ユニーク-正確的なDAA-C01試験時間試験-試験の準備方法DAA-C01前提条件あなたはこのような人々の一人ですか。さまざまな資料とトレーニング授業を前にして、どれを選ぶか本当に困っているのです。もしそうだったら、これ以上困ることはないです。Fast2testはあなたにとって最も正確な選択ですから。我々はあなたに試験問題と解答に含まれている全面的な試験資料を提供することができます。Fast2testの解答は最も正確な解釈ですから、あなたがより良い知識を身につけることに助けになれます。Fast2testを利用したら、SnowflakeのDAA-C01認定試験に受かることを信じています。それも我々が全てのお客様に対する約束です。 Snowflake SnowPro Advanced: Data Analyst Certification Exam 認定 DAA-C01 試験問題 (Q48-Q53):質問 # 48
A data analyst is working with JSON data representing product reviews. The JSON structure is complex, containing nested arrays and objects. The analyst needs to extract all the reviewer names (reviewer _ name) who gave a rating greater than 4, along with the product ID (product_id) and the overall average rating of that specific product. The table 'RAW REVIEWS contains a single VARIANT column named holding the JSON data'. Choose the most efficient and correct Snowflake SQL query to achieve this. Assume the JSON structure is consistent across all rows.
A. Option C
B. Option B
C. Option A
D. Option E
E. Option D
正解：A
解説：
Option C correctly uses LATERAL FLATTEN to unnest the 'reviews' array within the JSON. It accurately extracts 'reviewer_name' and 'rating' from the flattened array 'r'. Critically, it correctly retrieves directly from the 'raw_json' column as the product ID is not within the nested 'reviews' array, but at the root level. The average rating is correctly calculated using a window function partitioned by the Option A incorrectly references the product_id in the flatten table.Option B is inefficient and incorrect because it assumes only one review exists ([0]) and uses GET PATH, which is less performant than direct path access. Options D is also incorrect for average rating as raw_json:reviews[0].rating will pick only the first rating in JSON to derive avg_rating.
質問 # 49
How do Snowsight dashboards facilitate the presentation of data for business use analyses?
A. Snowsight doesn't support visual data representation.
B. Snowsight limits data representation options, hindering analyses.
C. Snowsight dashboards are exclusively text-based, limiting analyses.
D. They enable diverse data representation for effective analyses.
正解：D
解説：
Snowsight dashboards enable diverse data representation for effective analyses in business use cases.
質問 # 50
You are working with a Snowflake environment where data analysts need to query Parquet files located in AWS S3. The analysts require the ability to perform complex aggregations and joins with other Snowflake tables. Some of the Parquet files have evolved their schema over time, adding new columns. Given these requirements, which set of actions would provide the MOST efficient and maintainable solution? Choose the THREE most appropriate actions.
A. Create materialized views on top of the external table, extracting frequently used columns and performing common aggregations to pre-compute results.
B. Develop custom SQL scripts to manually extract data from the external table into temporary tables with specific schemas, then perform aggregations and joins using those temporary tables.
C. Implement a process to periodically load the Parquet files into Snowflake internal tables using 'COPY INTO , inferring the schema from the Parquet files and creatin a new table version whenever the schema changes. Create views to handle the multi le table versions.
D. Implement a data pipeline that continuously ingests the Parquet data into a Snowflake internal table with a defined schema, ensuring all possible columns are included and using a VARIANT type for potentially evolving fields.
E. Create an external table in Snowflake pointing to the S3 bucket and use the 'VALIDATE(100);' command frequently to validate if the stage data integrity
F. Create an external table with 'AUTO REFRESH = TRUE' and use schema evolution features to automatically detect and accommodate new columns in the Parquet files. use parameter to tune query performance.
正解：A、E、F
解説：
'AUTO REFRESH = TRUE' handles schema evolution in external tables. Materialized views on the top of external tables provides precomputed data, which is good for aggregations. The VALIDATE command allows analysts to check the stage data integrity and avoid errors in the data pipeline. Ingesting all data into a single VARIANT column is not efficient for aggregations and joins. Extracting to temporary tables is not maintainable. Periodically creating new tables is complex to manage. Adjusting can help improve performance.
質問 # 51
A financial institution has implemented both Row Access Policies and Dynamic Data Masking. The Row Access Policy restricts access to transaction data based on the user's department (e.g., 'Fraud Detection', 'Compliance'). Dynamic Data Masking is applied to the 'ACCOUNT NUMBER column, masking all but the last four digits. The institution wants to build a report that shows the distribution of transaction amounts across different departments. Analysts in the 'Compliance' department need to be able to see the full, unmasked 'ACCOUNT NUMBER when investigating potential regulatory violations for transactions within their department only , while still adhering to the Row Access Policy. Which of the following approaches is the MOST secure and compliant way to implement this?
A. Create a custom role hierarchy. Create a role specifically for the 'Compliance' department that inherits from the existing role used by the Row Access Policy. Create a data masking policy based on this new role that unmasks the 'ACCOUNT NUMBER. Grant access to the report to this new role.
B. Create a stored procedure that executes with 'CALLER rights. Within the stored procedure, use a Snowflake Scripting block to check the user's role and department affiliation. If the user is in 'Compliance' and the transaction is within their department, retrieve the unmasked 'ACCOUNT_NUMBER directly from the underlying table; otherwise, retrieve the masked value. Grant the 'Compliance' role execute privilege on the stored procedure.
C. Create a view that joins the TRANSACTIONS' table with a 'DEPARTMENT_ACCESS' table, which contains mappings between departments and account numbers. Grant the 'Compliance' role 'SELECT' privilege on this view. The view will inherit the masking policy and row access policies, restricting data based on department and masking the account number for all departments except Compliance.
D. Modify the Dynamic Data Masking policy on the ' ACCOUNT_NUMBER' column to include a CASE statement that checks if the current user's role is 'Compliance' AND if the Row Access Policy allows access to the relevant department. If both conditions are true, the policy returns the unmasked 'ACCOUNT_NUMBER; otherwise, it applies the masking.
E. Grant the 'Compliance' role the global 'UNMASK' privilege. This will bypass the dynamic data masking policy on the 'ACCOUNT_NUMBER column whenever a Compliance user queries the 'TRANSACTIONS' table, while still respecting the Row Access Policy.
正解：D
解説：
Option B is the most secure and compliant solution. By modifying the Dynamic Data Masking policy to include a CASE statement, you can conditionally unmask the 'ACCOUNT_NUMBER only when both the user is in the 'Compliance' department AND the Row Access Policy grants them access to the relevant transaction data. This ensures that the masking policy is only bypassed when absolutely necessary and that the Row Access Policy remains in effect. Option E is problematic because the UNMASK privilege is too broad and bypasses masking on all tables and columns. Using caller rights (option C) bypasses Row Access Policies too. Role hierarchies don't inherently affect masking. They change object privileges. Option A allows inheritance of the roles that the user is executing, however in the current context, the user will still get blocked due to ROW level security policy.
質問 # 52
In what ways do materialized views enhance performance in data analysis compared to regular views?
A. They restrict data accessibility for improved security.
B. Materialized views provide precomputed snapshots, reducing query computation.
C. Regular views simplify complex data structures more effectively.
D. Materialized views offer real-time updates, unlike regular views.
正解：B
解説：
Materialized views provide precomputed snapshots, improving query performance by reducing computation.
