing website using S3 to serve photos to visitors of your site.
At some point you find out that other sites have been linking to the photos on your site, causing loss to your business.
What is an effective method to mitigate this?
1. Use CloudFront distributions for static content.
2. Remove public read access and use signed URLs with expiry dates.
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4. Store photos on an EBS volume of the web server.
Question :
Your application is trying to upload a 6 GB file to Simple Storage Service and you receive a
"Your proposed upload exceeds the maximum allowed object size." error message. What is a possible solution for this?
1. API for this object Contact support to increase your object size limit
2. API for this object Use the large object upload
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4. None, Simple Storage Service objects are limited to 5 GB