Amazon EC2 Overview Quiz
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Questions and Answers

What is the primary purpose of Amazon EC2?

  • To provide a database management system in the cloud
  • To provide a virtual storage service in the cloud
  • To provide resizable compute capacity in the cloud (correct)
  • To provide a content delivery network in the cloud

    • What is an Amazon Machine Image (AMI)?

  • A virtual server instance in the AWS cloud
  • A preconfigured template for launching EC2 instances (correct)
  • A security group for EC2 instances
  • A type of EC2 instance with high processing power

    • What is the purpose of EC2 compute units (ECUs)?

  • To measure the networking capacity of an EC2 instance
  • To measure the storage capacity of an EC2 instance
  • To measure the memory capacity of an EC2 instance
  • To provide a relative measure of the integer processing power of an EC2 instance (correct)

    • What is the default setting for public IP assignment when launching an EC2 instance?

    <p>Use the subnet setting</p> Signup and view all the answers

    What is the purpose of instance types in Amazon EC2?

    <p>To provide a wide selection of resources that can be customized for different use cases</p> Signup and view all the answers

    What is termination protection in Amazon EC2?

    <p>A feature that prevents you from terminating an instance</p> Signup and view all the answers

    What is the purpose of key pairs in Amazon EC2?

    <p>To securely connect to EC2 instances</p> Signup and view all the answers

    What is the default monitoring period for EC2 instances?

    <p>5-minute periods</p> Signup and view all the answers

    What is the primary purpose of the Elastic Fabric Adapter (EFA)?

    <p>To enhance inter-node communication performance for applications requiring high-throughput.</p> Signup and view all the answers

    Under what circumstance can you modify an EC2 instance's attributes?

    <p>When the instance is in a stopped state.</p> Signup and view all the answers

    Which of the following is NOT a feature of Enhanced Networking using Elastic Network Adapter (ENA)?

    <p>Ability to add multiple ENIs to increase network bandwidth.</p> Signup and view all the answers

    What is the default network interface created when launching an EC2 instance?

    <p>eth0</p> Signup and view all the answers

    What is the benefit of using BYOIP (Bring Your Own IP)?

    <p>It allows you to use your own IP addresses within an AWS VPC.</p> Signup and view all the answers

    When can you attach a network interface to an EC2 instance in a different subnet?

    <p>Only if the subnets are in the same Availability Zone.</p> Signup and view all the answers

    What happens to manually added network interfaces when an EC2 instance is terminated?

    <p>They are automatically detached from the instance but remain active.</p> Signup and view all the answers

    What is the main difference between an Elastic Network Adapter (ENA) and an Elastic Fabric Adapter (EFA)?

    <p>EFA is designed for high-throughput inter-node communication while ENA focuses on general network performance.</p> Signup and view all the answers

    What is the primary purpose of using a placement group in AWS EC2?

    <p>To improve the performance of applications by grouping instances with low latency and high bandwidth.</p> Signup and view all the answers

    Which of the following is NOT a valid placement group configuration in AWS EC2?

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

    What is the recommended way to achieve the best performance when communicating between instances within a placement group?

    <p>Using private IP addresses.</p> Signup and view all the answers

    Which of the following is a benefit of using IAM roles for EC2 instances instead of access keys?

    <p>All of the above.</p> Signup and view all the answers

    What is the purpose of a bastion host in AWS EC2?

    <p>To provide a secure gateway for accessing instances within a VPC.</p> Signup and view all the answers

    Which of the following statements about EC2 status checks is TRUE?

    <p>System status checks are used to detect problems that require user involvement to repair.</p> Signup and view all the answers

    What is the maximum number of IAM roles that can be attached to an EC2 instance at any given time?

    <p>1</p> Signup and view all the answers

    Which of the following AWS services can be used as an alternative to bastion hosts for managing EC2 instances?

    <p>AWS Systems Manager Session Manager</p> Signup and view all the answers

    What is a recommended approach for rebooting an EC2 instance?

    <p>Using EC2</p> Signup and view all the answers

    What is the purpose of AWS CloudTrail?

    <p>To provide a record of actions taken by a user, role, or an AWS service</p> Signup and view all the answers

    What is the maximum number of tags that can be assigned to an AWS resource?

    <p>50</p> Signup and view all the answers

    What is the purpose of Amazon Route 53 health checks?

    <p>To redirect traffic in case of failure</p> Signup and view all the answers

    What is the purpose of VM Import/Export?

    <p>To convert EC2 instances to VMware, Microsoft, or XEN VMs</p> Signup and view all the answers

    What is AWS Server Migration Service (SMS) used for?

    <p>To automate, schedule, and track incremental replications of live server volumes</p> Signup and view all the answers

    What is a benefit of using Reserved Instances?

    <p>To guarantee resources will be available when needed</p> Signup and view all the answers

    What is the purpose of the unified CloudWatch agent?

    <p>To enable logging and auditing</p> Signup and view all the answers

    When an EC2 instance is stopped, what happens to its public IPv4 address?

    <p>It is lost, but a new one is assigned when the instance is restarted.</p> Signup and view all the answers

    Which pricing model allows users to pay a discounted rate for instances in exchange for committing to a certain usage period?

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

    What is the maximum number of On-Demand instances that can be run across an instance family in a single region?

    <p>20</p> Signup and view all the answers

    What is the purpose of an Elastic IP address?

    <p>To provide a static public IP address that can be reassigned to different instances.</p> Signup and view all the answers

    What is the difference between dedicated instances and dedicated hosts?

    <p>Dedicated instances provide access to a dedicated physical server, while dedicated hosts provide access to a dedicated logical partition within a physical server.</p> Signup and view all the answers

    What is the primary difference between EBS volumes and Instance Store volumes?

    <p>EBS volumes are persistent, while Instance Store volumes are temporary.</p> Signup and view all the answers

    When are EC2 instances billed?

    <p>Only when they are in a running state.</p> Signup and view all the answers

    Which type of IP address is assigned to EC2 instances by default?

    <p>Private IPv4</p> Signup and view all the answers

    Study Notes

    Amazon EC2 Overview

    • Amazon EC2 provides resizable compute capacity in the cloud
    • Launch virtual server instances (instances) on the AWS cloud using preconfigured templates (Amazon Machine Images, AMIs)
    • Each AMI includes information needed to launch an EC2 instance (operating system, software packages, etc.)

    EC2 Instances

    • Each instance type includes one or more instance sizes, allowing for scalability
    • Choose an AMI, instance type, and configure settings (e.g., public IP, IAM role, monitoring)
    • Instances can be assigned to IAM roles for access to AWS resources
    • Termination protection can be enabled to prevent accidental termination

    Storage Options

    • Additional volumes can be added to instances
    • Choose volume type (e.g., EBS, instance store)
    • Use Amazon Elastic File System (EFS) for mounting a shared filesystem to multiple EC2 instances
    • Root and non-root volumes can be encrypted

    Billing and Provisioning

    • On-demand, Reserved, and Spot pricing models available
    • On-demand instances are charged by the hour or second
    • Reserved instances provide a discount for committed usage
    • Spot instances are discounted, but can be interrupted by AWS

    Networking

    • Three types of IP addresses: public IPv4, private IPv4, and IPv6
    • Elastic IP addresses are static public IP addresses that can be remapped between instances
    • IP addresses can be assigned, reassigned, or detached from instances
    • Elastic Network Interfaces (ENIs) represent virtual network cards
    • Enhanced Networking (ENA) provides higher bandwidth and lower latency
    • Elastic Fabric Adapter (EFA) enables high-performance inter-node communications

    Placement Groups

    • Placement groups are logical groupings of instances for low-latency communication
    • Three types: Cluster, Spread, and Partition
    • Recommended for applications that benefit from low latency and high bandwidth

    IAM Roles

    • IAM roles provide secure access to AWS services
    • Roles can be attached to instances at launch or later
    • Only one IAM role can be attached to an instance at a time

    Monitoring and Logging

    • EC2 status checks detect problems with instances
    • System status checks detect problems requiring AWS involvement
    • Instance status checks detect problems requiring user involvement
    • CloudWatch alarms can be triggered by status checks
    • Unified CloudWatch Agent enables logging and monitoring

    Security and Auditing

    • AWS CloudTrail provides a record of actions taken in AWS
    • CloudTrail captures API calls for EC2 and EBS as events
    • Trails enable continuous delivery of events to an S3 bucket

    Tagging and Resource Management

    • Tags are labels assigned to AWS resources for metadata
    • Tags can be used for cost allocation, security, automation, and more
    • Resource groups are mappings of AWS assets defined by tags

    High Availability Approaches

    • Up-to-date AMIs are critical for rapid fail-over
    • Horizontally scalable architectures are preferred for spreading risk
    • Reserved instances guarantee resource availability when needed
    • Auto Scaling and Elastic Load Balancing work together for automated recovery

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