AWS-Certified-Developer-Associate Exam
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Q61. What happens if your application performs more reads or writes than your provisioned capacity?
A. Nothing
B. requests above your provisioned capacity will be performed but you will receive 400 error codes.
C. requests above your provisioned capacity will be performed but you will receive 200 error codes.
D. requests above your provisioned capacity will be throttled and you will receive 400 error codes.
Answer: D
Explanation:
Speaking about DynamoDB, if your application performs more reads/second or writes/second than your tabIe’s provisioned throughput capacity allows, requests above your provisioned capacity will be throttled and you will receive 400 error codes.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputlntro.htmI
Q62. A user has enabled serverside encryption with S3. The user downloads the encrypted object from S3. How can the user decrypt it?
A. S3 does not support server side encryption
B. S3 provides a server side key to decrypt the object
C. The user needs to decrypt the object using their own private key
D. S3 manages encryption and decryption automatically
Answer: D
Explanation:
If the user is using the server-side encryption feature, Amazon S3 encrypts the object data before saving it on disks in its data centres and decrypts it when the user downloads the objects. Thus, the user is free from the tasks of managing encryption, encryption keys, and related tools.
Reference: http://docs.aws.amazon.com/AmazonS3/Iatest/dev/UsingEncryption.htmI
Q63. 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
Answer: D
Explanation:
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
Q64. In relation to Amazon Simple Workflow Service (Amazon SWF),what is an "ActMty Worker"?
A. An indMdual task undertaken by a workflow
B. The automation of a business process
C. A piece of software that implements tasks
D. All answers listed are correct
Answer: C
Explanation:
In relation to Amazon Simple Workflow Service (Amazon SWF), an actMty worker is a program that receives actMty tasks, performs them, and provides results back. Which translates to a piece of software that implements tasks.
Reference: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-develop-actMty.html
Q65. A user has created a new raw EBS volume. The user mounts the volume on the instance to which it is attached. Which of the below mentioned options is a required step before the user can mount the volume?
A. Run a cyclic check on the device for data consistency
B. Create a file system of the volume
C. No step is required. The user can directly mount the device
D. Resize the volume as per the original snapshot size
Answer: B
Explanation:
When a user is trying to mount a blank EBS volume, it is required that the user first creates a file system within the volume.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.htmI
Q66. What does Amazon SQS provide?
A. An asynchronous message queue service.
B. A Simple Query Sewer, managed directly by Amazon Web Services.
C. None of these.
D. A synchronous message queue service.
Answer: A
Explanation:
Amazon SQS stands for Simple Queue Services, and provides a cost-effective way to decouple the components of your application through an asynchronous message queue service
Reference: http://aws.amazon.com/sqs/
Q67. How long are the messages kept on an SQS queue by default?
A. If a message is not read, it is never deleted
B. 2 weeks
C. 1 day
D. 4 days
Answer: D
Explanation:
The SQS message retention period is configurable and can be set anywhere from 1 minute to 2 weeks. The default is 4 days and once the message retention limit is reached your messages will be automatically deleted. The option for longer message retention provides greater filexibility to allow for longer intervals between message production and consumption.
Reference: https://aws.amazon.com/sqs/faqs/
Q68. A user is planning to use EBS for his DB requirement. The user already has an EC2 instance running in the VPC private subnet. How can the user attach the EBS volume to a running instance?
A. The user must create EBS within the same VPC and then attach it to a running instance.
B. The user can create EBS in the same zone as the subnet of instance and attach that EBS to instance.
C. It is not possible to attach an EBS to an instance running in VPC until the instance is stopped.
D. The user can specify the same subnet while creating EBS and then attach it to a running instance.
Answer: B
Explanation:
A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. The user can create subnets as per the requirement within a VPC. The VPC is always specific to a region. The user can create a VPC which can span multiple Availability Zones by adding one or more subnets in each Availability Zone.
The instance launched will always be in the same availability zone of the respective subnet. When creating an EBS the user cannot specify the subnet or VPC. However, the user must create the EBS in the same zone as the instance so that it can attach the EBS volume to the running instance.
Reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Subnets.htm|#VPCSubnet
Q69. The user has created multiple AutoScaIing groups. The user is trying to create a new AS group but it fails. How can the user know that he has reached the AS group limit specified by AutoScaIing in that region?
A. Run the command: as-describe-account-limits
B. Run the command: as-describe-group-limits
C. Run the command: as-max-account-limits
D. Run the command: as-list-account-limits
Answer: A
Explanation:
A user can see the number of AutoScaIing resources currently allowed for the AWS account either by using the as-describe-account-Iimits command or by calling the DescribeAccountLimits action. Reference:http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/ts-as-capacity.html
Q70. In DynamoDB, the default table size is:
A. 5 GB
B. 1 GB
C. 10 GB
D. There is no table size
Answer: D
Explanation:
DynamoDB has seamless scalability with no table size limits and unlimited storage, so you shouIdn't be worried about managing storage on the host or to provisioning more drive, as your data requirement changes.
Reference: http://aws.amazon.com/dynamodb/