Module 2: Troubleshooting AWS Services

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In this post, I provide complete, accurate, and detailed explanations for the answers to Module 2: Troubleshooting AWS Services of Course 3: Providing Technical Support for AWS Workloads Whether you’re preparing for quizzes or brushing up on your knowledge, these insights will help you master the concepts effectively. Let’s dive into the correct answers and detailed explanations for each question!

Knowledge check

Practice Assignment

1. Which Amazon VPC Flow Log record fields are part of a log record with a default format? (Select TWO.)

  • The source address for incoming traffic ✅
  • The AWS account ID of the owner of the source network interface ✅
  • AWS Identity and Access Management (IAM) user name of the user sending or receiving data
  • Source operating system (OS) of the system where the requests originated
  • Amazon Simple Storage Service (Amazon S3) bucket name

Explanation:
Amazon VPC Flow Logs capture information about IP traffic going to and from network interfaces in a VPC. In the default format, the following fields are included:

  • srcaddr (source address for incoming traffic)
  • account-id (AWS account ID of the interface owner)

Module 2 assessment

Graded Assignment

2. True or False: To troubleshoot issues inside a virtual private cloud (VPC), users can use VPC Flow Logs.

  • True ✅
  • False

3. A company is hosting a web application on Amazon Elastic Compute Cloud (Amazon EC2). The application resides in a public subnet that’s inside a custom virtual private cloud (VPC), and it connects to the internet by using a public IPv4 address. When users try to open the application, they receive a connection timeout error. Which option should the support team investigate so the application can communicate with the internet?

  • VPC peering
  • AWS Identity and Access Management (IAM) permissions
  • Internet gateway ✅
  • AWS Lambda

Explanation:
An Internet Gateway is required for instances in a public subnet to communicate with the internet. If it’s missing or not properly configured, users will face connection issues.

4. What must users do to invoke a function in AWS Lambda?

  • Create a website
  • Add code in the Lambda console
  • Add a trigger or an event source ✅
  • Create an Amazon DynamoDB table

5. When a company deploys an application on an Amazon Elastic Compute Cloud (Amazon EC2) instance, the operations team notices that the instance does not pass instance status checks. What should the support team look at to investigate the issue?

  • Software problems on the physical host machines
  • Underlying infrastructure, including Regions, Availability Zones, and edge locations
  • Network connectivity and hardware issues
  • Network connectivity and operating system configurations ✅

Explanation:
Instance status checks fail due to issues inside the instance like misconfigured network settings, OS problems, etc.

6. Which AWS service provides monitoring for AWS resources?

  • Amazon CloudWatch ✅
  • AWS Identity and Access Management (IAM)
  • Amazon Virtual Private Cloud (Amazon VPC)
  • AWS Lambda

Related contents:

Module 1: Troubleshoot Cloud-Related Issues
Module 3: Topical Customer Scenarios

You might also like:

Course 1: Introduction to Information Technology and AWS Cloud
Course 2: AWS Cloud Technical Essentials
Course 4: Developing Applications in Python on AWS
Course 5: Skills for Working as an AWS Cloud Consultant
Course 6: DevOps on AWS and Project Management
Course 7: Automation in the AWS Cloud
Course 8: Data Analytics and Databases on AWS
Course 9: Capstone: Following the AWS Well Architected Framework

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