Top Tips Of Abreast Of The Times DVA-C01 Testing Bible

NEW QUESTION 1
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.
Reference: https://aws.amazon.com/items/1343?externaIID=1343

NEW QUESTION 2
ExamKiIIer has three AWS accounts. They have created separate IAM users within each account. ExamKiIIer wants a single IAM console URL such as https://examkiIIer.signin.aws.amazon.com/consoIe/ for all account users. How can this be achieved?

• A. Merge all the accounts with consolidated billing
• B. Create the same account alias with each account ID
• C. It is not possible to have the same IAM account login URL for separate AWS accounts
• D. Create the S3 bucket with an alias name and use the redirect rule to forward requests to various accounts

Answer: C

Explanation:
If a user wants the URL of the AWS IAM sign-in page to have a company name instead of the AWS account ID, he can create an alias for his AWS account ID. The alias should be unique.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/AccountAIias.html

NEW QUESTION 3
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

NEW QUESTION 4
A user is planning to host MS SQL on an EBS volume. It was recommended to use the AWS RDS. What advantages will the user have if he uses RDS in comparison to an EBS based DB?

• A. Better throughput with PIOPS
• B. Automated backup
• C. NIS SQL is not supported with RDS
• D. High availability with multi AZs

Answer: B

Explanation:
Comparing with on-premises or EC2 based NIS SQL, RDS provides an automated backup feature. PIOPS is available with both RDS and EBS. However, HA is not available with NIS SQL.
Reference: https://aws.amazon.com/rds/faqs/

NEW QUESTION 5
A user has configured ELB with two instances running in separate AZs of the same region? Which of the below mentioned statements is true?

• A. Nlulti AZ instances will provide HA with ELB
• B. lVIuIti AZ instances are not possible with a single ELB
• C. Nlulti AZ instances will provide scalability with ELB
• D. The user can achieve both HA and scalability with ELB

Answer: A

Explanation:
If a user is running two instances in separate AZs, it will provide HA with ELB since ELB will automatically stop routing the traffic to unhealthy instances and send it to healthy instances only.

NEW QUESTION 6
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.
Reference: https://aws.amazon.com/items/1343?externaI|D=1343

NEW QUESTION 7
A root account owner is trying to setup an additional level of security for all his IAM users. Which of the below mentioned options is a recommended solution for the account owner?

• A. Enable access key and secret access key for all the IAM users
• B. Enable MFA for all IAM users
• C. Enable the password for all the IAM users
• D. Enable MFA for the root account

Answer: B

Explanation:
Multi-Factor Authentication adds an extra level of security for all the users. The user can enable MFA for all IAM users which ensures that each user has to provide an extra six digit code for authentication. Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/Using_ManagingMFA.htmI

NEW QUESTION 8
A user has created an application which sends data to a log file. The server hosting the log files can be unavailable due to any reason. The user wants to make it so that whenever the log server is up it should be receMng the messages. Which of the below mentioned AWS services helps achieve this functionality?

• A. AWS Simple Workflow
• B. AWS Simple Task Service
• C. AWS Simple Notification Service
• D. AWS Simple Queue Service

Answer: D

Explanation:
Amazon Simple Queue Service (SQS) is a fast, reliable, scalable, and fully managed message queuing service. SQS provides a simple and cost-effective way to decouple the components of an application. The user can use SQS to transmit any volume of data without losing messages or requiring other services to always be available. Using SQS, the application has to just send the data to SQS and SQS transmits it to the log file whenever it is available.
Reference: http://aws.amazon.com/sqs/

NEW QUESTION 9
You are building an online store on AWS that uses SQS to process your customer orders. Your backend system needs those messages in the same sequence the customer orders have been put in. How can you achieve that?

• A. You can do this with SQS but you also need to use SWF
• B. Messages will arrive in the same order by default
• C. You can use sequencing information on each message
• D. It is not possible to do this with SQS

Answer: C

Explanation:
Amazon SQS is engineered to always be available and deliver messages. One of the resulting tradeoffs is that SQS does not guarantee first in, first out delivery of messages. For many distributed applications, each message can stand on its own, and as long as all messages are delivered, the order is not important. If your system requires that order be preserved, you can place sequencing information in each message,
so that you can reorder the messages when the queue returns them. Reference:
http://docs.aws.amazon.com/AWSSimpIeQueueService/latest/SQSDeveIoperGuide/\NeIcome.html

NEW QUESTION 10
A user has created a new EBS volume from an existing snapshot. 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 the file system of the volume
• C. Resize the volume as per the original snapshot size
• D. No step is require
• E. The user can directly mount the device

Answer: D

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. If the volume is created from an existing snapshot then the user needs not to create a file system on the volume as it will wipe out the existing data.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.htmI

NEW QUESTION 11
An orgAMzation has launched two applications: one for blogging and one for ECM on the same AWS Linux EC2 instance running in the AWS VPC. The orgAMzation has attached two private IPs (primary and secondary) to the above mentioned instance. The orgAMzation wants the instance OS to recognize the secondary IP address. How can the orgAMzation 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.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MuItipIeIP.html

NEW QUESTION 12
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?

• A. Store photos on an EBS volume ofthe web server
• B. Remove public read access and use signed URLs with expiry dates.
• C. Use C|oudFront distributions for static content.
• D. Block the IPs of the offending websites in Security Group

Answer: B

NEW QUESTION 13
An orgAMzation has 10000 employees. The orgAMzation wants to give restricted AWS access to each employee. How can the orgAMzation achieve this?

• A. Create an IAM user for each employee and make them a part of the group
• B. It is not recommended to support 10000 users with IAM
• C. Use STS and create the users’ run time
• D. Use Identity federation with SSO

Answer: D

Explanation:
Identity federation enables users from an existing directory to access resources within your AWS account,
making it easier to manage your users by maintaining their identities in a single place. In this case, the federated user is the only solution since AWS does not allow creating more than 5000 IAM users. Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/LimitationsOnEntities.html

NEW QUESTION 14
An orgAMzation is hosting an application as part of the free usage tier. The orgAMzation wants to create IAM users for each of its 150 employees and they may access AWS as part of free usage tier. What will you advise the orgAMzation?

• A. The IAM is not available as a part of the free usage tier
• B. Create IAM roles and give access based on role since it will not cost the user
• C. Do not create more than 100 users as it will cost the orgAMzation.
• D. Create IAM users for each employee as it does not cost

Answer: D

Explanation:
IAM is a free service. You can create as many IAM users or groups as desired free of cost. Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/IAM_Introduction.htm|

NEW QUESTION 15
ExamKiIIer (with AWS account ID 111122223333) has created 50 IAM users for its orgAMzation’s employees. What will be the AWS console URL for these associates?

• A. https:// 111122223333.signin.aws.amazon.com/conso|e/
• B. https:// signin.aws.amazon.com/consoIe/
• C. https://signin.aws.amazon.com/111122223333/conso|e/
• D. https://signin.aws.amazon.com/console/111122223333/

Answer: A

Explanation:
When an orgAMzation is using AWS IAM for creating various users and manage their access rights, the IAM user cannot use the login URL http://aws.amazon.com/console to access AWS management console. The console login URL for the IAM user will have AWS account ID of that orgAMzation to identify the IAM user belongs to particular account. The AWS console login URL for the IAM user will be https://
<AWS_Account_|D>.signin.aws.amazon.com/consoIe/. In this case it will be https:// 111122223333.signin.aws.amazon.com/consoIe/
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/AccountAIias.html

NEW QUESTION 16
Your manager has requested you to tag EC2 instances to orgAMze and manage a load balancer. Which of the following statements about tag restrictions is incorrect?

• A. The maximum key length is 127 Unicode characters.
• B. The maximum value length is 255 Unicode characters.
• C. Tag keys and values are case sensitive.
• D. The maximum number of tags per load balancer is 20.

Answer: D

Explanation:
Tags help you to categorize your load balancers in different ways, for example, by purpose, owner, or environment. The following basic restrictions apply to tags: The maximum number of tags per resource is
10. The maximum key length is 127 Unicode characters. The maximum value length that can be used is 255 Unicode characters. The tag keys and values are case sensitive. Allowed characters are letters, spaces, and numbers representable in UTF-8, plus the following special characters: + - =. _ : / @. Do not use leading or trailing spaces. Do not use the aws: prefix in your tag names or values because it is reserved for AWS use. You can't edit or delete tag names or values with this prefix. Tags with this prefix do not count against your tags per resource limit.
Reference:
http://docs.aws.amazon.com/EIasticLoadBaIancing/latest/DeveIoperGuide/add-remove-tags.htmI#tag-res trictions

NEW QUESTION 17
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 SimpIeDB
• 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.
Reference: https://aws.amazon.com/running_databases/#dynamodb_anchor

NEW QUESTION 18
Games-R-Us is launching a new game app for mobile devices. Users will log into the game using their existing Facebook account and the game will record player data and scoring information directly to a DynamoDB table.
What is the most secure approach for signing requests to the DynamoDB API?

• A. Create an IAM user with access credentials that are distributed with the mobile app to sign the requests
• B. Distribute the AWS root account access credentials with the mobile app to sign the requests
• C. Request temporary security credentials using web identity federation to sign the requests
• D. Establish cross account access between the mobile app and the DynamoDB table to sign the requests

Answer: C

NEW QUESTION 19
A user has launched a MySQL RDS. The user wants to plan for the DR and automate the snapshot. Which of the below mentioned functionality offers this option with RDS?

• A. Copy snapshot
• B. Automated synchronization
• C. Snapshot
• D. Automated backup

Answer: D

Explanation:
Amazon RDS provides two different methods for backing up and restoring the Amazon DB instances: automated backups and DB snapshots. Automated backups automatically back up the DB instance during a specific, user-definable backup window, and keep the backups for a limited, user-specified period of time.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonR DSInstances.htmI

NEW QUESTION 20
What is one key difference between an Amazon EBS-backed and an instance-store backed instance?

• A. Virtual Private Cloud requires EBS backed instances
• B. Amazon EBS-backed instances can be stopped and restarted
• C. Auto scaling requires using Amazon EBS-backed instances.
• D. Instance-store backed instances can be stopped and restarte

Answer: B

NEW QUESTION 21
In regard to DynamoDB, what is the Global secondary index?

• A. An index with a hash and range key that can be different from those on the table.
• B. An index that has the same range key as the table, but a different hash key
• C. An index that has the same hash key and range key as the table
• D. An index that has the same hash key as the table, but a different range key

Answer: A

Explanation:
Global secondary index - an index with a hash and range key that can be different from those on the table.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html

NEW QUESTION 22
You have a number of image files to encode. In an Amazon SQS worker queue, you create an Amazon SQS message for each file specifying the command (jpeg-encode) and the location of the file in Amazon S3. Which of the following statements best describes the functionality of Amazon SQS?

• A. Amazon SQS is for single-threaded sending or receMng speeds.
• B. Amazon SQS is a non-distributed queuing system.
• C. Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for single-threaded sending or receMng speeds.
• D. Amazon SQS is a distributed queuing system that is optimized for vertical scalability and for single-threaded sending or receMng speeds.

Answer: C

Explanation:
Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for
single-threaded sending or receMng speeds. A single client can send or receive Amazon SQS messages at a rate of about 5 to 50 messages per second. Higher receive performance can be achieved by requesting multiple messages (up to 10) in a single call. It may take several seconds before a message that has been to a queue is available to be received.
Reference: http://media.amazonwebservices.com/AWS_Storage_Options.pdf

NEW QUESTION 23
What item operation allows the retrieval of multiple items from a DynamoDB table in a single API call?

• A. Getltem
• B. BatchGetItem
• C. GetMu|tip|e|tems
• D. GetItemRange

Answer: B

NEW QUESTION 24
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

Answer: C

Explanation:
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

NEW QUESTION 25
Bob is an IAM user who has access to the EC2 services. Admin is an IAM user who has access to all the AWS services including IAM. Can Bob change his password?

• A. No, the IAM user can never change the password
• B. Yes, provided Admin has given Bob access to change his password
• C. Yes, only from AWS CLI
• D. Yes, only from the AWS console

Answer: B

Explanation:
The IAM users by default cannot change their password. The root owner or IAM administrator needs to set the policy in the password policy page, which should allow the user to change their password. Once it is enabled, the IAM user can always change their passwords from the AWS console or CLI.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/Using_ManagingUserPwdSeIf.htm|

NEW QUESTION 26
A user is enabling a static website hosting on an S3 bucket. Which of the below mentioned parameters cannot be configured by the user?

• A. Error document
• B. Conditional error on object name
• C. Index document
• D. Conditional redirection on object name

Answer: B

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 user can configure the index, error document as well as configure the conditional routing of on object name.
Reference: http://docs.aws.amazon.com/AmazonS3/Iatest/dev/HowDoIWebsiteConfiguration.htm|

NEW QUESTION 27
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