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AWS EC2 and AMI Creation Overview
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AWS EC2 and AMI Creation Overview

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@BeauteousGalaxy7114

Questions and Answers

Which command initiates the process to launch an EC2 instance using the AWS CLI?

  • aws ec2 run-instances (correct)
  • aws iam create-user
  • aws ec2 describe-instances
  • aws s3 create-bucket

    • What does the 'image-id' parameter represent in the EC2 launch command?

  • Specifies the AWS region to deploy the instance
  • Indicates the security groups for instance permissions
  • The type of instance to be created
  • The unique identifier for an Amazon Machine Image (AMI) (correct)

    • In the command 'aws ec2 run-instances --count 1', what does the 'count' parameter signify?

  • The size of the instance being launched
  • The number of AMIs to be retrieved
  • The number of security groups associated with the instance
  • The total number of instances to launch (correct)

    • Which of the following parameters is NOT required to run an EC2 instance using the AWS CLI?

    <p>--region</p> Signup and view all the answers

    What role does the 'key-name' parameter play in the EC2 launch command?

    <p>It identifies the SSH key pair for accessing the instance</p> Signup and view all the answers

    What does the 'security-groups' parameter define in the AWS CLI command?

    <p>The permissions and access controls for the instance</p> Signup and view all the answers

    How can an EC2 instance be launched programmatically besides using the AWS Command Line Interface?

    <p>Via AWS software development kits (SDKs)</p> Signup and view all the answers

    Which component must be present before using the AWS CLI command to launch an EC2 instance?

    <p>Existing key pair and security group</p> Signup and view all the answers

    What does AMI stand for?

    <p>Amazon Machine Image</p> Signup and view all the answers

    Which of the following steps is NOT involved in creating an AMI from an EC2 instance?

    <p>Modifying the instance settings</p> Signup and view all the answers

    Which option is available when launching an EC2 instance from an AMI?

    <p>Using Quick Start AMIs provided by AWS</p> Signup and view all the answers

    What is a 'golden instance' in the context of EC2?

    <p>An instance that is pre-configured with desired settings</p> Signup and view all the answers

    What happens to the EC2 instance during the AMI creation process?

    <p>The instance is stopped temporarily</p> Signup and view all the answers

    What aspect does the selected instance type NOT affect?

    <p>Processor architecture</p> Signup and view all the answers

    Why might you want to copy an AMI to other Regions?

    <p>To launch EC2 instances in those locations</p> Signup and view all the answers

    Which of the following is NOT an instance type category?

    <p>Storage only</p> Signup and view all the answers

    What two components make up a key pair in AWS EC2?

    <p>Public key and private key file</p> Signup and view all the answers

    What is the purpose of the private key in a key pair?

    <p>To obtain the administrator password for Windows AMIs</p> Signup and view all the answers

    What happens after you select all required configurations for launching an EC2 instance?

    <p>You are prompted to choose an existing key pair or create a new one.</p> Signup and view all the answers

    How does AWS EC2 use public-key cryptography?

    <p>To encrypt and decrypt login information</p> Signup and view all the answers

    Which action is NOT prompted before launching an EC2 instance?

    <p>Customizing instance tags</p> Signup and view all the answers

    What do you need the private key for when connecting to a Linux AMI?

    <p>To use SSH for a secure connection</p> Signup and view all the answers

    When prompted to create a new key pair during the launch process, what does this key pair contain?

    <p>A public key and a private key file</p> Signup and view all the answers

    Which of the following is NOT a type of configuration to specify when launching an EC2 instance?

    <p>Application installation settings</p> Signup and view all the answers

    What does an instance enter when it is first launched from an AMI?

    <p>Pending</p> Signup and view all the answers

    Which state allows you to connect over the internet to your instance?

    <p>Running</p> Signup and view all the answers

    What should be true for the command to successfully create an EC2 instance?

    <p>Resources needed by the command must exist.</p> Signup and view all the answers

    What happens to the public DNS name and public IP address during a reboot of an instance?

    <p>They remain the same</p> Signup and view all the answers

    What state is indicated before an instance becomes fully stopped?

    <p>Stopping</p> Signup and view all the answers

    Which of the following states correctly indicates that an EC2 instance is starting up?

    <p>Pending</p> Signup and view all the answers

    What happens if the command to create an EC2 instance is successfully executed?

    <p>You receive the instance ID and additional relevant data.</p> Signup and view all the answers

    When an instance is terminated, what can you still see in the Amazon EC2 console?

    <p>It remains visible for a while</p> Signup and view all the answers

    Which component is NOT required for creating an EC2 instance via the command?

    <p>Instance ID</p> Signup and view all the answers

    What state must an instance be in to enter the pending state again?

    <p>Stopped</p> Signup and view all the answers

    During which action does an instance change from running to a transitional state?

    <p>Stopping</p> Signup and view all the answers

    Which command state signifies that an EC2 instance has been stopped but can be restarted later?

    <p>Stopped</p> Signup and view all the answers

    What allows EC2 instances to operate within a specific geographical area?

    <p>Region</p> Signup and view all the answers

    What is true about instances backed by Amazon EBS when they are stopped?

    <p>They will not incur costs like running instances</p> Signup and view all the answers

    When an EC2 instance is rebooted, what state does it enter after the command is issued?

    <p>Running</p> Signup and view all the answers

    What condition could prevent the successful creation of an EC2 instance?

    <p>Insufficient capacity in the AWS account.</p> Signup and view all the answers

    Study Notes

    Amazon Machine Image (AMI) Creation

    • An AMI is created from an EC2 instance or imported virtual machine.
    • EC2 instances can be launched from existing AMIs, including AWS-provided Quick Start AMIs.
    • Unmodified instance can serve as a base for a customized "golden instance" with specific OS and application settings.
    • Creating an AMI involves stopping the instance, capturing a snapshot of the root volume, and registering the snapshot.
    • Registered AMIs allow launching new instances within the same AWS Region and can be copied to other Regions.

    EC2 Instance Configuration

    • Instance type selection is crucial and depends on the specific use case.
    • Instance specifications influence:
      • Memory (RAM) capacity
      • Processing power (CPU)
      • Disk space and type
      • Network performance
    • Instance type categories include:
      • General purpose
      • Compute optimized

    Key Pair Management

    • At launch, specify an existing key pair or create a new one for secure access to the instance.
    • A key pair consists of:
      • A public key stored by AWS
      • A private key file kept by the user
    • For Windows AMIs, the private key is used to retrieve the administrator password; for Linux AMIs, it's used for SSH connections.

    Launching EC2 Instances

    • Instance launch involves configuring various options through the Launch Wizard, ending with a review before finalizing.
    • AWS CLI allows programmatic EC2 instance creation; simple command structure includes essential parameters like:
      • --image-id for specifying the AMI ID
      • --count for the number of instances
      • --instance-type for selecting the instance size
      • --key-name for the associated key pair
      • --security-groups for networking configurations
      • --region for specifying the AWS Region of the AMI

    EC2 Instance Lifecycle

    • The lifecycle of an EC2 instance involves several states:
      • Pending: Initial state when an instance is launched or started.
      • Running: Instance is fully booted and operational.
      • Rebooting: Rebooting an instance keeps it on the same host, retaining IP and data on instance store volumes.
      • Stopping: Intermediate state before an EBS-backed instance is fully stopped.
      • Stopped: Instance is powered off, no costs incurred; can be restarted later.
      • Terminated: Instance is permanently deleted after visibility in the console.

    Important Notes on Instance Management

    • Instance actions like starting, stopping, rebooting, and terminating influence state transitions.
    • Sufficient permissions and resource availability are necessary for commands to successfully create instances.
    • Instances' physical resources correlate with the chosen instance type at initialization.

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    Description

    This quiz covers essential topics related to Amazon Machine Images (AMIs) and EC2 instance configuration in AWS. Learn about the creation process of AMIs, instance type selection, and key pair management for secure instance access. Test your knowledge on these foundational concepts for working with AWS.

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