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Understanding functional and technical aspects of Design Secure Applications and Architectures

The following will be discussed in the AMAZON AWS-SOLUTIONS-ARCHITECT-ASSOCIATE exam dumps:

• Design secure application tiers
• Design secure access to AWS resources
• Select appropriate data security options

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Amazon AWS Certified Solutions Architect - Associate (SAA-C02) Sample Questions (Q233-Q238):

NEW QUESTION # 233
______ embodies the "share-nothing" architecture and essentially involves breaking a large database into several smaller databases. Common ways to split a database include
1 ) splitting tables that are not joined in the same query onto different hosts or
2 ) duplicating a table across multiple hosts and then using a hashing algorithm to determine which host receives a given update.

• A. DOL operations
• B. $harding
• C. Fai lure recovery
• D. Federation

Answer: B
NEW QUESTION # 234
A company has more than 100 AWS accounts, with one VPC per account, that need outbound HTTPS connectivity to the internet. The current design contains one NAT gateway per Availability Zone (AZ) in each VPC. To reduce costs and obtain information about outbound traffic, management has asked for a new architecture for internet access.
Which solution will meet the current needs, and continue to grow as new accounts are provisioned, while reducing costs?

• A. Create multiple hosted-private AWS Direct Connect VIFs, one per account, each with a Direct Connect gateway. Default route internet traffic back to an on-premises router to route to the internet.
• B. Create a central VPC for outbound internet traffic. Use VPC peering to default route to a set of redundant NAT gateway in the central VPC.
• C. Create a proxy fleet in a central VPC account. Create an AWS PrivateLink endpoint service in the central VPC. Use PrivateLink interface for internet connectivity through the proxy fleet.
• D. Create a transit VPC across two AZs using a third-party routing appliance. Create a VPN connection to each VPC. Default route internet traffic to the transit VPC.

Answer: C
NEW QUESTION # 235
A company's dynamic website is hosted using on-premises servers in the United States. The company is launching its product in Europe, and it wants to optimize site loading times for new European users. The site's backend must remain in the United States. The product is being launched in a few days, and an immediate solution is needed.
What should the solutions architect recommend?

• A. Move the website to Amazon S3. Use cross-Region replication between Regions.
• B. Launch an Amazon EC2 instance in us-east-1 and migrate the site to it.
• C. Use Amazon CloudFront with a custom origin pointing to the on-premises servers.
• D. Use an Amazon Route 53 geo-proximity routing policy pointing to on-premises servers.

Answer: C Explanation:
Explanation
https://aws.amazon.com/pt/blogs/aws/amazon-cloudfront-support-for-custom-origins/ You can now create a CloudFront distribution using a custom origin. Each distribution will can point to an S3 or to a custom origin. This could be another storage service, or it could be something more interesting and more dynamic, such as an EC2 instance or even an Elastic Load Balancer
NEW QUESTION # 236
Refer to the architecture diagram above of a batch processing solution using Simple Queue Service (SQS) to set up a message queue between EC2 instances which are used as batch processors Cloud Watch monitors the number of Job requests (queued messages) and an Auto Scaling group adds or deletes batch servers automatically based on parameters set in Cloud Watch alarms. You can use this architecture to implement which of the following features in a cost effective and efficient manner?

• A. Implement fault tolerance against EC2 instance failure since messages would remain in SQS and worn can continue with recovery of EC2 instances implement fault tolerance against SQS failure by backing up messages to 53.
• B. Coordinate number of EC2 instances with number of job requests automatically thus Improving cost effectiveness.
• C. Implement message passing between EC2 instances within a batch by exchanging messages through SQS.
• D. Handle high priority jobs before lower priority jobs by assigning a priority metadata fie ld to SQS messages.
• E. Reduce the overall lime for executing jobs through parallel processing by allowing a busy EC2 instance that receives a message to pass it to the next instance in a daisy-chain setup.

Answer: B Explanation:
Reference:
There are cases where a large number of batch jobs may need processing, and where the jobs may need to be re-prioritized.
For example, one such case is one where there are differences between different levels of services for unpaid users versus subscriber users (such as the time until publication) in services enabling, for example, presentation fi les to be uploaded for publication from a web browser. When the user uploads a presentation file, the conversion processes, for example, for publication are performed as batch processes on the system side, and the file is published after the conversion. Is it then necessary to be able to assign the level of priority to the batch processes for each type of subscriber.
Explanation of the Cloud Solution/Pattern
A queue is used in controlling batch jobs. The queue need only be provided with priority numbers.
Job requests are controlled by the queue, and the job requests in the queue are processed by a batch server. In Cloud computing, a highly reliable queue is provided as a service, which you can use to structure a highly reliable batch system with ease. You may prepare multiple queues depending on priority levels, with job requests put into the queues depending on their priority levels, to apply prioritization to batch processes. The performance (number) of batch servers corresponding to a queue must be in accordance with the priority level thereof.
Implementation
In AWS, the queue service is the Simple Queue Service (SQS). Multiple SQS queues may be prepared to prepare queues for individual priority levels (with a priority queue and a secondary queue).
Moreover, you may also use the message Delayed Send function to delay process execution.
Use SQS to prepare multiple queues for the individual priority levels.
Place those processes to be executed immediately (job requests) in the high priority queue.
Prepare numbers of batch servers, for processing the job requests of the queues, depending on the priority levels.
Queues have a message "Delayed Send" function. You can use this to delay the time for starting a process.
Configuration

Benefits
You can increase or decrease the number of servers for processing jobs to change automatically the processing speeds of the priority queues and secondary queues.
You can handle performance and service requirements through merely increasing or decreasing the number of EC2 instances used in job processing.
Even if an EC2 were to fail, the messages (jobs) would remain in the queue service, enabling processing to be continued immediately upon recovery of the EC2 instance, producing a system that is robust to failure.
Cautions
Depending on the balance between the number of EC2 instances for performing the processes and the number of messages that are queued, there may be cases where processing in the secondary queue may be completed first, so you need to monitor the processing speeds in the primary queue and the secondary queue.
NEW QUESTION # 237
You are tasked with moving a legacy application from a virtual machine running Inside your datacenter to an Amazon VPC Unfortunately this app requires access to a number of on-premises services and no one who configured the app still works for your company. Even worse there's no documentation for it. What will allow the application running inside the VPC to reach back and access its internal dependencies without being reconfigured? (Choose 3 answers)

• A. An Elastic IP address on the VPC instance
• B. An AWS Direct Connect link between the VPC and the network housing the internal services.
• C. An Internet Gateway to allow a VPN connection.
• D. An IP address space that does not conflict with the one on-premises
• E. Entries in Amazon Route 53 that allow the Instance to resolve its dependencies' IP addresses
• F. A VM Import of the current virtual machine

Answer: B,D,F
NEW QUESTION # 238
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