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AWS Certified Solutions Architect - Professional Questions and Answers (Dumps and Practice Questions)



Question : QuickTechie.com is setting up a multi-site solution where the application runs on premise as well as on AWS
to achieve the minimum RTP. They have database as Oracle in backend.
Select the configurations which is not the requirements of the multi-site solution scenario?
: QuickTechie.com is setting up a multi-site solution where the application runs on premise as well as on AWS
1. Configure data replication based on RTO.
2. Setup a single DB instance which will be accessed by both sites.
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4. Setup a weighted DNS service like Route 53 to route traffic across sites.


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Exp: AWS has many solutions for DR and HA. When the organization wants to have HA and DR with multi-site solution, it should setup two sites: one on premise and the other on AWS with
full capacity. The organization should setup a weighted DNS service which can route traffic to both sites based on the weightage. When one of the sites fails it can route the entire
load to another site. The organization would have minimal RTP in this scenario. If the organization setups a single DB instance, it will not work well in failover.
Instead they should have two separate DBs in each site and setup data replication based on RTO of the organization.








Question : QuickTechie.com is hosting a scalable web application using AWS. And configured internet facing ELB
and Auto Scaling to make the application scalable. Which of the below mentioned statements is required to be followed when the
application is planning to host a website on VPC?
: QuickTechie.com is hosting a scalable web application using AWS. And configured internet facing ELB
1. The ELB can be in a public or a private subnet but should have the ENI which is attached to an elastic IP.
2. The ELB must not be in any subnet; instead it should face the internet directly.
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4. The ELB must be in a public subnet of the VPC to face the internet traffic.

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Exp: : To create and use ELB load balancers within a VPC, you have to first configure your VPC environment by creating a VPC, creating one or more subnets, and then launch your
instances in the subnets.

Here are some tips on configuring your VPC and subnets for Elastic Load Balancing.

Create your VPC with an Internet gateway in the region where you want to launch your instances and load balancer.

If you are a new customer or if you are using the region you have not previously used, you are likely to get a default VPC, by default. You can either use the default VPC or
create your own.

Create subnets in each Availability Zone in which you want to launch your instances. Depending on your use case, your security and operational requirements, the subnets where you
want to launch your instances can either be a private subnet or a public subnet.

Instances launched in a private subnet cannot communicate with the Internet. If you want your instances in private subnet to have outbound internet access only, place a network
address translation (NAT) instance in a public subnet. A NAT instance enables instances in the private subnet to initiate outbound traffic to the Internet, but prevents them from
receiving inbound traffic.

You can optionally create a separate subnet for your load balancer. Your instances do not need to be in the same subnet that has your load balancer. If you plan to place your
load balancer and your back-end instances in separate subnets, make sure to configure the security group rules and network ACLs to allow traffic to be routed between the subnets
in your VPC. If your rules are not configured correctly, instances in other subnets may not be reachable by the load balancer in a different subnet.

To ensure that your load balancer can scale properly, make sure that the subnet in which you plan to place your load balancer has CIDR block of at least a /27 bitmask (e.g.,
10.0.0.0/27) and also has at least 8 free IP addresses. When you create your load balancer and place it in a subnet, this defines the subnet that traffic must enter to forward
the request to registered instances.

Important

If you are creating an Internet-facing load balancer, make sure to place your load balancer in a public subnet. After you create the public subnet, make sure to associate the
route table of your public subnet with the Internet gateway to enable your load balancer in the subnet to connect with the Internet.

If you are planning to register linked EC2-Classic instances with your load balancer, make sure to enable your VPC for ClassicLink after you create it, and then create your load
balancer in that VPC.

The most common VPC scenarios are documented in the Scenarios for Amazon VPC. Each of these scenarios has a link to a detailed explanation of the scenario. At the end of the section
is a section called Implementing the Scenario that gives you instructions on how to create a VPC for that scenario. You can follow the instructions from the scenario that best suits
your use case to create your VPC environment.




Question : www.HadoopExam.com is planning to create a secure, scalable and HA system on the AWS VPC.
Which of the below mentioned configurations will not help HadoopExam to achieve their goals if they are planning to use the AWS VPC?
: www.HadoopExam.com is planning to create a secure, scalable and HA system on the AWS VPC.
1. Setup CloudWatch which will monitor the AWS instances and trigger an alert to the Auto Scaling group when there is some odd behaviour.
2. Setup Auto Scaling with multiple public subnets in separate zones from the same VPC.
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4. Setup the internet facing ELB with VPC which is facing external traffic and has all instances registered with it.

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Exp: Amazon Virtual Private Cloud (Amazon VPC) enables you to define a virtual networking environment in a private, isolated section of the AWS cloud. You have complete control over
your virtual networking environment. For more information, see the Amazon VPC User Guide.

Within a virtual private cloud (VPC), you can launch AWS resources such as an Auto Scaling group. An Auto Scaling group in a VPC works essentially the same way as it does on Amazon
EC2 and supports the same set of features. This section provides you with an overview of Auto Scaling groups in a VPC and steps you through the process of creating an Auto Scaling
group in a VPC. If you want to launch your Auto Scaling instances in Amazon EC2, see Getting Started with Auto Scaling.

Before you can create your Auto Scaling group in a VPC, you must first configure your VPC environment. You create your VPC by specifying a range of IP addresses in the classless
inter-domain routing (CIDR) range of your choice (for example, 10.0.0.0/16). For more information about CIDR notation and what "/16" means, go to Classless Inter-Domain Routing on
Wikipedia.

You can create a VPC that spans multiple Availability Zones then add one or more subnets in each Availability Zone. A subnet in Amazon VPC is a subdivision within an Availability
Zone defined by a segment of the IP address range of the VPC. Using subnets, you can group your instances based on your security and operational needs. A subnet resides entirely
within the Availability Zone it was created in. You launch Auto Scaling instances within the subnets.

To enable communication between the Internet and the instances in your subnets, you must create an Internet gateway and attach it to your VPC. An Internet gateway enables your
resources within the subnets to connect to the Internet through the Amazon EC2 network edge. If a subnet's traffic is routed to an Internet gateway, the subnet is known as a public
subnet. If a subnet's traffic is not routed to an Internet gateway, the subnet is known as a private subnet. Use a public subnet for resources that must be connected to the Internet,
and a private subnet for resources that need not be connected to the Internet.


Related Questions

Question : A user has created an S bucket which is not publicly accessible. The bucket is having thirty objects which are also private. If the user wants to
make the objects public, how can he configure this with minimal efforts?
 : A user has created an S bucket which is not publicly accessible. The bucket is having thirty objects which are also private. If the user wants to
1. The user should select all objects from the console and apply a single policy to mark them public
2. The user can write a program which programmatically makes all objects public using S3 SDK
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4. Make the bucket ACL as public so it will also mark all objects as public




Question : A sys admin is maintaining an application on AWS. The application is installed on EC and user has configured ELB and Auto Scaling.
Considering future load increase, the user is planning to launch new servers proactively so that they get registered with ELB. How can the user
add these instances with Auto Scaling?

 : A sys admin is maintaining an application on AWS. The application is installed on EC and user has configured ELB and Auto Scaling.
1. Increase the desired capacity of the Auto Scaling group
2. Increase the maximum limit of the Auto Scaling group
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4. Decrease the minimum limit of the Auto Scaling grou


Question : Your company plans to host a large donation website on Amazon Web Services (AWS). You anticipate a large and undetermined amount of traffic that will create many
database writes. To be certain that you do not drop any writes to a database hosted on AWS. Which service should you use?

 : Your company plans to host a large donation website on Amazon Web Services (AWS). You anticipate a large and undetermined amount of traffic that will create many
1. Amazon RDS with provisioned IOPS up to the anticipated peak write throughput.
2. Amazon Simple Queue Service (SQS) for capturing the writes and draining the queue to write to the database.
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4. Amazon DynamoDB with provisioned write throughput up to the anticipated peak write throughput.


Question : A user has setup connection draining with ELB to allow in-flight requests to continue while the instance is being deregistered through Auto Scaling.
If the user has not specified the draining time, how long will ELB allow inflight requests traffic to continue?
 : A user has setup connection draining with ELB to allow in-flight requests to continue while the instance is being deregistered through Auto Scaling.
1. 600 seconds
2. 3600 seconds
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4. 0 seconds


Question : Company B is launching a new game app for mobile devices. Users will log into the game using their existing social media account to streamline data capture. Company B
would like to directly save player data and scoring information from the mobile app to a DynamoDB table named Score Data. When a user saves their game the progress data will be
stored to the Game state S3 bucket. what is the best approach for storing data to DynamoDB and S3?


 : Company B is launching a new game app for mobile devices. Users will log into the game using their existing social media account to streamline data capture. Company B
1. Use an EC2 Instance that is launched with an EC2 role providing access to the Score Data DynamoDB table and the GameState S3 bucket that communicates with the
mobile app via web services.
2. Use temporary security credentials that assume a role providing access to the Score Data DynamoDB table and the Game State S3 bucket using web identity federation.
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bucket.
4. Use an IAM user with access credentials assigned a role providing access to the Score Data DynamoDB table and the Game State S3 bucket for distribution with the
mobile app.



Question : A newspaper organization has a on-premises application which allows the public to search its back catalogue and retrieve individual newspaper pages via a website
written in Java . They have scanned the old newspapers into JPEGs (approx 17TB) and used Optical Character Recognition (OCR) to populate a commercial search product. The hosting
platform and software are now end of life and the organization wants to migrate Its archive to AWS and produce a cost efficient architecture and still be designed for availability
and durability Which is the most appropriate?

 : A newspaper organization has a on-premises application which allows the public to search its back catalogue and retrieve individual newspaper pages via a website
1. Use S3 with reduced redundancy to store and serve the scanned files, install the commercial search application on EC2 Instances and configure with auto-scaling and
an Elastic Load Balancer.
2. Model the environment using CloudFormation use an EC2 instance running Apache webserver and an open source search application, stripe multiple standard EBS volumes
together to store the JPEGs and search index.
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multiple availability zones.
4. Use a single-AZ RDS MySQL instance lo store the search index 33d the JPEG images use an EC2 instance to serve the website and translate user queries into SQL.

5. Use a CloudFront download distribution to serve the JPEGs to the end users and Install the current commercial search product, along with a Java Container Tor the
website on EC2 instances and use Route53 with DNS round-robin.