AWS Cloud Engineering Troubleshooting Flashcard

Front

What could be a reason for an EC2 instance being unable to receive traffic from the internet? Options: The instance is in a public subnet with an internet gateway. The instance has a public IP assigned. The instance is using an Elastic IP. The instance is in a private subnet without a NAT gateway.

Back

The instance is in a private subnet without a NAT gateway.

Front

To set up your AWS credentials for the CLI, type: ________

Back

aws configure

Front

Which of the following is a potential issue if an IAM role is not allowing access to an S3 bucket? The IAM role is using the default AWS managed policy. The IAM role is attached to an EC2 instance. The S3 bucket is in the same region as the IAM role.

Back

The IAM policy attached to the role does not include the necessary S3 permissions.

Front

Why might an SSH connection to an EC2 instance fail? Options: The private key used for the connection does not match the public key on the instance., The NACL allows inbound traffic on port 22., The instance is running a Linux operating system., The security group allows inbound traffic on port 22.

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The private key used for the connection does not match the public key on the instance.

Front

What could cause a security group to block traffic unexpectedly?

Back

The security group has a rule that denies traffic from a specific IP range.

Front

Which of the following could prevent a GitHub repository from being cloned to an EC2 instance?
The repository is public.
The EC2 instance does not have internet access.
The GitHub repository is in a different region.
The EC2 instance is using an IAM role with S3 permissions.

Back

The EC2 instance does not have internet access.

Front

You're trying to deploy a CloudFormation template but receive this error: Template format error: YAML not well-formed. (line 3, column 5)

Looking at the template below, what is the syntax issue?

Back

Missing a colon after "MyS3Bucket"

Front

Why might an EC2 instance fail to connect to an RDS database? Options: The RDS database is in a different availability zone., The security group of the RDS does not allow inbound traffic from the EC2 instance., The RDS database is using a different AWS account., The EC2 instance does not have an IAM role.

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The security group of the RDS does not allow inbound traffic from the EC2 instance.

Front

What could be a reason for a Lambda function failing to write to an S3 bucket? Options: The Lambda function is in a different region., The S3 bucket is not public., The Lambda function does not have the necessary IAM permissions., The S3 bucket is empty.

Back

The Lambda function does not have the necessary IAM permissions.

Front

Your EC2 instance in a private subnet can't access the internet despite having a route to a NAT gateway. What should you check? Options: The NAT gateway is in a public subnet, The NAT gateway has an Elastic IP address, The private subnet's route table has a route to the NAT gateway, All of the above

Back

All of the above