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Snowflake DEA-C01 Exam Syllabus Topics:

Topic	Details
Topic 1	Data Transformation: The SnowPro Advanced: Data Engineer exam evaluates skills in using User-Defined Functions (UDFs), external functions, and stored procedures. It assesses the ability to handle semi-structured data and utilize Snowpark for transformations. This section ensures Snowflake engineers can effectively transform data within Snowflake environments, critical for data manipulation tasks.
Topic 2	Data Movement: Snowflake Data Engineers and Software Engineers are assessed on their proficiency to load, ingest, and troubleshoot data in Snowflake. It evaluates skills in building continuous data pipelines, configuring connectors, and designing data sharing solutions.
Topic 3	Performance Optimization: This topic assesses the ability to optimize and troubleshoot underperforming queries in Snowflake. Candidates must demonstrate knowledge in configuring optimal solutions, utilizing caching, and monitoring data pipelines. It focuses on ensuring engineers can enhance performance based on specific scenarios, crucial for Snowflake Data Engineers and Software Engineers.
Topic 4	Storage and Data Protection: The topic tests the implementation of data recovery features and the understanding of Snowflake's Time Travel and micro-partitions. Engineers are evaluated on their ability to create new environments through cloning and ensure data protection, highlighting essential skills for maintaining Snowflake data integrity and accessibility.
Topic 5	Security: The Security topic of the DEA-C01 test covers the principles of Snowflake security, including the management of system roles and data governance. It measures the ability to secure data and ensure compliance with policies, crucial for maintaining secure data environments for Snowflake Data Engineers and Software Engineers.

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Snowflake SnowPro Advanced: Data Engineer Certification Exam Sample Questions (Q194-Q199):

NEW QUESTION # 194
A company uses Amazon SageMaker AI for its machine learning (ML) workflows. The company is organized into several project groups that use sensitive data. The company needs to give the project groups the ability to discover available datasets across different AWS accounts. The solution must maintain access controls and track all data access for compliance purposes.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create separate Amazon SageMaker Studio domains for each project group with isolated environments and no ability to share data between domains.
B. Set up IAM roles for each project group with permissions to access all datasets across all AWS accounts. Use AWS CloudTrail to record data access activity.
C. Set up Amazon SageMaker Feature Store with cross-account access policies to automatically share data between AWS accounts without requiring approval workflows.
D. Use Amazon SageMaker Assets to publish, discover, and request access to datasets through the asset catalog with approval workflows that track data access.

Answer: D

Explanation:
Amazon SageMaker Assets (via SageMaker Catalog) provides a centralized way to publish and discover datasets across accounts with built-in governance. It supports approval workflows to control access and automatically tracks dataset usage for compliance, meeting the requirements with minimal operational overhead while maintaining proper access controls.

NEW QUESTION # 195
Snowflake computes and adds partitions based on the defined partition column expressions when an external table metadata is refreshed.
What are the Correct Statements to configure Partition metadata refresh in case of External Tables?

A. Metadata refresh is not required as its Managed implicitly by Snowflake.
B. By default, the metadata is refreshed automatically when the object is created.
C. The object owner can configure the metadata to refresh automatically when new or updated data files are available in the external stage.
D. There is nothing like adding partitions on External tables.
E. Partitions of External tables is managed by External Stage Cloud provider.

Answer: B,C

Explanation:
Explanation
Snowflake strongly recommend partitioning your external tables, which requires that your underly-ing data is organized using logical paths that include date, time, country, or similar dimensions in the path.
Partitioning divides your external table data into multiple parts using partition columns.
An external table definition can include multiple partition columns, which impose a multi-dimensional structure on the external data.
Partitions are stored in the external table metadata.
Benefits of partitioning include improved query performance.
Because the external data is partitioned into separate slices/parts, query response time is faster when processing a small part of the data instead of scanning the entire data set.
Based on your individual use cases, you can either:
Add new partitions automatically by refreshing an external table that defines an expression for each partition column.
Add new partitions manually.
Partition columns are defined when an external table is created, using the CREATE EXTERNAL TABLE ...
PARTITION BY syntax.
After an external table is created, the method by which partitions are added cannot be changed.
Partitions Added Automatically
An external table creator defines partition columns in a new external table as expressions that parse the path and/or filename information stored in the METADATA$FILENAME pseudocolumn.
A partition consists of all data files that match the path and/or filename in the expression for the partition column.
The CREATE EXTERNAL TABLE syntax for adding partitions automatically based on expres-sions is as follows:
CREATE EXTERNAL TABLE
<table_name>
( <part_col_name> <col_type> AS <part_expr> )
[ , ... ]
[ PARTITION BY ( <part_col_name> [, <part_col_name> ... ] ) ]
Snowflake computes and adds partitions based on the defined partition column expressions when an external table metadata is refreshed.
By default, the metadata is refreshed automatically when the object is created.
In addition, the object owner can configure the metadata to refresh automatically when new or up-dated data files are available in the external stage.
The owner can alternatively refresh the metadata manually by executing the ALTER EXTERNAL TABLE ...
REFRESH command.
The metadata for an external table can be refreshed automatically using the event notification ser-vice for your cloud storage service.

NEW QUESTION # 196
A company stores CSV files in an Amazon S3 bucket. A data engineer needs to process the data in the CSV files and store the processed data in a new S3 bucket.
The process needs to rename a column, remove specific columns, ignore the second row of each file, create a new column based on the values of the first row of the data, and filter the results by a numeric value of a column.
Which solution will meet these requirements with the LEAST development effort?

A. Use AWS Glue DataBrew recipes to read and transform the CSV files.
B. Use an AWS Glue custom crawler to read and transform the CSV files.
C. Use AWS Glue Python jobs to read and transform the CSV files.
D. Use an AWS Glue workflow to build a set of jobs to crawl and transform the CSV files.

Answer: A

Explanation:
AWS Glue DataBrew is a visual data preparation tool that allows you to clean, normalize, and transform data without writing code. Using DataBrew recipes, you can easily perform transformations such as renaming columns, removing specific columns, ignoring certain rows, creating new columns, and filtering data based on column values. This solution requires the least development effort because it provides a no-code/low-code interface for performing these tasks.
While AWS Glue Python jobs can handle these transformations, they would require writing custom code, which involves more development effort compared to using DataBrew.
AWS Glue crawlers are used for cataloging data and are not suitable for performing complex transformations like ignoring rows, renaming columns, or creating new columns.
Using an AWS Glue workflow to build a set of jobs to crawl and transform the CSV files adds unnecessary complexity. You would need to orchestrate multiple jobs and workflows, which requires more setup and development compared to using DataBrew for the transformations.

NEW QUESTION # 197
Which of the following best describes the type of data found in traditional relational databases?

A. Structured data
B. Unstructured data
C. Free-form data
D. Semi-structured data

Answer: A

NEW QUESTION # 198
A company has a data warehouse that contains a table that is named Sales. The company stores the table in Amazon Redshift. The table includes a column that is named city_name. The company wants to query the table to find all rows that have a city_name that starts with "San" or
"El".
Which SQL query will meet this requirement?

A. Select * from Sales where city_name ~ '$(San|El)*';
B. Select * from Sales where city_name ~ '
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