Extinction Agenda Book 4 Chapter 2

52問 • 1年前

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A financial services company has to retain the activity logs for each of their customers to meet compliance guidelines. Depending on the business line, the company wants to retain the logs for 5-10 years in highly available and durable storage on AWS. The overall data size is expected to be in Petabytes. In case of an audit, the data would need to be accessible within a timeframe of up to 48 hours. Which AWS storage option is the MOST cost-effective for the given compliance requirements?

Amazon S3 Glacier Deep Archive

A media company wants to get out of the business of owning and maintaining its own IT infrastructure. As part of this digital transformation, the media company wants to archive about 5 petabytes of data in its on-premises data center to durable long term storage. As a solutions architect, what is your recommendation to migrate this data in the MOST cost-optimal way?

Transfer the on-premises data into multiple AWS Snowball Edge Storage Optimized devices. Copy the AWS Snowball Edge data into Amazon S3 and create a lifecycle policy to transition the data into Amazon S3 Glacier

A medium-sized business has a taxi dispatch application deployed on an Amazon EC2 instance. Because of an unknown bug, the application causes the instance to freeze regularly. Then, the instance has to be manually restarted via the AWS management console. Which of the following is the MOST cost-optimal and resource-efficient way to implement an automated solution until a permanent fix is delivered by the development team?

Setup an Amazon CloudWatch alarm to monitor the health status of the instance. In case of an Instance Health Check failure, an EC2 Reboot CloudWatch Alarm Action can be used to reboot the instance

A software engineering intern at a company is documenting the features offered by Amazon EC2 Spot instances and Spot fleets. Can you help the intern by selecting the correct options that identify the key characteristics of these two types of Spot entities? (Select two)

A Spot fleet can consist of a set of Spot Instances and optionally On-Demand Instances that are launched to meet your target capacity, Spot instances are spare Amazon EC2 capacity that can save you up 90% off of On-Demand prices. Spot instances can be interrupted by Amazon EC2 for capacity requirements with a 2-minute notification

You are deploying a critical monolith application that must be deployed on a single web server, as it hasn't been created to work in distributed mode. Still, you want to make sure your setup can automatically recover from the failure of an Availability Zone (AZ). Which of the following options should be combined to form the MOST cost-efficient solution? (Select three)

Create an auto-scaling group that spans across 2 Availability Zones, which min=1, max=1, desired=1, Create an elastic IP address (EIP) and use the Amazon EC2 user-data script to attach it, Assign an Amazon EC2 Instance Role to perform the necessary API calls

The development team at a company manages a Python based nightly process with a runtime of 30 minutes. The process can withstand any interruptions in its execution and start over again. The process currently runs on the on-premises infrastructure and it needs to be migrated to AWS. Which of the following options do you recommend as the MOST cost-effective solution?

Run on a Spot Instance with a persistent request type

Your e-commerce application is using an Amazon RDS PostgreSQL database and an analytics workload also runs on the same database. When the analytics workload is run, your e-commerce application slows down which further affects your sales. Which of the following is the MOST cost-optimal solution to fix this issue?

Create a Read Replica in the same Region as the Master database and point the analytics workload there

The data engineering team at a company wants to analyze Amazon S3 storage access patterns to decide when to transition the right data to the right storage class. Which of the following represents a correct option regarding the capabilities of Amazon S3 Analytics storage class analysis?

Storage class analysis only provides recommendations for Standard to Standard IA classes

The engineering team at a social media company has noticed that while some of the images stored in Amazon S3 are frequently accessed, others sit idle for a considerable span of time. As a solutions architect, what is your recommendation to build the MOST cost-effective solution?

Store the images using the Amazon S3 Intelligent-Tiering storage class

A big data analytics company is looking to archive the on-premises data into a POSIX compliant file storage system on AWS Cloud. The archived data would be accessed for just about a week in a year. As a solutions architect, which of the following AWS services would you recommend as the MOST cost-optimal solution?

Amazon EFS Infrequent Access

Your company has created a data warehouse using Amazon Redshift that is used to analyze data from Amazon S3. From the usage pattern, you have detected that after 30 days, the data is rarely queried in Amazon Redshift and it's not "hot data" anymore. You would like to preserve the SQL querying capability on your data and get the queries started immediately. Also, you want to adopt a pricing model that allows you to save the maximum amount of cost on Amazon Redshift. What do you recommend? (Select two)

Move the data to Amazon S3 Standard IA after 30 days, Analyze the cold data with Amazon Athena

You have deployed a database technology that has a synchronous replication mode to survive disasters in data centers. The database is therefore deployed on two Amazon EC2 instances in two Availability Zones (AZs). The database must be publicly available so you have deployed the Amazon EC2 instances in public subnets. The replication protocol currently uses the Amazon EC2 public IP addresses. What can you do to decrease the replication cost?

Use the Amazon EC2 instances private IP for the replication

A Hollywood production studio is looking at transferring their existing digital media assets of around 20 petabytes to AWS Cloud in the shortest possible timeframe. Which of the following is an optimal solution for this requirement, given that the studio's data centers are located at a remote location?

AWS Snowmobile

You are reviewing Change Control requests and note a change designed to reduce wasted CPU cycles by increasing the value of the VisibilityTimeout attribute. What does this mean?

When a consumer instance retrieves a message, that message will be hidden from other consumer instances for a fixed period of time.

How many hours of EC2 compute are provided in the free tier?

750

Which one of the following scenarios would result in a higher percentage of savings when using S3 Standard Infrequent Access storage instead of S3 Standard storage?

1 TB monthly with 10% of content accessed per month

What AWS tool can be used to estimate the cost of storage for an AWS solution?

AWS Pricing Calculator

Your application uploads several thousands of files every day. The file sizes range from 500MB to 2GB. Each file is then processed to extract metadata, and the metadata processing takes a few seconds. There is no fixed uploading frequency; sometimes all the files are uploaded at a particular hour, sometimes only a few files are uploaded at a particular hour, and sometimes no uploads occur for a few hours. What is the most cost-effective way of handling this issue?

Store the files in Amazon S3 and then use an S3 event notification to invoke a Lambda function for extracting the metadata.

You have a fleet of EC2 instances hosting your application, running in an on-demand model that is billed on an hourly basis. For running your application, you have enabled Auto Scaling for scaling up and down, as per the workload, and while reviewing the Auto Scaling events you notice that the application is scaling up and down multiple times within the same hour. What would you do to optimize the cost while preserving elasticity at the same time? (Choose two.)

Change the CloudWatch alarm period that triggers the Auto Scaling scale-down policy., Change the Auto Scaling group’s cool-down time.

What important action may help to reduce costs of AWS operations over a long period of time?

Keep up to date with new AWS service releases

You are creating a data lake, and one of the criteria you are looking for is faster performance. You want the ability to transform the data directly during the ingestion process to save time and cost. Which AWS service should you choose for this?

Use Kinesis Analytics for transforming the data.

When storing data in EC2 instances, in addition to storage space requirements, what cost factor must be considered?

Data transfer costs (from AWS to your local network)

You monitor your usage in AWS to increase or decrease resources based on current business requirements. This careful monitoring and response is taken to reduce costs. What model is being implemented according to the AWS Cost Optimization Pillar?

Consumption Model

You are in the process of designing a document archive solution for your company. The solution must be cost-effective; therefore, you have selected Glacier. The business wants to have the capability to get a document within 15 minutes of requesting it. Which feature of Amazon Glacier will you choose?

Expedited retrieval

You want to implement a multi-account AWS cloud deployment that more easily complies with business policies during implementation. You wish to implement guardrails that prevent users from taking specific actions that might breech security policies. What AWS service can provide this and works with organizations as well?

AWS Control Tower

What is the maximum VisibilityTimeout value of an SQS message in a FIFO queue?

12 hours

Following advice from your consultant, you have configured your VPC to use Dedicated hosting tenancy. A subsequent change to your application has rendered the performance gains from Dedicated tenancy superfluous, and you would now like to recoup some of these greater costs. How do you revert to Default hosting tenancy? (Choose two.)

Change tenancy using CLI/SDK., Create AMIs of all your instances. Create a new VPC with Default as the hosting tenancy attribute and then use them to create new instances using Default tenancy.

What solution is the least expensive, within AWS, for long-term data storage and archives?

Glacier

You want to implement an Oracle database in AWS. What managed service in AWS allows you to do this in the least expensive way?

RDS

How much data can be downloaded from an S3 bucket to your local network with no transfer charges?

Up to 1 GB/Month

You work for a genomics company that is developing a cure for motor neuron disease by using advanced gene therapies. As a part of its research, the company takes extremely large data sets (usually in the terabytes) and analyzes them using Elastic Map Reduce (EMR). In order to keep costs low, the company runs the analysis for only a few hours in the early hours of the morning, using spot instances for the task nodes. The core nodes are on-demand instances. Lately, however, the EMR jobs have been failing. This is due to spot instances being unexpectedly terminated. Which of the following remedies would both keep costs manageable and mitigate the issues caused by terminated spot instances? (Choose two.)

Increase the bid price for the task nodes so that you have a greater threshold before the task nodes are terminated., Change the task nodes to on-demand instances.

Your AWS environment contains several on-demand EC2 instances dedicated to a project that has just been cancelled. Your supervisor does not want to incur charges for these on-demand instances, but also does not want to lose the data just yet because there is a chance the project may be revived in the next few days. What should you do to minimize charges for these instances in the meantime?

Stop the instances.

You have a web-based application that requires access to a flat-file database (text in CSV format). What is the best storage solution for this data without conversion?

In addition to database instance class and redundancy options (such as Multi-AZ configurations), what has the most significant impact on the direct cost for RDS databases?

The database engine in use

Scenario: You are using large-scale databases and intensive processing EC2 instances. If you know the amount of resources required for one year or more for an AWS EC2 instance or RDS database, what can be utilized to reduce costs by 40% or more?

Reserved pricing

Your company has hired a young and enthusiastic accountant. After reviewing the AWS documentation and usage graphs, he announces that you are wasting vast amounts of the company’s money running servers for a full hour instead of spinning them up only when they are needed and down again as soon as they are idle for 1 minute. He cites the AWS claim that you only pay for what you use, and that as a senior engineer, you should be more conscious of wasting company money. How do you respond?

You thank him for his concern and then implement EC2’s pay-per-minute billing to get the maximum benefit for the company.

For which of the following does the AWS Trusted Adviser service offer advice? (Choose two.)

Whether MFA is configured on the root account, Advice on security groups and what ports have unrestricted access

What EC2 instance type can be used to provide up to a 90% discount off on-demand instance prices?

Spot instance

You want to perform business analytics against a large data set (several terabytes). What AWS-managed service provides such functionality?

Redshift

You have been given control of an existing AWS environment (account). You want to ensure costs are being managed well. What tool should you run?

Trusted Advisor

You must monitor the costs associated with your AWS account. What can you use to generate an alert should the outbound traffic exceed 250 GB for an on-demand EC2 instance?

AWS Budget alerts

Although your application customarily runs at 30% usage, you have identified a recurring usage spike (greater than 90% usage) between 8 p.m. and midnight daily. What is the most cost-effective way to scale your application to meet this increased need?

Use proactive cyclic scaling to boost your capacity at a fixed interval.

You’ve been tasked with implementing a globally accessible storage solution that will scale from a few terabytes (now) to an unknown, but significantly greater, volume of data in three years’ time. You don’t want to spend a lot of money. Which AWS service would best meet your current and projected storage needs and at the same time make sure the cost is minimal?

You have been engaged as a consultant by a company that generates utility bills and publishes them online. PDF images are generated and then stored on a high-performance RDS instance. Generally, invoices are viewed by customers once per month. Recently, however, the number of customers has increased threefold, and the wait-time necessary to view invoices has increased unacceptably. The CTO is unwilling to alter the codebase more than necessary this quarter, but needs to return performance to an acceptable level before the end-of-the-month print run. Which of the following solutions would you feel comfortable proposing to the CTO and GM? (Choose two.)

Create RDS read replicas and additional web/app instances across all the available AZs., Install an ElastiCache cluster in front of the RDS installation.

What can be used to aggregate several AWS accounts for centralized management and billing tracking?

AWS Organizations

You have a small database workload with infrequent I/O. These databases are mainly used as ad hoc databases for noncritical testing purposes. Which storage medium would be the most cost-effective way to meet these requirements?

Amazon RDS Magnetic Storage

What tool is provided by AWS to compare the cost of locally-implemented solutions with AWS cloud-hosted solutions?

AWS TCO Calculator

You’ve been commissioned to develop a high-availability application with a stateless web tier. Identify the most cost-effective means of reaching this goal.

Use an Elastic Load Balancer, a multi-AZ deployment of an Auto Scaling group of EC2 Spot instances (primary) running in tandem with an Auto Scaling group of EC2 On-Demand instances (secondary), and DynamoDB.

What is the default duration of cost history shown in the Cost Explorer view of AWS?

6 months

When should you use a dedicated host for an EC2 instance?

When you require a license to be locked to the hardware

Which one of the following is not something for which AWS Trusted Advisor makes recommendations?

Scalability

Where are AWS Cost and Usage Reports stored?

S3 bucket

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critical flaw · 98問 · 2年前

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