A Company Has a Business Unit Uploading

question 28

Multiple Choice

A company has a business unit uploading .csv files to an Amazon S3 bucket. The company's data platform team has set up an AWS Glue crawler to do discovery, and create tables and schemas. An AWS Glue job writes processed data from the created tables to an Amazon Redshift database. The AWS Glue job handles column mapping and creating the Amazon Redshift table appropriately. When the AWS Glue job is rerun for any reason in a day, duplicate records are introduced into the Amazon Redshift table. Which solution will update the Redshift table without duplicates when jobs are rerun?

• A) Modify the AWS Glue job to copy the rows into a staging table. Add SQL commands to replace the existing rows in the main table as postactions in the DynamicFrameWriter class.
• B) Load the previously inserted data into a MySQL database in the AWS Glue job. Perform an upsert operation in MySQL, and copy the results to the Amazon Redshift table.
• C) Use Apache Spark's DataFrame dropDuplicates() API to eliminate duplicates and then write the data to Amazon Redshift.
• D) Use the AWS Glue ResolveChoice built-in transform to select the most recent value of the column.

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Definitions:

Total Assets

The sum of all current and non-current assets owned by a company, as reflected in its balance sheet.

Stockholders' Equity

The portion of a corporation’s assets that remains after deducting debts, which indicates an equity interest.

Internal Users

Internal users are individuals within an organization who use financial information to make decisions, including managers, employees, and owners.

External Users

Individuals or organizations outside a company who use its financial statements for decision-making purposes, such as investors, creditors, and regulatory agencies.