Export to S3 in DynamoDB - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ query_result

intermediate

What is the output of this DynamoDB export command?

You run the following AWS CLI command to export a DynamoDB table to S3:

aws dynamodb export-table-to-point-in-time --table-arn arn:aws:dynamodb:us-east-1:123456789012:table/Books --s3-bucket my-export-bucket --export-format DYNAMODB_JSON

What will be the result of this command?

A Creates a backup of the table inside DynamoDB but does not export to S3.

B Immediately downloads the entire table data to your local machine in JSON format.

C Deletes the DynamoDB table after exporting its data to S3.

D Starts an export job that saves the table data in DynamoDB JSON format to the specified S3 bucket.

💡 Hint

Think about what the export-table-to-point-in-time command does with the S3 bucket.

The command starts an asynchronous export job that saves the table data in the specified format to the given S3 bucket. It does not download data locally or delete the table.

🧠 Conceptual

intermediate

Which of these is required to export a DynamoDB table to S3?

To export a DynamoDB table to an S3 bucket, which of the following is a mandatory requirement?

A The DynamoDB table must be encrypted with a customer-managed key.

B The export operation requires the table to be in read-only mode.

C The S3 bucket must be in the same AWS region as the DynamoDB table.

D The S3 bucket must have versioning disabled.

💡 Hint

Think about AWS region restrictions for export operations.

The S3 bucket must be in the same AWS region as the DynamoDB table to perform the export. Other options are not mandatory requirements.

📝 Syntax

advanced

Which AWS CLI command correctly exports a DynamoDB table to S3 in Parquet format?

Choose the correct AWS CLI command to export a DynamoDB table named 'Orders' to an S3 bucket 'my-orders-bucket' in Parquet format.

A aws dynamodb export-table-to-point-in-time --table-arn arn:aws:dynamodb:us-east-1:123456789012:table/Orders --s3-bucket my-orders-bucket --export-format PARQUET

B aws dynamodb export-table --table-name Orders --bucket my-orders-bucket --format parquet

C aws dynamodb export-to-s3 --table Orders --bucket my-orders-bucket --format parquet

D aws dynamodb export-table-to-point-in-time --table-name Orders --s3-bucket my-orders-bucket --export-format JSON

💡 Hint

Check the exact command name and parameter names for exporting tables.

Option A uses the correct command and parameters including the table ARN, S3 bucket, and export format PARQUET. Other options use incorrect commands or parameters.

❓ optimization

advanced

How to minimize costs when exporting large DynamoDB tables to S3?

You have a large DynamoDB table and want to export it to S3 with minimal cost. Which approach helps reduce costs?

A Export only a point-in-time snapshot instead of continuous backups.

B Export the table multiple times per hour to keep data fresh.

C Use on-demand backups instead of export to S3.

D Export the table to an S3 bucket in a different AWS region.

💡 Hint

Think about how export jobs and backups are billed.

Exporting a point-in-time snapshot is a one-time operation and cheaper than frequent exports or continuous backups. Exporting to a different region is not supported and increases costs.

🔧 Debug

expert

Why does this DynamoDB export command fail with AccessDeniedException?

You run:

aws dynamodb export-table-to-point-in-time --table-arn arn:aws:dynamodb:us-east-1:123456789012:table/Users --s3-bucket my-secure-bucket --export-format DYNAMODB_JSON

But get an AccessDeniedException error. What is the most likely cause?

A The S3 bucket name contains uppercase letters which are not allowed.

B The IAM role used does not have permission to write to the specified S3 bucket.

C The export format DYNAMODB_JSON is not supported.

D The DynamoDB table does not exist in the specified region.

💡 Hint

AccessDeniedException usually relates to permissions.

The export operation requires the IAM role to have permission to write to the S3 bucket. Without this, the export fails with AccessDeniedException.