A data engineer needs to create an AWS Lambda function that converts the format of data from .csv to Apache Parquet. The Lambda function must run only if a user uploads a .csv file to an Amazon S3…

Question

Options

• ACreate an S3 event notification that has an event type of s3:ObjectCreated:*. Use a filter rule to
• BCreate an S3 event notification that has an event type of s3:ObjectTagging:* for objects that have
• CCreate an S3 event notification that has an event type of s3:*. Use a filter rule to generate
• DCreate an S3 event notification that has an event type of s3:ObjectCreated:*. Use a filter rule to

• A
  79% (22)
• B
  7% (2)
• C
  4% (1)
• D
  11% (3)

Explanation

S3 event notifications with event type s3:ObjectCreated:* fire whenever a new object is created (via PUT, POST, COPY, or multipart upload completion). Adding a suffix filter rule for '.csv' ensures the notification - and therefore the Lambda invocation - only fires for .csv files, not all uploads. This is the most direct, low-overhead approach. Option B (s3:ObjectTagging:) triggers on tagging events, not object creation, so a user uploading a .csv would not trigger it unless they also tagged the object. Option C (s3:) is far too broad and would fire on deletions, ACL changes, and other irrelevant events. Option D is a duplicate of A in the way it's described, but A is the canonical correct form.

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