Snowflake SnowPro Advanced: Data Engineer (DEA-C02) : DEA-C02

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Snowflake DEA-C02 Prüfungsthemen:

Snowflake SnowPro Advanced: Data Engineer (DEA-C02) DEA-C02 Prüfungsfragen mit Lösungen

Frage #1
You have a directory table 'my_directory_table' pointing to a stage containing CSV files with headers. You need to query the directory table to find all files modified in the last 24 hours and load those CSV files using COPY INTO into a target table Assume the target table exists and has appropriate schema'. Which of the following SQL statements, or set of statements, will accomplish this efficiently? Note: Consider efficient file loading.

A.

B.

C.

D.

E.

Frage #2
You are working with a Snowpark DataFrame named 'customer data' that contains sensitive Personally Identifiable Information (PII). The DataFrame has columns such as 'customer id', 'name', 'email' , and 'phone number'. Your task is to create a new DataFrame that only contains 'customer id' and a hash of the 'email' address for anonymization purposes, while also filtering out any customers whose 'customer id' starts with 'TEMP'. Which of the following approaches adheres to best practices for data security and efficiency in Snowpark, using secure hashing algorithms provided by Snowflake?

A. Option B
B. Option C
C. Option D
D. Option E
E. Option A

Frage #3
You have configured a Snowpipe to load data from an AWS S3 bucket into a Snowflake table. The data in S3 is updated frequently. You've noticed that despite the Snowpipe being active and the S3 event notifications being configured correctly, some newly added files are not being picked up by the Snowpipe. You run 'SYSTEM$PIPE and see the 'executionstate' is 'RUNNING' but the 'pendingFileCount' remains at O, even after new files are placed in the S3 bucket. Choose all of the reasons that could explain the observations.

A. The S3 event notification configuration is missing the 's3:ObjectCreated: event type, meaning that new file creation events are not being sent to the SQS queue or SNS topic.
B. The SQS queue or SNS topic associated with the S3 event notifications has a message retention period that is too short. Messages containing event details for new files are being deleted before Snowpipe can process them.
C. The file format specified in the Snowpipe definition does not match the actual format of the files being placed in the S3 bucket.
D. There is an insufficient warehouse size configured for the Snowpipe. Increase the warehouse size for optimal performance.
E. The IAM role associated with your Snowflake account does not have sufficient permissions to read from the S3 bucket. Specifically, it lacks the 's3:GetObject' permission.

Frage #4
A provider account is sharing a database named 'SHARED DB' through a share named 'MY SHARE. The consumer account has created a database named 'CONSUMER DB' from the share. The provider account revokes access to a table named 'SALES DATA within 'SHARED DB'. What will happen when a user in the consumer account attempts to query 'CONSUMER DB.SHARED SCHEMA.SALES DATA'?

A. The query will be cached based on the initial access, so users can continue query previous result based on same SQL
B. The query will execute successfully, but the user will receive an empty result set.
C. The query will be automatically re-routed to another available share containing 'SALES DATA'.
D. The query will fail with an error message indicating that the table does not exist or the user does not have privileges.
E. The query will execute successfully, but only return data that existed before the access was revoked.

Frage #5
You are using Snowpipe to continuously load JSON data from an Azure Blob Storage container into a Snowflake table. The data contains nested JSON structures. You observe that some records are not being loaded into the table, and the 'VALIDATION MODE shows 'PARSE ERROR' for these records. Examine the following COPY INTO statement and the relevant error message from 'VALIDATION MODE', and identify the most likely cause of the problem. COPY INTO my_table FROM FILE FORMAT = (TYPE = JSON STRIP OUTER ARRAY = TRUE) ON ERROR = CONTINUE; Error Message (from VALIDATION MODE): 'JSON document is not well formed: invalid character at position 12345'

A. Snowpipe is encountering rate limiting issues with Azure Blob Storage. Implement retry logic in your Snowpipe configuration.
B. The file format definition is missing a 'NULL IF' parameter which is causing Snowflake to attempt to load string values that should be NULL.
C. The 'STRIP OUTER ARRAY' parameter is causing the issue because the incoming JSON data is not wrapped in an array. Remove the 'STRIP OUTER ARRAY' parameter from the COPY INTO statement.
D. The Snowflake table schema does not match the structure of the JSON data. Verify that the column names and data types in the table are compatible with the JSON fields.
E. The JSON data contains invalid characters or formatting errors at position 12345, as indicated in the error message. Cleanse the source data to ensure it is well-formed JSON before loading.

Fragen und Antworten: