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QUESTION 1
A user plans to use RDS as a managed DB platform. Which of the below mentioned features is not supported by RDS?
A. Automated backup
B. Automated scaling to manage a higher load
C. Automated failure detection and recovery
D. Automated software patching
Answer: B
Explanation:
AWS RDS provides a managed DB platform, which offers features, such as automated backup, patch management, automated failure detection and recovery. The scaling is not automated and the user needs to plan it with a few clicks.
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html
QUESTION 2
A user has not enabled versioning on an S3 bucket. What will be the version ID of the object inside that bucket?
A. 0
B. There will be no version attached
C. Null
D. Blank
Answer: C
Explanation:
S3 objects stored in the bucket before the user has set the versioning state have a version ID of null. When the user enables versioning, the objects in the bucket do not change and their ID remains null.
http://docs.aws.amazon.com/AmazonS3/latest/dev/AddingObjectstoVersionSuspendedBuckets.html
QUESTION 3
A user has created a queue named “myqueue” with SQS. There are four messages published to queue which are not received by the consumer yet. If the user tries to delete the queue, what will happen?
A. A user can never delete a queue manually. AWS deletes it after 30 days of inactivity on queue
B. It will initiate the delete but wait for four days before deleting until all messages are deleted automatically
C. It will ask user to delete the messages first
D. It will delete the queue
Answer: D
Explanation:
SQS allows the user to move data between distributed components of applications so they can perform different tasks without losing messages or requiring each component to be always available. The user can delete a queue at any time, whether it is empty or not. It is important to note that queues retain messages for a set period of time. By default, a queue retains messages for four days.
http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/SQSConcepts.html
QUESTION 4
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 table’s provisioned throughput capacity allows, requests above your provisioned capacity will be throttled and you will receive 400 error codes.
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html
QUESTION 5
In relation to Amazon SQS, how can you ensure that messages are delivered in order?
A. Increase the size of your queue
B. Send them with a timestamp
C. Give each message a unique id
D. AWS cannot guarantee that you will receive messages in the exact order you sent them
Answer: D
Explanation:
Amazon SQS makes a best effort to preserve order in messages, but due to the distributed nature of the queue, AWS cannot guarantee that you will receive messages in the exact order you sent them. You typically place sequencing information or timestamps in your messages so that you can reorder them upon receipt.
https://aws.amazon.com/items/1343?externalID=1343
QUESTION 6
An organization has launched two applications: one for blogging and one for ECM on the same AWS Linux EC2 instance running in the AWS VPC. The organization has attached two private IPs (primary and secondary) to the above mentioned instance. The organization wants the instance OS to recognize the secondary IP address. How can the organization configure this?
A. Use the ec2-net-utility package which updates routing tables, uses DHCP to refresh the secondary IP and adds the network interface
B. Use the ec2-net-utils package which will configure an additional network interface and update the routing table
C. Use the ec2-ip-update package which can configure the network interface as well as update the secondary IP with DHCP
D. Use the ec2-ip-utility package which can update the routing tables as well as refresh the secondary IP using DHCP
Answer: B
Explanation:
A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. It enables the user to launch AWS resources into a virtual network that the user has defined. With VPC the user can specify multiple private IP addresses for his instances. The number of network interfaces and private IP addresses that a user can specify for an instance depends on the instance type. This scenario helps when the user wants to host multiple websites on a single EC2 instance. After the user has assigned a secondary private IP address to his instance, he needs to configure the operating system on that instance to recognize the secondary private IP address. For AWS Linux, the ec2-net-utils package can take care of this step. It configures additional network interfaces that the user can attach while the instance is running, refreshes secondary IP addresses during DHCP lease renewal, and updates the related routing rules.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MultipleIP.html
QUESTION 7
What kind of service is provided by AWS DynamoDB?
A. Relational Database
B. NoSQL Database
C. Dynamic Database
D. Document Database
Answer: B
Explanation:
DynamoDB is a fast, fully managed NoSQL database service.
http://aws.amazon.com/dynamodb/
QUESTION 8
In relation to Amazon SQS, how many queues and messages can you have per queue for each user?
A. Unlimited
B. 10
C. 256
D. 500
Answer: A
Explanation:
Amazon SQS supports an unlimited number of queues and unlimited number of messages per queue for each user. Please be aware that Amazon SQS automatically deletes messages that have been in the queue for more than 4 days.
https://aws.amazon.com/items/1343?externalID=1343
QUESTION 9
Doug has created a VPC with CIDR 10.201.0.0/16 in his AWS account. In this VPC he has created a public subnet with CIDR block 10.201.31.0/24. While launching a new EC2 from the console, he is not able to assign the private IP address 10.201.31.6 to this instance. Which is the most likely reason for this issue?
A. Private IP address 10.201.31.6 is not part of the associated subnet’s IP address range.
B. Private IP address 10.201.31.6 is blocked via ACLs in Amazon infrastructure as a part of platform security.
C. Private address IP 10.201.31.6 is currently assigned to another interface.
D. Private IP address 10.201.31.6 is reserved by Amazon for IP networking purposes.
Answer: C
Explanation:
In Amazon VPC, you can assign any Private IP address to your instance as long as it is:
Part of the associated subnet’s IP address range
Not reserved by Amazon for IP networking purposes
Not currently assigned to another interface
http://aws.amazon.com/vpc/faqs/
QUESTION 10
Regarding Amazon SQS, are there restrictions on the names of Amazon SQS queues?
A. No
B. Yes. Queue names must be unique within an AWS account and you cannot use hyphens (-) and underscores (_)
C. Yes. Queue names are limited to 80 characters and queue names must be unique within an AWS account
D. Yes. Queue names are limited to 80 characters but queue names do not need to be unique within an AWS account
Answer: C
Explanation:
Queue names are limited to 80 characters. Alphanumeric characters plus hyphens (-) and underscores (_) are allowed. Queue names must be unique within an AWS account. After you delete a queue, you can reuse the queue name.
https://aws.amazon.com/sqs/faqs/
QUESTION 11
A user is planning to host a web server as well as an app server on a single EC2 instance which is a part of the public subnet of a VPC. How can the user setup to have two separate public IPs and separate security groups for both the application as well as the web server?
A. Launch a VPC instance with two network interfaces. Assign a separate security group to each and AWS will assign a separate public IP to them.
B. Launch VPC with two separate subnets and make the instance a part of both the subnets.
C. Launch a VPC instance with two network interfaces. Assign a separate security group and elastic IP to them.
D. Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subnet.
Answer: C
Explanation:
If you need to host multiple websites(with different IPs) on a single EC2 instance, the following is the suggested method from AWS:
– Launch a VPC instance with two network interfaces
– Assign elastic IPs from VPC EIP pool to those interfaces (Because, when the user has attached more than one network interface with an instance, AWS cannot assign public IPs to them)
– Assign separate Security Groups if separate Security Groups are needed
This scenario also helps for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MultipleIP.html
QUESTION 12
An online gaming site asked you if you can deploy a database that is a fast, highly scalable NoSQL database service in AWS for a new site that he wants to build. Which database should you recommend?
A. Amazon Redshift
B. Amazon SimpleDB
C. Amazon DynamoDB
D. Amazon RDS
Answer: C
Explanation:
Amazon DynamoDB is ideal for database applications that require very low latency and predictable performance at any scale but don’t need complex querying capabilities like joins or transactions. Amazon DynamoDB is a fully-managed NoSQL database service that offers high performance, predictable throughput and low cost. It is easy to set up, operate, and scale. With Amazon DynamoDB, you can start small, specify the throughput and storage you need, and easily scale your capacity requirements on the fly. Amazon DynamoDB automatically partitions data over a number of servers to meet your request capacity. In addition, DynamoDB automatically replicates your data synchronously across multiple Availability Zones within an AWS Region to ensure high-availability and data durability.
https://aws.amazon.com/running_databases/#dynamodb_anchor
QUESTION 13
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 flexibility to allow for longer intervals between message production and consumption.
https://aws.amazon.com/sqs/faqs/
QUESTION 14
Regarding Amazon SWF, the coordination logic in a workflow is contained in a software program called a ____.
A. Handler
B. Decider
C. Cordinator
D. Worker
Answer: B
Explanation:
In Amazon SWF, the coordination logic in a workflow is contained in a software program called a decider. The decider schedules activity tasks, provides input data to the activity workers, processes events that arrive while the workflow is in progress, and ultimately ends (or closes) the workflow when the objective has been completed.
http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html
QUESTION 15
A user has attached one RDS security group with 5 RDS instances. The user has changed the ingress rule for the security group. What will be the initial status of the ingress rule?
A. Approving
B. Implementing
C. Authorizing
D. It is not possible to assign a single group to multiple DB instances
Answer: C
Explanation:
When the user makes any changes to the RDS security group the rule status will be authorizing for some time until the changes are applied to all instances that the group is connected with. Once the changes are propagated the rule status will change to authorized.
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithSecurityGroups.html
QUESTION 16
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.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AmazonEBS.html
QUESTION 17
An account owner has created an IAM user with the name passleader. The account owner wants to give EC2 access of only the US West region to that IAM user. How can the owner configure this?
A. While creating a policy provide the region as a part of the resources
B. Create an IAM user in the US West region and give access to EC2
C. Create an IAM policy and define the region in the condition
D. It is not possible to provide access based on the region
Answer: C
Explanation:
The IAM policy is never region specific. If the user wants to configure the region specific setting, he needs to provide conditions as part of the policy.
http://awspolicygen.s3.amazonaws.com/policygen.html
QUESTION 18
What is the maximum time messages can be stored in SQS?
A. 14 days
B. one month
C. 4 days
D. 7 days
Answer: A
Explanation:
A message can be stored in the Simple Queue Service (SQS) from 1 minute up to a maximum of 14 days.
http://aws.amazon.com/sqs/faqs/#How_long_can_I_keep_my_messages_in_Amazon_SQS_queues
QUESTION 19
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 shouldn’t be worried about managing storage on the host or to provisioning more drive, as your data requirement changes.
http://aws.amazon.com/dynamodb/
QUESTION 20
A user is launching an AWS RDS instance with MySQL. The user wants to enable the Multi AZ feature. Which of the below mentioned parameters will not be allowed to configure by RDS?
A. Availability Zone
B. Region
C. DB subnet group
D. Database port
Answer: A
Explanation:
If the user is launching RDS with Multi AZ the user cannot provision the Availability Zone. RDS is launched automatically instead.
https://console.aws.amazon.com/rds/
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