Practical DVA-C01 Torrent 2021

NEW QUESTION 1
Which features can be used to restrict access to data in S3? Choose 2 answers

• A. Use S3 Virtual Hosting
• B. Set an S3 Bucket policy.
• C. Enable IAM Identity Federation.
• D. Set an S3 ACL on the bucket or the object.
• E. Create a C|oudFront distribution for the bucket

Answer: CD

NEW QUESTION 2
In Amazon SNS, to send push notifications to mobile devices using Amazon SNS and ADM, you need to obtain the following, except:

• A. Client secret
• B. Client ID
• C. Device token
• D. Registration ID

Answer: C

Explanation:
To send push notifications to mobile devices using Amazon SNS and ADM, you need to obtain the following: Registration ID and Client secret.
Reference: http://docs.aws.amazon.com/sns/latest/dg/SNSMobiIePushPrereq.htmI

NEW QUESTION 3
Which of the following device names is recommended for an EBS volume that can be attached to an Amazon EC2 Instance running Windows?

• A. xvd[a-e]
• B. /mnt/sd[b-e]
• C. xvd[f-p]
• D. /dev/sda1

Answer: C

Explanation:
The xvd[f-p] is the recommended device name for EBS volumes that can be attached to the Amazon EC2 Instances running on Windows.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/device_naming.html

NEW QUESTION 4
A user has enabled automated backup for an RDS instance. What is the longest duration for which the user can retain the automated backup?

• A. 25 days
• B. 15 days
• C. 45 days
• D. 35 days

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. The maximum period can be 35 days.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonR DSInstances.htmI

NEW QUESTION 5
To scale up the AWS resources using manual AutoScaIing, which of the below mentioned parameters should the user change?

• A. Maximum capacity
• B. Desired capacity
• C. Preferred capacity
• D. Current capacity

Answer: B

Explanation:
The Manual Scaling as part of Auto Scaling allows the user to change the capacity of Auto Scaling group. The user can add / remove EC2 instances on the fly. To execute manual scaling, the user should modify the desired capacity. AutoScaIing will adjust instances as per the requirements. If the user is trying to CLI, he can use command as-set-desired-capacity <Auto Scaling Group Name> --desired-capacity <New Capacity>
Reference: http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/as-manual-scaling.htmI

NEW QUESTION 6
A user has configured an automated backup between 5 AM — 5:30 AM for the MySQL RDS DB. Will the performance of RDS get frozen momentarily during a backup?

• A. No
• B. Yes, only if the instance size is smaller than large size
• C. Yes, provided it is a single zone implementation
• D. Yes, always

Answer: C

Explanation:
Amazon RDS provides two different methods for backing up and restoring the Amazon DB instances. A brief I/O freeze, typically lasting a few seconds, occurs during both automated backups and DB snapshot operations on Single-AZ DB instances.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonR DSInstances.htmI

NEW QUESTION 7
How long can you keep your Amazon SQS messages in Amazon SQS queues?

• A. From 120 secs up to 4 weeks
• B. From 10 secs up to 7 days
• C. From 60 secs up to 2 weeks
• D. From 30 secs up to 1 week

Answer: C

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/

NEW QUESTION 8
A user has created a blank EBS volume in the US-East-1 region. The user is unable to attach the volume to a running instance in the same region. What could be the possible reason for this?

• A. The instance must be in a running stat
• B. It is required to stop the instance to attach volume
• C. The AZ for the instance and volume are different
• D. The instance is from an instance store backed AMI
• E. The instance has enabled the volume attach protection

Answer: B

Explanation:
An EBS volume provides persistent data storage. The user can attach a volume to any instance provided they are both in the same AZ. Even if they are in the same region but in a different AZ, it will not be able to attach the volume to that instance.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AmazonEBS.htmI

NEW QUESTION 9
Company D is running their corporate website on Amazon S3 accessed from http//www.companyd.com. Their marketing team has published new web fonts to a separate S3 bucket accessed by the S3 endpoint https://s3-us-westl.amazonaws.com/cdfonts. While testing the new web fonts, Company D recognized the web fonts are being blocked by the browser. What should Company D do to prevent the web fonts from being blocked by the browser?

• A. Enable versioning on the cdfonts bucket for each web font
• B. Create a policy on the cdfonts bucket to enable access to everyone
• C. Add the Content-NI D5 header to the request for webfonts in the cdfonts bucket from the website
• D. Configure the cdfonts bucket to allow cross-origin requests by creating a CORS configuration

Answer: D

NEW QUESTION 10
Which of the following is chosen as the default region when making an API call with an AWS SDK?

• A. ap-northeast-1
• B. us-west-2
• C. us-east-1
• D. eu-west-1
• E. us-central-1

Answer: C

NEW QUESTION 11
What AWS products and features can be deployed by Elastic Beanstalk? Choose 3 answers

• A. Auto scaling groups
• B. Route 53 hosted zones
• C. Elastic Load Balancers
• D. RDS Instances
• E. Elastic IP addresses
• F. SQS Queues

Answer: ACD

NEW QUESTION 12
In DynamoDB, a secondary index is a data structure that contains a subset of attributes from a table, along with an alternate key to support operations.

• A. None of the above
• B. Both
• C. Query
• D. Scan

Answer: C

Explanation:
In DynamoDB, a secondary index is a data structure that contains a subset of attributes from a table, along with an alternate key to support Query operations.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Secondarylndexes.htmI

NEW QUESTION 13
You cannot access your AWS console, so you revert to using the CLI that you are not familiar with. Which of the following commands is not a valid CLI command for EC2 instances?

• A. ec2-allocate-address
• B. ec2-attach-internet-gateway
• C. ec2-associate-route-table
• D. ec2-allocate-interface

Answer: D

Explanation:
You can use the CLI tools to manage your Amazon EC2 resources (such as instances, security groups, and volumes) and your Amazon VPC resources (such as VPCs, subnets, route tables, and Internet gateways). Before you can start using the tools, you must download and configure them.
The following are valid CLI commands for EC2 instances: ec2-accept-vpc-peering-connection
ec2-allocate-address
ec2-assign-private-ip-addresses ec2-associate-address
ec2-associate-dhcp-options ec2-associate-route-table
ec2-attach-internet-gateway
ec2-attach-network-interface (not ec2-allocate-interface) Reference:
http://docs.aws.amazon.com/AWSEC2/latest/CommandLineReference/command-reference.html

NEW QUESTION 14
Does Amazon DynamoDB support both increment and decrement atomic operations?

• A. No, neither increment nor decrement operations.
• B. Only increment, since decrement are inherently impossible with DynamoDB's data model.
• C. Only decrement, since increment are inherently impossible with DynamoDB's data model.
• D. Yes, both increment and decrement operation

Answer: D

Explanation:
Amazon DynamoDB supports increment and decrement atomic operations.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/APISummary.html

NEW QUESTION 15
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

Answer: B

Explanation:
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

NEW QUESTION 16
What is the maximum number of S3 Buckets available per AWS account?

• A. 100 per region
• B. there is no limit
• C. 100 per account
• D. 500 per account
• E. 100 per IAM user

Answer: C

NEW QUESTION 17
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 18
How can software determine the public and private IP addresses of the Amazon EC2 instance that it is running on?

• A. Query the appropriate Amazon CIoudWatch metric.
• B. Use ipconfig or ifconfig command.
• C. Query the local instance userdata.
• D. Query the local instance metadat

Answer: D

NEW QUESTION 19
When a Simple Queue Service message triggers a task that takes 5 minutes to complete, which process below will result in successful processing of the message and remove it from the queue while minimizing the chances of duplicate processing?

• A. Retrieve the message with an increased visibility timeout, process the message, delete the message from the queue
• B. Retrieve the message with an increased visibility timeout, delete the message from the queue, process the message
• C. Retrieve the message with increased DeIaySeconds, process the message, delete the message from the queue
• D. Retrieve the message with increased DeIaySeconds, delete the message from the queue, process the message

Answer: A

NEW QUESTION 20
Which one of the following data types does Amazon DynamoDB not support?

• A. Arrays
• B. String
• C. Binary
• D. Number Set

Answer: A

Explanation:
Amazon DynamoDB supports the following data types: Scalar data types (like Number, String, and Binary)
Multi-valued types (like String Set, Number Set, and Binary Set). Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModeI.htmI#DataModeI.Data Types

NEW QUESTION 21
In DynamoDB, if you create a table and request 10 units of write capacity and 200 units of read capacity of provisioned throughput, how much would you be charged in US East (Northern Virginia) Region?

• A. $0.05 per hour
• B. $0.10 per hour
• C. $0.03 per hour
• D. $0.15 per hour

Answer: A

Explanation:
To understand pricing in DynamoDB, consider the following example. If you create a table and request 10 units of write capacity and 200 units of read capacity of provisioned throughput, you would be charged:
$0.01 + (4 x $0.01) = $0.05 per hour
Reference: http://aws.amazon.com/dynamodb/pricing/

NEW QUESTION 22
You want to have multiple versions of your application running at the same time, with all versions launched via AWS Elastic Beanstalk. Is this possible?

• A. N
• B. However if you have 2 AWS accounts this can be done
• C. N
• D. AWS Elastic Beanstalk is not designed to support multiple running environments
• E. Ye
• F. AWS Elastic Beanstalk is designed to support a number of multiple running environments
• G. Ye
• H. However AWS Elastic Beanstalk is designed to support only 2 multiple running environments

Answer: C

Explanation:
AWS Elastic Beanstalk is designed to support multiple running environments. As an example you could have one for integration testing, one for pre-production, and one for production, with each environment independently configured and running on its own separate AWS resources.
Reference: https://aws.amazon.com/elasticbeansta|k/faqs/

NEW QUESTION 23
A user has set an IAM policy where it allows all requests if a request from IP 10.10.10.1/32. Another policy allows all the requests between 5 PM to 7 PM. What will happen when a user is requesting access from IP 10.10.10.1/32 at 6 PM?

• A. IAM will throw an error for policy conflict
• B. It is not possible to set a policy based on the time or IP
• C. It will deny access
• D. It will allow access

Answer: D

Explanation:
With regard to IAM, when a request is made, the AWS service decides whether a given request should be allowed or denied. The evaluation logic follows these rules:
By default, all requests are denied. (In general, requests made using the account credentials for resources in the account are always allowed.)
An explicit allow policy overrides this default. An explicit deny policy overrides any allows. Reference:
http://docs.aws.amazon.com/IAM/latest/UserGuide/AccessPoIicyLanguage_EvaIuationLogic.htmI

NEW QUESTION 24
Is it possible to create an S3 bucket accessible only by a certain IAM user, using policies in a C|oudFormation template?

• A. No, you can only create the S3 bucket but not the IAM user.
• B. S3 is not supported by CIoudFormation.
• C. Yes, all these resources can be created using a CIoudFormation template
• D. No, in the same template you can only create the S3 bucket and the realtive polic

Answer: C

Explanation:
With AWS Identity and Access Management (IAM), you can create IAM users to control who has access to which resources in your AWS account. You can use IAM with AWS CIoudFormation to control what AWS CIoudFormation actions users can perform, such as view stack templates, create stacks, or delete stacks.
In addition to AWS CIoudFormation actions, you can manage what AWS services and resources are available to each user.

NEW QUESTION 25
A user has an S3 object in the US Standard region with the content "coIor=red". The user updates the object with the content as "coIor="white". If the user tries to read the value 1 minute after it was uploaded, what will S3 return?

• A. It will return "coIor=white"
• B. It will return "coIor=red"
• C. It will return an error saying that the object was not found
• D. It may return either "coIor=red" or "color=white" i.
• E. any of the value

Answer: D

Explanation:
AWS S3 follows the eventual consistent model in the US Standard Region. Once the object is updated it
may return the new value or the old value based on whether all the content is replicated across multiple servers until it becomes consistent (eventual).
Reference: http://docs.aws.amazon.com/AmazonS3/Iatest/dev/Introduction.htmI

NEW QUESTION 26
Which DynamoDB limits can be raised by contacting AWS support? Choose 2 answers

• A. The number of hash keys per account
• B. The maximum storage used per account
• C. The number of tables per account
• D. The number of local secondary indexes per account
• E. The number of provisioned throughput units per account

Answer: CE

NEW QUESTION 27
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 28
When should a user try to Force Detach an EBS volume?

• A. If the volume is stuck in a detaching state
• B. If the volume is not accessible from the instance
• C. If the volume is not unmounted and the user still wants to detach
• D. If the volume is a root volume

Answer: A

Explanation:
If an EBS volume stays in the detaching state, the user can force the detachment by clicking Force Detach. Forcing the detachment can lead to either data loss or a corrupted file system. The user should use this option only as a last resort to detach a volume from a failed instance or if he is detaching a volume with the intention of deleting it.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-detaching-volume.html

NEW QUESTION 29
A user is trying to create a policy for an IAM user from the AWS console. Which of the below mentioned options is not available to the user while configuring policy?

• A. Use policy generator to create policy
• B. Use custom policy to create policy
• C. Use policy simulator to create policy
• D. Assign No permission

Answer: C

Explanation:
When a user is trying to create a policy from the AWS console, it will have options such as create policy from templates or use a policy generator. The user can also define a custom policy or chose the option to have no permission. The policy simulator is not available in the console.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/IAMBestPractices.html

NEW QUESTION 30
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