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Snowflake DAA-C01 Exam Syllabus Topics:

Section Objectives
Data Loading and Unloading - Data export
  • 1. UNLOAD and external stages
    - Data ingestion methods
    • 1. COPY INTO and bulk loading
      • 2. Continuous ingestion and Snowpipe concepts
        Data Transformation and Analysis - SQL-based transformations
        • 1. Joins, aggregations, window functions
          • 2. Semi-structured data (VARIANT, JSON, XML)
            - Analytical workloads
            • 1. Query optimization for analytics
              • 2. Materialized views and caching
                Snowflake Architecture and Data Platform Fundamentals - Snowflake architecture concepts
                • 1. Cloud services layer, compute layer, storage layer
                  • 2. Virtual warehouses and scaling
                    - Data platform fundamentals
                    • 1. Separation of storage and compute
                      • 2. Data lifecycle in Snowflake
                        Data Modeling and Performance Optimization - Performance tuning
                        • 1. Clustering and pruning techniques
                          • 2. Warehouse sizing and auto-suspend/auto-resume
                            - Modeling approaches in Snowflake
                            • 1. Star and snowflake schemas
                              • 2. Data normalization vs denormalization
                                Security, Governance, and Data Sharing - Access control and security
                                • 1. Authentication and encryption concepts
                                  • 2. Role-based access control (RBAC)
                                    - Data sharing and governance
                                    • 1. Data masking and policies
                                      • 2. Secure data sharing

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                                        Snowflake SnowPro Advanced: Data Analyst Certification Exam Sample Questions (Q32-Q37):

                                        NEW QUESTION # 32
                                        You are tasked with cleaning a 'customer_orders' table in Snowflake. The table contains columns like 'order_id', 'customer_id', 'order_date', and 'order_amount'. You notice that some 'order_amount' values are negative (representing returns), but you need to analyze total sales. Additionally, some 'order_date' values are in the future. Which of the following SQL transformations would BEST address these data quality issues to ensure accurate sales analysis?

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

                                        Answer: A

                                        Explanation:
                                        Option C correctly addresses both issues. ensures that all amounts are positive, effectively treating returns as positive contributions to sales for the purpose of this specific analysis. 'order_date <= filters out future dates. Options A and D also exclude negative order amounts which is incorrect, whereas options B and E do not make all amounts positive for sales amount. The use of CTE is also correct. The question is testing the candidate on how to select the best transformations for given data challenges.


                                        NEW QUESTION # 33
                                        You're working with product catalog data in Snowflake. The product information is stored in a table named 'PRODUCTS' , and a key attribute, 'attributes' , contains a semi-structured JSON object for each product. This 'attributes' object can have varying keys, but you are interested in extracting specific keys and pivoting them into columns. The relevant JSON structure is as follows : { "color": "red", "size": "L", "material": "cotton", "style": "casual"} '"What method is the MOST efficient to transform this data to a relational structure, assuming you want to analyze product attributes such as 'color' and 'size' as separate columns?

                                        • A. Using LATERAL FLATTEN to unnest the 'attributes' and then using a CASE statement to pivot the data.
                                        • B. Using a stored procedure to iterate through each row, parse the JSON, and update a new table with pivoted columns.
                                        • C. Creating a view with direct JSON path accessors (e.g., for each desired attribute.
                                        • D. Creating a new table with a 'VARIANT column for the attributes and performing transformations in a BI tool.
                                        • E. Using dynamic SQL to generate a query that extracts the required attributes using JSON path accessors and then creates a new table.

                                        Answer: C

                                        Explanation:
                                        Option B is the most efficient. Directly accessing the JSON elements using path accessors like allows Snowflake to optimize the query execution, which typically offers superior performance compared to flattening and pivoting with 'CASE statements. Flattening (Option A) introduces unnecessary complexity and overhead when specific attributes are known and desired. Options C and D are generally inefficient and should be avoided for this type of transformation. Creating a view is more performant and simple. Option E is overkill and introduces complexity that isn't needed since the required attributes are known.


                                        NEW QUESTION # 34
                                        Your company is using Snowflake to store customer transaction data'. You want to enrich this data with demographic information from a Snowflake Marketplace data provider. The provider offers a secure data share with a view called 'CUSTOMER DEMOGRAPHICS. You need to join the customer transaction data in your 'TRANSACTIONS' table with the demographic data from the 'CUSTOMER DEMOGRAPHICS' view. Which of the following SQL queries is the MOST efficient and secure way to achieve this, assuming you have already created a database from the share?

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

                                        Answer: B

                                        Explanation:
                                        Option B is the most efficient and secure because it explicitly uses an INNER JOIN, ensuring that only matching records between the TRANSACTION table and the Customer Demographics view are included. Using INNER JOIN improves performance compared to implicit joins (Option A). Options C and E uses LEFT and FULL OUTER joins which might result in unnecessary nulls and impacting the perfromance. Option D will not work because the schema name is missing.


                                        NEW QUESTION # 35
                                        You have a large CSV file containing customer transaction data that you need to load into Snowflake using Snowsight. The CSV file is located in an AWS S3 bucket. The file contains fields like 'transaction id', 'customer id', 'transaction date', and 'transaction amount. However, the 'transaction_date' column is in the format 'YYYYMMDD' and you need to convert it to Snowflake's DATE format ('YYYY-MM-DD') during the load process. Which of the following steps should you take in Snowsight to accomplish this efficiently and correctly?

                                        • A. Create an external table pointing to the S3 bucket. Then, create a view on top of the external table with the 'TO_DATE(transaction_date, 'YYYYMMDD')' transformation applied. Finally, create a new table using 'CREATE TABLE AS SELECT from the view.
                                        • B. Load the CSV file into Snowflake without any transformation. Write a stored procedure to transform the 'transaction_date' column and schedule the stored procedure to run periodically.
                                        • C. Use Snowsight's 'Load Data' wizard to load the CSV file directly into a table with the required schema. After loading, execute an "UPDATE statement to convert the 'transaction_date' column using 'TO DATE(transaction_date, YYYYMMDD'V.
                                        • D. Create a new table in Snowflake with the desired schema (including DATE data type for 'transaction_date'). Use Snowsight's 'Load Data' wizard to load the CSV file, selecting the appropriate file format options and using a computed column expression 'TO_DATE(transaction_date, 'YYYYMMDD')' for the 'transaction date' column.
                                        • E. Load the data into a staging table with all columns as VARCHAR. Then, create a new table with the desired schema. Finally, use a 'CREATE TABLE AS SELECT (CTAS) statement with 'TO DATE(transaction_date, to transform and load the data from the staging table to the final table.

                                        Answer: D

                                        Explanation:
                                        Option A is the most efficient and correct approach. Snowsight's 'Load Data' wizard allows you to specify transformations during the load process using computed columns, which is more performant than loading into a staging table or updating after loading. Options B, C, D and E are functional but less efficient due to the extra steps involved. Using external tables for initial loading then CTAS can be good for exploration but not as direct as option A. Updates should generally be avoided on large datasets after loading when you have a chance to transform during load.


                                        NEW QUESTION # 36
                                        You have a table 'CUSTOMER DATA with sensitive information like 'SSN' and 'CREDIT CARD NUMBER. You need to provide access to analysts for reporting purposes but must mask the sensitive columns. You decide to use a combination of Secure Views and data masking policies. Consider the following code snippets:

                                        An analyst with the 'ANALYST ROLE executes the following query: SELECT FROM ANALYST CUSTOMER VIEW LIMIT 10; What will be the value of the 'SSN' column in the result set for the analyst?

                                        • A. NULL
                                        • B. '--'
                                        • C. An error will be thrown because a secure view cannot display a masked column.
                                        • D. An error will be thrown because the analyst does not have direct access to the table.
                                        • E. The actual SSN value from the 'CUSTOMER DATA' table.

                                        Answer: B

                                        Explanation:
                                        The masking policy 'mask_ssn' is applied to the 'SSN' column in the 'CUSTOMER DATA' table. Because the analyst executing the query has the 'ANALYST_ROLE, the masking policy will transform the 'SSN' value to - before the result set is returned. Secure Views can access masked columns and display them according to the policy definition. The secure view ensures that the analyst can only access the data through the view, further enhancing security.


                                        NEW QUESTION # 37
                                        ......

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