DVA-C01 Amazon-Web-Services Exam Questions and Free Practice Test

Question 55

A user is having access to objects of an S3 bucket which is not owned by him. If he is trying to set the objects of that bucket public, which of the below mentioned options may be a right fit for this action?

A. Make the bucket public with full access

B. Define the policy for the bucket

C. Provide ACL on the object

D. Create an IAM user with permission

Correct Answer:C
An S3 object ACL is the only way to manage access to objects which are not owned by the bucket owner. An AWS account that owns the bucket can grant another AWS account permission to upload objects. The bucket owner does not own these objects. The AWS account that created the object must grant permissions using object ACLs.
Reference: http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-alternatives-guidelines.html

Question 56

A user has attached an EBS volume to a running Linux instance as a "/dev/sdf" device. The user is unable to see the attached device when he runs the command "df -h". What is the possible reason for this?

A. The volume is not in the same AZ of the instance

B. The volume is not formatted

C. The volume is not attached as a root device

D. The volume is not mounted

Correct Answer:D
When a user creates an EBS volume and attaches it as a device, it is required to mount the device. If the device/volume is not mounted it will not be available in the listing.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AmazonEBS.htmI

Question 57

Which of the following are valid SNS delivery transports? Choose 2 answers

A. HTTP

B. UDP

C. SNIS

D. DynamoDB

E. Named Pipes

Correct Answer:AC

Question 58

What is the maximum size for messages stored in SQS?

A. 256KB

B. 128KB

C. 1024KB

D. 64KB

Correct Answer:A
By default, SQS queues allow you to send the largest supported payload size, currently 256KB. You can choose to specify a limit on how many bytes can be sent per payload, using the lVIaximumlVIessageSize attribute of the SetQueueAttributes method.
Reference: http://aws.amazon.com/sqs/faqs/

Question 59

A user is trying to configure access with S3. Which of the following options is not possible to provide access to the S3 bucket / object?

A. Define the policy for the IAM user

B. Define the ACL for the object

C. Define the policy for the object

D. Define the policy for the bucket

Correct Answer:C
Amazon S3 offers access policy options broadly categorized as resource-based policies and user policies.
Access policies, such as ACL and resource policy can be attached to the bucket. With the object the user can only have ACL and not an object policy. The user can also attach access policies to the IAM users in the account. These are called user policies.
Reference: http://docs.aws.amazon.com/AmazonS3/latest/dev/s3-access-control.html

Question 60

A user has created an RDS instance with MySQL. The user is using the HeidiSQL client to connect with the RDS DB. The client is unable to connect to DB from his home machine. What is a possible reason for the failure?

A. The user has to open port 80 in the RDS security group to connect with RDS DNS

B. The security group is not configured to allow a request from the user’s IP on port 3306

C. You can never connect to RDS from your desktop

D. The user has to open port 22 in the RDS security group to connect with RDS DNS

Correct Answer:B
If the user needs to connect to RDS then he has to open port 3306 in the RDS security group for his IP address.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html

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