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QUESTION NO: 1
Your company has an on-premises, multi-tier PHP web application, which recently experienced downtime due to a large burst in web traffic due to a company announcement. Over the coming days, you're expecting similar announcements to drive similar unpredictable bursts, and are looking to find ways to quickly improve your infrastructures ability to handle unexpected increases in traffic. The application currently consists of 2 tiers: A web tier, which consists of a load balancer and several Linux Apache web servers, as well as a database tier, which hosts a Linux server hosting a
MySQL database.
Which scenario below will provide full site functionality, while helping to improve the availability of your application in the short timeframe required?
A. Migrate to AWS:
Use VM Import/Export to quickly convert an on-premises web server to an AMI.
Create an Auto Scaling group, which uses the imported AMI to scale the web tier based on incoming traffic.
Create an RDS read replica and setup replication between the RDS instance and on-premises MySQL server to migrate the database.
B. Failover environment:
Create an S3 bucket and configure it for website hosting.
Migrate your DNS to Route53 using zone file import, and leverage Route53 DNS failover to failover to the S3 hosted website.
C. Hybrid environment:
Create an AMI, which can be used to launch web servers in EC2.
Create an Auto Scaling group, which uses the AMI to scale the web tier based on incoming traffic.
Leverage Elastic Load Balancing to balance traffic between on-premises web servers and those hosted In AWS.
D. Offload traffic from on-premises environment:
Setup a CIoudFront distribution, and configure CloudFront to cache objects from a custom origin.
Choose to customize your object cache behavior, and select a TTL that objects should exist in cache.
Answer: D
Explanation:
You can have CloudFront sit in front of your on-prem web environment, via a custom origin (the origin doesn't have to be in AWS). This would protect against unexpected bursts in traffic by letting
CloudFront handle the traffic that it can out of cache, thus hopefully removing some of the load from your on-prem web servers.

QUESTION NO: 2
A company is storing data on Amazon Simple Storage Service (S3). The company's security policy mandates that data is encrypted at rest. Which of the following methods can achieve this?
Choose 3 answers
A. Use Amazon S3 server-side encryption with AWS Key Management Service managed keys.
B. Use SSL to encrypt the data while in transit to Amazon S3.
C. Encrypt the data on the client-side before ingesting to Amazon S3 using their own master key.
D. Use Amazon S3 bucket policies to restrict access to the data at rest.
E. Use Amazon S3 server-side encryption with customer-provided keys.
F. Use Amazon S3 server-side encryption with EC2 key pair.
Answer: A,C,E

QUESTION NO: 3
A company is running multiple applications on Amazon EC2. Each application is deployed and managed by multiple business units. All applications are deployed on a single AWS account but on different virtual private clouds (VPCs). The company uses a separate VPC in the same account for test and development purposes.
Production applications suffered multiple outages when users accidentally terminated and modified resources that belonged to another business unit. A Solutions Architect has been asked to improve the availability of the company applications while allowing the Developers access to the resources they need.
Which option meets the requirements with the LEAST disruption?
A. Create an AWS account for each business unit. Move each business unit's instances to its own account and set up a federation to allow users to access their business unit's account.
B. Set up a federation to allow users to use their corporate credentials, and lock the users down to their own VPC. Use a network ACL to block each VPC from accessing other VPCs.
C. Implement a tagging policy based on business units. Create an IAM policy so that each user can terminate instances belonging to their own business units only.
D. Set up role-based access for each user and provide limited permissions based on individual roles and the services for which each user is responsible.
Answer: C
Explanation:
Principal - Control what the person making the request (the principal) is allowed to do based on the tags that are attached to that person's IAM user or role. To do this, use the aws:PrincipalTag/key- name condition key to specify what tags must be attached to the IAM user or role before the request is allowed.
https://docs.aws.amazon.com/IAM/latest/UserGuide/access_iam-tags.html
A: This would be too disruptive and Organizations should be used instead.
B: Question did not say if prod\dev\test are in separate VPC or not. It could be separated using business units instead. Hence this is not feasible.
D: This is too much effort and disruption.

QUESTION NO: 4
By default, temporary security credentials for an IAM user are valid for a maximum of 12 hours, but you can request a duration as long as ______ hours.
A. 48
B. 10
C. 24
D. 36
Answer: D
Explanation:
By default, temporary security credentials for an IAM user are valid for a maximum of 12 hours, but you can request a duration as short as 15 minutes or as long as 36 hours.
http://docs.aws.amazon.com/STS/latest/UsingSTS/CreatingSessionTokens.html

QUESTION NO: 5
You create an Amazon Elastic File System (EFS) file system and mount targets for the file system in your Virtual Private Cloud (VPC). Identify the initial permissions you can grant to the group root of your file system.
A. write-execute-modify
B. read-write
C. read-write-modify
D. read-execute
Answer: D
Explanation:
In Amazon EFS, when a file system and mount targets are created in your VPC, you can mount the remote file system locally on your Amazon Elastic Compute Cloud (EC2) instance. You can grant permissions to the users of your file system. The initial permissions mode allowed for Amazon EFS are:
read-write-execute permissions to the owner root
read-execute permissions to the group root
read-execute permissions to others
http://docs.aws.amazon.com/efs/latest/ug/accessing-fs-nfs-permissions.html

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Updated: May 28, 2022