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k3ch - 2910116 - D3 - B

63問 • 1年前

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You are using AWS Lambda to implement a batch job for a big data analytics workflow. Based on historical trends, a similar job runs for 30 minutes on average. The AWS Lambda function pulls data from Amazon S3, processes it, and then writes the results back to Amazon S3. When you deployed your AWS Lambda function, you noticed an issue where the AWS Lambda function abruptly failed after 15 minutes of execution. As a solutions architect, which of the following would you identify as the root cause of the issue?

The AWS Lambda function is timing out

The CTO of an online home rental marketplace wants to re-engineer the caching layer of the current architecture for its relational database. The CTO wants the caching layer to have replication and archival support built into the architecture. Which of the following AWS service offers the capabilities required for the re-engineering of the caching layer?

Amazon ElastiCache for Redis

A company has noticed several provisioned throughput exceptions on its Amazon DynamoDB database due to major spikes in the writes to the database. The development team wants to decouple the application layer from the database layer and dedicate a worker process to writing the data to Amazon DynamoDB. Which middleware do you recommend on using that can scale infinitely and meet these requirements in the most cost effective way?

Amazon Simple Queue Service (Amazon SQS)

A company uses a legacy on-premises reporting application that operates on gigabytes of .json files and represents years of data. The legacy application cannot handle the growing size of .json files. New .json files are added daily from various data sources to a central on-premises storage location. The company wants to continue to support the legacy application. The company has hired you as a solutions architect to build a solution that can manage ongoing data updates from your on-premises application to Amazon S3. Which of the following solutions would you suggest to address the given requirement?

Set up an on-premises file gateway. Configure data sources to write the .json files to the file gateway. Point the legacy analytics application to the file gateway. The file gateway should replicate the .json files to Amazon S3

A Big Data consulting company runs large distributed and replicated workloads on the on-premises data center. The company now wants to move these workloads to Amazon EC2 instances by using the placement groups feature and it wants to minimize correlated hardware failures. Which of the following represents the correct placement group configuration for the given requirement?

Partition placement groups

A company manages a High Performance Computing (HPC) application that needs to be deployed on Amazon EC2 instances. The application requires high levels of inter-node communications and high network traffic between the instances. As a solutions architect, which of the following options would you recommend to the engineering team at the company? (Select two)

Deploy Amazon EC2 instances in a cluster placement group, Deploy Amazon EC2 instances with Elastic Fabric Adapter (EFA)

A development team is looking for a solution that saves development time and deployment costs for an application that uses a high-throughput request-response message pattern. Which of the following Amazon SQS queue types is the best fit to meet this requirement?

Amazon Simple Queue Service (Amazon SQS) temporary queues

The DevOps team at an e-commerce company has deployed a fleet of Amazon EC2 instances under an Auto Scaling group (ASG). The instances under the ASG span two Availability Zones (AZ) within the us-east-1 region. All the incoming requests are handled by an Application Load Balancer (ALB) that routes the requests to the Amazon EC2 instances under the Auto Scaling Group. As part of a test run, two instances (instance 1 and 2, belonging to AZ A) were manually terminated by the DevOps team causing the Availability Zones (AZ) to have unbalanced resources. Later that day, another instance (belonging to AZ B) was detected as unhealthy by the Application Load Balancer's health check. Can you identify the correct outcomes for these events? (Select two)

As the resources are unbalanced in the Availability Zones, Amazon EC2 Auto Scaling will compensate by rebalancing the Availability Zones. When rebalancing, Amazon EC2 Auto Scaling launches new instances before terminating the old ones, so that rebalancing does not compromise the performance or availability of your application, Amazon EC2 Auto Scaling creates a new scaling activity for terminating the unhealthy instance and then terminates it. Later, another scaling activity launches a new instance to replace the terminated instance

A company's real-time streaming application is running on AWS. As the data is ingested, a job runs on the data and takes 30 minutes to complete. The workload frequently experiences high latency due to large amounts of incoming data. A solutions architect needs to design a scalable and serverless solution to enhance performance. Which combination of steps should the solutions architect take? (Select two)

Set up Amazon Kinesis Data Streams to ingest the data, Set up AWS Fargate with Amazon ECS to process the data

The engineering team at a startup is evaluating the most optimal block storage volume type for the Amazon EC2 instances hosting its flagship application. The storage volume should support very low latency but it does not need to persist the data when the instance terminates. As a solutions architect, you have proposed using Instance Store volumes to meet these requirements. Which of the following would you identify as the key characteristics of the Instance Store volumes? (Select two)

If you create an Amazon Machine Image (AMI) from an instance, the data on its instance store volumes isn't preserved, You can't detach an instance store volume from one instance and attach it to a different instance

A Big Data company wants to optimize its daily Extract-Transform-Load (ETL) process that migrates and transforms data from its Amazon S3 based data lake to an Amazon Redshift cluster. The team wants to manage this daily job in a serverless environment. Which AWS service is the best fit to manage this process without the need to configure or manage the underlying compute resources?

AWS Glue

You are looking to build an index of your files in Amazon S3, using Amazon RDS PostgreSQL. To build this index, it is necessary to read the first 250 bytes of each object in Amazon S3, which contains some metadata about the content of the file itself. There are over 100,000 files in your S3 bucket, amounting to 50 terabytes of data. How can you build this index efficiently?

Create an application that will traverse the S3 bucket, issue a Byte Range Fetch for the first 250 bytes, and store that information in Amazon RDS

The systems administrator at a company wants to set up a highly available architecture for a bastion host solution. As a solutions architect, which of the following options would you recommend as the solution?

Create a public Network Load Balancer that links to Amazon EC2 instances that are bastion hosts managed by an Auto Scaling Group

As a Solutions Architect, you have set up a database on a single Amazon EC2 instance that has an Amazon EBS volume of type gp2. You currently have 300 gigabytes of space on the gp2 device. The Amazon EC2 instance is of type m5.large. The database performance has recently been poor and upon looking at Amazon CloudWatch, you realize the IOPS on the Amazon EBS volume is maxing out. The disk size of the database must not change because of a licensing issue. How do you troubleshoot this issue?

Convert the gp2 volume to an io1

An engineering team wants to orchestrate multiple Amazon ECS task types running on Amazon EC2 instances that are part of the Amazon ECS cluster. The output and state data for all tasks need to be stored. The amount of data output by each task is approximately 20 megabytes and there could be hundreds of tasks running at a time. As old outputs are archived, the storage size is not expected to exceed 1 terabyte. As a solutions architect, which of the following would you recommend as an optimized solution for high-frequency reading and writing?

Use Amazon EFS with Provisioned Throughput mode

Your company is generating a huge volume of data sets with billions of rows that must be summarized by column. You are going to use Tableau on top of these data sets to build daily and weekly reports. Which AWS service should you use to meet these requirements?

Amazon Redshift

Amazon Web Services (AWS) offers four different levels of support. Which of the following are valid support levels? (Choose three.)

Business, Enterprise, Developer

What is the primary difference between durability and availability as it related to AWS storage?

Availability is related to accessing the data at a point in time and durability is related to the existence of the data whether accessible or not

What two methods are provided in AWS RDS for database backups?

Automated backups and automated snapshots

What can be implemented to prevent traffic from the network to your EC2 instance from impacting the performance of traffic between your EC2 instance and an attached EBS volume?

Implement EBS-optimized instances

You’re building out a single-region application in us-west-2. However, disaster recovery is a strong consideration, and you need to build the application so that if us-west-2 becomes unavailable, you can fail over to us-west-1. Your application relies exclusively on pre-built AMIs. In order to share those AMIs with the region you’re using as a backup, which process would you follow?

Copy the AMI from us-west-2, manually apply launch permissions, user-defined tags, and Amazon S3 bucket permissions of the default AMI to the new instance, and launch the instance.

What is the container used to store DNS records called in Route 53?

Hosted zone

What AWS service can be used to monitor your EC2 instances and provide a dashboard for performance management?

CloudWatch

What kind of storage is defined as data storage that persists only during the lifetime of an associated instance and that is lost when a drive fails, an instance stops, or an instance is terminated?

Instance store

You must attach an EBS volume to an EC2 instance that offers the highest level of performance. What EBS type should be used?

Provisioned IOPS SSD

Your company likes the idea of storing files on AWS. However, low-latency service of the majority of files is important to customer service. Which Storage Gateway configuration would you use to achieve both these ends?

Gateway-Stored

You must backup an EBS volume as quickly as possible and perform this backup once each day. What is the best method provided within AWS to perform this backup?

Snapshots

You have a MySQL database running on an EC2 instance in a private subnet. You can connect via SSH, but you are unable to apply updates to the database server via the NAT instance. What might you do to remedy this problem?

Ensure that “Source/Destination Checks” is disabled on the NAT instance.

You must transfer 40 TB of data into AWS S3 buckets. You are concerned about the time it will take to transfer the files over the network and the impact it will have on user performance. What is the best option for transferring such a large amount of data without impacting network user performance?

Snowball

You manage a Ruby on Rails application that lives on a cluster of EC2 instances. Your website occasionally experiences brief, strong, and entirely unpredictable spikes in traffic that overwhelm your EC2 instances’ resources and freeze the application. As a result, you’re losing recently submitted requests from end users. You use Auto Scaling to deploy additional resources to handle the load during spikes, but the new instances don’t spin up fast enough to prevent the existing application servers from freezing. Which of the following actions will provide the most cost-effective solution in preventing the loss of recently submitted requests?

Use Amazon SQS to decouple the application components and keep the requests in queue until the extra Auto Scaling instances are available.

You must implement an AWS solution that can expand and contract the number of server instances as needed. What AWS service provides this functionality?

Auto Scaling

What is likely to occur during the time required to take a snapshot of a Cold HDD or Throughput-Optimized HDD EBS volume?

Performance will be degraded

You must plan a Route 53 deployment in AWS. What routing policy is used to send all traffic to a single resource?

Simple routing

Which one of the following resources cannot be automatically scaled with AWS Auto Scaling?

Microsoft SQL Server RDS databases

To how many maximum elements can a single EC2 instance be attached?

What is the minimum volume size of a Provisioned IOPS SSD EBS volume?

4 GiB

You have been monitoring a sensitive Auto Scaling group, and you expect it to scale in as you enter a period of downtime over the holiday. The Auto Scaling group is distributed over three AZs (AZ -A and AZ -B have two instances each, and AZ -C has three instances). All instances have different CPU and memory utilization levels and have been running for a different number of days. All instances come from different versions of a root AMI and have different numbers of sessions connected. Which instance will be the first to shut down?

The instance in AZ -C that has the oldest launch configuration will terminate first.

You work for a large software company in Seattle. The company has its production environment provisioned on AWS inside a custom VPC. The VPC contains both a public subnet and a private subnet. The company tests its applications on custom EC2 instances inside a private subnet. There are approximately 500 instances, and they communicate to the outside world via a proxy server. At 3 A.M. every night, the EC2 instances pull down OS updates, which are usually 150MB or so. They then apply these updates and reboot; however, if the software has not downloaded within half an hour, the update will attempt to download the following day. You notice that a number of EC2 instances are continually failing to download the updates in the allotted time. Which of the following answers might explain this failure? (Choose two.)

The proxy server is on an inadequately sized EC2 instance and does not have sufficient network throughput to handle all updates simultaneously. You should increase the instance size of the EC2 instance for the proxy server., The proxy server is in a private subnet and uses a NAT gateway instance to connect to the Internet. However, this instance is too small to handle the required network traffic. You should re-provision the NAT gateway instance so that it’s able to handle the throughput.

You have five elastic IP addresses in a region. How many more can you create within that region without contacting support to request more?

What can be configured to optimize EFS performance in relation to NFS mount options?

Use NFSv4.1

You have provisioned a custom VPC with a subnet that has a CIDR block address range of 10.0.3.0/28. Inside this subnet, you have two web servers, two application servers, two database servers, and a NAT. You have configured an Auto Scaling group on the two web servers to automatically scale when the CPU utilization goes above 90%. Several days later, you notice that Auto Scaling is no longer deploying new instances into the subnet, despite the CPU utilization of all web servers being at 100%. Which of the following answers may offer an explanation? (Choose two.)

AWS reserves both the first four and the last IP address in each subnet’s CIDR block., Your Auto Scaling group (ASG) has provisioned too many EC2 instances and has exhausted the number of internal IP addresses available in the subnet.

When policies can be written in a language in AWS, what language is most often used?

JSON

You work for a games development company that is re-architecting its production environment. The company has decided to make all web servers stateless. Which of the following AWS services will help the company achieve this goal? (Choose three.)

RDS, ElastiCache, DynamoDB

You have implemented a read replica instance for a MySQL database. What should you communicate to the users in relation to how they will access the read replica?

Read replicas are accessed the same as any other database in RDS

You must attach an EBS volume to an EC2 instance that offers 500 GiB of storage at the lowest cost. What EBS type should be used?

Cold HDD

You have been engaged by a company to design and lead a migration to an AWS environment. The team is concerned about the capabilities of the new environment, especially when it comes to avoiding all bottlenecks. The design calls for about 20 instances (C3.2xLarge) pulling jobs/messages from SQS. Network traffic per instance is estimated to be around 500Mbps at the beginning and end of each job. Which network configuration should you plan on deploying?

Spread the instances over multiple AZs to minimize the traffic concentration and maximize the fault tolerance.

Which file sizes generally provide for faster access per megabyte when using EFS and why?

Large file sizes because the time to access the file location is the same regardless of file size

When implementing ELB, what should you ensure such that high availability is achieved?

Resources are in multiple Availability Zones

You are creating a data lake in AWS, and one of the use cases for the data lake is batch jobs. Which AWS service would you use to ingest the data for batch jobs?

Kinesis Firehose

Which one of the following RDS database types does not support read replicas?

Aurora

What can you monitor to see if a T2 database instance should be upgraded to an R3 instance?

CPU credits

When does Amazon recommend using the db.t2.small and db.t2.medium database instances with the Aurora database service?

For development and test servers

You have been asked by your employer to create an identical copy of your production environment in another region for disaster recovery purposes. Which of the following AWS resources would you NOT need to re-create because they are available universally across the console? (Choose two.)

Route 53, Identity Access Management roles

What two caching engines are supported by ElastiCache?

Redis and memcached

You receive a ProvisionedThroughputExceededException error. However, the DynamoDB metrics show that your table or index has not been operating at maximum provisioned throughput. What could this error be caused by?

The throughput is not balanced across your partitions. One partition is being subjected to a disproportionate amount of the traffic and is therefore exceeding the limits.

You are working with AWS AMIs. What kind of AMI should be used when you want to customize an image and then reuse it to scale up a deployment?

Private AMI

When should RDS backups occur for best performance results?

During times of normally low write IOPS

You are running a Mongo database that requires access to tens of thousands of low-latency IOPS. Which of the following EC2 instance families would best suit your needs?

High I/O instances

In addition to the proper configuration of RDS database settings, what can be done to improve overall performance of database operations?

Tune SQL queries

You are running a media-rich website with a global audience in US-EAST-1 for a customer in the publishing industry. The website updates every 20 minutes. The web-tier of the site sits on three EC2 instances inside an Auto Scaling group. The Auto Scaling group is configured to scale when CPU utilization of the instances is greater than 70%. The Auto Scaling group sits behind an Elastic Load Balancer, and your static content lives in S3 and is distributed globally by CloudFront. Your RDS database is an db.m5.4xlarge instance. CloudWatch metrics show that your RDS instance usually has around 2GB of memory free, and an average CPU utilization of 75%. Currently, it is taking your users in Japan and Australia approximately 3 to 5 seconds to load your website, and you have been asked to help reduce these load times. How might you improve your page load times? (Choose three.)

Set up a read replica of your production environment in the Asia Pacific region and configure latency-based routing on Route 53., Use ElastiCache to cache the most commonly accessed DB queries., Set up CloudFront with dynamic content support to enable the caching of reusable content from the media-rich website.

You are implementing an ELB solution. You want to ensure high availability. Where should the resources to which ELB directs be located?

In different Availability Zones

What should be implemented when microsecond response time is required of a DynamoDB implementation?

DAX

You have been asked to implement a read replica RDS setup. What is the primary purpose of such a configuration?

Performance

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critical flaw · 98問 · 2年前

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