SOA-C01 : AWS-SysOps ​​​​​: Part 20

SOA-C01 : AWS-SysOps ​​​​​: Part 20

1. What does Amazon RDS stand for?

   • Amazon Regional Data Server
   • Amazon Regional Database Service
   • Amazon Relative Data Service
   • Amazon Relational Database Service
   Explanation:
   Amazon RDS stands for Relational Database Service, which offers easy to scale and manage rela-tional databases on the Cloud.
   It provides cost-efficient and resizable capacity while managing time-consuming database admin-istration tasks, freeing you up to focus on your applications and business. Amazon RDS provides you six familiar database engines to choose from, including Amazon Aurora, PostgreSQL, MySQL, MariaDB, Oracle, and Microsoft SQL Server.

2. What does Amazon SES provide?

   • A managed Email Server
   • A scalable anti-spam service
   • A scalable email sending and receiving service
   • A managed drag-and-drop interface with the AWS CloudFormation Designer
   Explanation:
   Amazon SES or Simple Email Service offers a transactional and highly scalable email service.
   Amazon SES is an email platform that provides an easy, cost-effective way for you to send and re-ceive email using your own email addresses and domains. For example, you can send marketing emails such as special offers, transactional emails such as order confirmations, and other types of correspondence such as newsletters. When you use Amazon SES to receive mail, you can develop software solutions such as email auto responders, email unsubscribe systems, and applications that generate customer support tickets from incoming emails.

3. Pricing is ____ consumed for EC2 instances.

   • per instance-hour only
   • per instance-minute or instance-hour
   • per instance-second or per instance-hour
   • per instance-minute only
   Explanation:
   In AWS, you pay only for what you use.
   EC2 pricing is per instance-second consumed, or per instance-hour consumed depending on the in-stance type and operating system for the AMI. For example, spot instances, reserved instances and on-demand instances are billed per-second, while Dedicated instances are billed per hour.
   Linux instances can be billed per second, but Microsoft Windows instances are billed per hour.

4. What does Amazon SES stand for?

   • Simple Elastic Server
   • Software Email Solution
   • Software Enabled Server
   • Simple Email Service
   Explanation:
   Amazon SES stands for Simple Email Service.
   Amazon SES is an email platform that provides an easy, cost-effective way for you to send and re-ceive email using your own email addresses and domains. For example, you can send marketing emails such as special offers, transactional emails such as order confirmations, and other types of correspondence such as newsletters. When you use Amazon SES to receive mail, you can develop software solutions such as email autoresponders, email unsubscribe systems, and applications that generate customer support tickets from incoming emails.

5. What is a “vault” in Amazon Glacier?

   • A unique ID that maps an AWS Region, plus a specific Amazon S3 bucket
   • A way to group archives together in Amazon Glacier
   • A container for storing S3 buckets
   • A free tier available for 12 months following your AWS sign-up date
   Explanation:
   An Amazon Glacier vault is a container in which you can organize and manage your archives.
   You store data in Amazon Glacier as an archive. Each archive is assigned a unique archive ID that can later be used to retrieve the data. An archive can represent a single file or you may choose to combine several files to be uploaded as a single archive. You upload archives into vaults. Vaults are collections of archives that you use to organize your data.

6. A user has launched five instances and have registered them with an ELB. How can the user add the sixth EC2 instance to the ELB?

   • The user must stop the ELB and add the sixth instance.
   • The user can add the sixth instance on the fly through API, CLI or the AWS Management Con-sole.
   • The user can add the instance and change the ELB config file.
   • The ELB can only have a maximum of five instances.
   Explanation:
   Elastic Load Balancing automatically distributes incoming traffic across multiple EC2 instances.
   You create a load balancer and register instances with the load balancer in one or more Availability Zones. The load balancer serves as a single point of contact for clients. This enables you to increase the availability of your application. You can add and remove EC2 instances from your load balancer as your needs change, without disrupting the overall flow of information.

7. Which of the following programming languages is not supported by Amazon’s Elastic Beanstalk?

   • Ruby
   • Java
   • Node.js
   • Perl
   Explanation:
   AWS Elastic Beanstalk web server environment tiers support applications developed in Java,
   PHP, .NET, Node.js, Python, and Ruby as well as different container types for each language.
   Worker environments are supported for all platforms except .NET.

8. Amazon CloudFront is a ________.

   • persistent block level storage volume
   • content delivery network service
   • fully managed desktop computing service in the cloud
   • task coordination and state management service for cloud applications
   Explanation:
   Amazon CloudFront is a content delivery network (CDN) service. It integrates with other Amazon Web Services to give developers and businesses an easy way to distribute content to end users with low latency, high data transfer speeds, and no minimum usage commitments.

9. In EC2, what happens to the data in an instance store if an instance reboots (either intentionally or unintentionally)?

   • Data is partially present in the instance store.
   • Data persists in the instance store.
   • Data is deleted from the instance store for security reasons.
   • Data in the instance store will be lost.
   Explanation:
   The data in an instance store persists only during the lifetime of its associated instance. If an in-stance reboots (intentionally or unintentionally), data in the instance store persists. However, data on instance store volumes is lost under the following circumstances.
   Failure of an underlying drive
   The instance is stopped
   Terminating an instance

10. What does Amazon EC2 provide?

    • A platform to run code (Java, PHP, Python), paying on an hourly basis
    • A physical computing environment
    • Virtual Server Hosting
    • Domain Name System (DNS)
    Explanation:
    Amazon EC2 provides Virtual Server Hosting.

11. What does RRS stand, in the context of S3 services?

    • Regional Rights Storage
    • Relational Rights Storage
    • Regional Rights Standard
    • Reduced Redundancy Storage
    Explanation:
    In Amazon S3, RRS stands for Reduced Redundancy Storage. Reduced redundancy storage stores objects on multiple devices across multiple facilities, providing 400 times the durability of a typical disk drive, but it does not replicate objects as many times as Amazon S3 standard storage. In addi-tion, reduced redundancy storage is designed to sustain the loss of data in a single facility.

12. Which choice is a storage option supported by Amazon EC2?

    • Amazon SNS store
    • Amazon Instance Store
    • Amazon AppStream store
    • None of these
    Explanation:
    Amazon EC2 supports the following storage options:
    Amazon Elastic Block Store (Amazon EBS)
    Amazon EC2 Instance Store
    Amazon Simple Storage Service (Amazon S3)

13. Amazon EC2 provides virtual computing environments known as _____.

    • instances
    • volumes
    • microsystems
    • servers

14. Which of the following services is offered by CloudWatch?

    • Fixing broken links on the client’s instances
    • Creating IAM users for all services in AWS
    • Monitoring estimated AWS charges
    • Balancing the request load between various instances
    Explanation:
    AWS CloudWatch supports monitoring of the AWS estimated usage charges. You create an Ama-zon CloudWatch alarm that will monitor your estimated Amazon Web Services (AWS) charges. When you enable the monitoring of estimated charges for your AWS account, the estimated charges are calculated and sent several times daily to CloudWatch as metric data.

15. The fastest way to load 300 TB of data to AWS is _____.

    • to directly upload all data to S3 over a dedicated 100 Mbps connection
    • to use AWS Import/Export Snowball
    • to use VM Import/Export
    • to zip all the data and then upload to S3
    Explanation:
    Even with high-speed Internet connections, it can take months to transfer large amounts of data.
    For example, 100 terabytes of data will take more than 100 days to transfer over a dedicated 100 Mbps connection. That same transfer can be accomplished in less than one day, plus shipping time, using two Snowball appliances.

16. AMIs can be ______________.

    • only private unless created by Amazon
    • created only by Amazon
    • created only for Linux instances
    • public or private
    Explanation:
    After you create an AMI, you can keep it private so that only you can use it, or you can share it with a specified list of AWS accounts. You can also make your custom AMI public so that the communi-ty can use it. Building a safe, secure, usable AMI for public consumption is a fairly straightforward process, if you follow a few simple guidelines.

17. Can you configure multiple Load Balancers with a single Auto Scaling group?

    • Yes, you can provide the ELB is configured with Amazon AppStream.
    • No
    • Yes
    • Yes, you can but only if it is configured with Amazon Redshift.
    Explanation:
    Yes, you can configure more than one load balancer with an autoscaling group. Auto Scaling inte-grates with Elastic Load Balancing to enable you to attach one or more load balancers to an existing Auto Scaling group. After you attach the load balancer, it automatically registers the instances in the group and distributes incoming traffic across the instances.

18. A user is sending custom data metrics to CloudWatch. What is the allowed time stamp granularity for each data point published for the custom metric?

    • 1 nanosecond
    • 1 millisecond
    • 1 minute
    • 1 second
    Explanation:
    The user is allowed to send data up to one-thousandth of a second. CloudWatch aggregates the data by each minute and generates a metric for that.

19. When rebalancing, Auto Scaling launches new instances before terminating the old ones, so that re-balancing does not compromise the performance or availability of your application. Because Auto Scaling attempts to launch new instances before terminating the old ones, being at or near the speci-fied maximum capacity could impede or completely halt rebalancing activities. What does Auto Scaling do in order to avoid this problem?

    • It can temporarily exceed the specified maximum capacity of a group by a 20 percent margin (or by a 2-instance margin, whichever is greater) during a rebalancing activity.
    • It can add new reserved instances you have defined.
    • It can temporarily exceed the specified maximum capacity of a group by a 10 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.
    • It can temporarily exceed the specified maximum capacity of a group by a 5 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.
    Explanation:
    When rebalancing, Auto Scaling launches new instances before terminating the old ones, so that re-balancing does not compromise the performance or availability of your application. Because Auto Scaling attempts to launch new instances before terminating the old ones, being at or near the speci-fied maximum capacity could impede or completely halt rebalancing activities. To avoid this prob-lem, the system can temporarily exceed the specified maximum capacity of a group by a 10 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.

20. What does the AWS Storage Gateway provide?

    • It provides data security features by enabling an encrypted data storage on Amazon S3.
    • It provides an encrypted SSL endpoint for backups in the cloud.
    • It provides seamless integration with data security features between your on-premises IT envi-ronment and the Amazon Web Services (AWS) storage infrastructure.
    • It provides a backup solution to on-premises Cloud storage.
    Explanation:
    AWS Storage Gateway connects an on-premises software appliance with cloud-based storage to provide seamless integration with data security features between your on-premises IT environment and the Amazon Web Services (AWS) storage infrastructure.