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Snowflake DAA-C01 Exam Syllabus Topics:

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

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Snowflake SnowPro Advanced: Data Analyst Certification Exam Sample Questions (Q24-Q29):

NEW QUESTION # 24
You are using a Snowflake Marketplace data feed that provides daily stock prices. The data is updated daily, and you need to create a process to automatically load the new data into your existing 'STOCK PRICES' table. The Marketplace data feed provides a view called 'MARKETPLACE STOCK PRICES' with columns 'DATE' (DATE), 'SYMBOL' (VARCHAR), and 'PRICE (NUMBER). Your 'STOCK PRICES' table has the same columns. Which of the following Snowflake features or techniques would be BEST suited for automatically loading the new data each day, ensuring that duplicate entries for the same 'DATE and 'SYMBOL' are avoided?

A. Create a Stream on the 'MARKETPLACE STOCK PRICES view, and then create a Snowflake Task that runs daily and processes the stream, inserting only new or changed data into the table. Schedule the Stream refresh frequency to once every day to match the new data feed frequency.
B. Create a Snowflake Task that runs daily and executes a simple 'INSERT INTO STOCK_PRICES SELECT FROM statement.
C. Create a Snowflake Task that runs daily and executes a 'MERGE statement to insert new data from into 'STOCK PRICES' , updating existing records if a match exists based on and 'SYMBOLS and inserting new records if there is no match. Also add a condition to remove the duplicate entries for the same 'DATE and ' SYMBOL'
D. Use Snowpipe Auto-Ingest with an external stage pointing to the Snowflake Marketplace data feed. Configure the pipe to copy new files from the Marketplace's internal stage to your table.
E. Create a Snowflake Pipe that automatically ingests data from the view into the 'STOCK_PRICES table whenever new data is available.

Answer: C

Explanation:
Option C is the most appropriate. A 'MERGE statement allows for both inserting new records and updating existing records based on a matching condition (in this case, and 'SYMBOL). This ensures that new data is added, and existing data can be updated if necessary. It also allows for handling potential duplicate scenarios. Option A will simply insert all data, leading to duplicates. Option B is not applicable as Snowpipe ingests from stages not views. Option D is incorrect as Snowpipe is designed for external stages, not internal Marketplace feeds. Option E, while a valid approach for change data capture, is more complex and unnecessary for a simple daily load, also the marketplace feeds don't support change data capture through Streams

NEW QUESTION # 25
When summarizing large data sets using Snowsight dashboards, how do they facilitate exploratory analysis?

A. They offer detailed textual summaries instead of visual representations.
B. Snowsight dashboards limit data representation options for large data sets.
C. They can't efficiently handle large data sets for summarization.
D. Snowsight dashboards provide visual representations aiding in quick comprehension.

Answer: D

Explanation:
Snowsight dashboards provide visual representations aiding in quick comprehension of large data sets.

NEW QUESTION # 26
You are creating a Snowsight dashboard to display the results of an A/B test on a website. You have the following tables: (columns: 'USER_ID', 'VARIANT' (VARCHAR, either 'A' or 'B'), 'CONVERSION' (BOOLEAN), 'TIMESTAMP') 'USER DEMOGRAPHICS' (columns: 'USER_ID, 'REGION', 'DEVICE) The stakeholders want to see the following visualizations: 1. Overall conversion rate for each variant. 2. Conversion rate for each variant broken down by region. 3. A table showing the statistical significance (p-value) of the difference in conversion rates between variants for each region, using a Chi-Square test. (Assume you have access to a stored procedure CHI SQUARE TEST(variant_a_conversions INT, variant_a_total INT, variant_b_conversions INT, variant b total INT) that returns the p-value.) Which combination of queries and Snowsight features will achieve the desired outcome with optimal performance and maintainability?

A. Create a stored procedure that takes 'start_date' and 'end_date' as parameters, performs all calculations (conversion rates and Chi-Square tests), and returns three result sets for the visualizations. Use the stored procedure as the data source for the Snowsight dashboard.
B. Create a task to aggregate the number of conversions and total views from the ab test data daily. Create views using the aggregated table to build the requested charts in Snowsight.
C. Create two views: 'VARIANT CONVERSION RATES': Calculates the overall and regional conversion rates. RESULTS': Executes for each region based on the view. Create three charts in Snowsight, using the views for the conversion rates and statistical significance table.
D. Create three separate charts using raw SQL queries for each visualizatiom Calculate the p-value outside of Snowflake using Python and load it into a new table. Use this new table to display a table chart with p-values.
E. Create a single view 'COMBINED_DATX that joins and ' USER_DEMOGRAPHICS'. Use this view in Snowsight to create all three charts. Use calculated fields in Snowsight to determine conversion rates and call the stored procedure for p-value within the calculated field.

Answer: C

Explanation:
Option B is the most efficient and maintainable. Creating two views allows for clean separation of concerns and reusability. 'VARIANT CONVERSION RATES pre-calculates the conversion rates, making the statistical significance calculation in cleaner and more performant. The resulting Snowsight dashboard is then simple to build using these views. Option A introduces unnecessary complexity by involving external tools (Python) and creating a new table. Option C attempts to do too much within Snowsight's calculated fields, which is not ideal for complex calculations like calling stored procedures. Option D might be performant, but makes the data presentation inflexible and ties the data to this specific dashboard. Option E is good to have the data aggregated, however it depends on option B to create the dashboard with the aggregated data.

NEW QUESTION # 27
You are tasked with loading data from an S3 bucket into a Snowflake table named 'SALES DATA'. The data is in CSV format, compressed with gzip, and contains a header row The S3 bucket requires AWS IAM role authentication. The 'SALES DATA' table already exists, and you want to use a named stage for this ingestion process. Which of the following steps are necessary to successfully load the data, minimizing administrative overhead?

A. Grant usage privilege on the storage integration to the role performing the data load. Ensure the user loading data has access to the Snowflake stage and the ' INSERT privilege on the table.
B. Create a Snowflake stage object that references the storage integration, the S3 bucket URL, and specifies the file format (CSV with gzip compression and header skip). Use the 'COPY INTO' command referencing the stage.
C. Ensure the S3 bucket has public read access; Snowflake's COPY INTO command will handle decompression and data loading without further configuration.
D. Create an external function to read the data from S3 and then insert it into the table, as Snowflake cannot directly read gzipped CSV files from S3.
E. Create a new IAM role in AWS with access to the S3 bucket, then create a Snowflake storage integration object referencing that role's ARN and the S3 bucket's URL.

Answer: A,B,E

Explanation:
Options A, B, and D are correct. Option A: Snowflake needs an IAM role and storage integration to access the S3 bucket securely. Option B: A stage object simplifies the COPY INTO command and handles file format details. Option D: Correct permissions are required for the data load to succeed. Option C is incorrect because Snowflake can directly read gzipped CSV files from S3 when configured correctly. Option E is incorrect because granting public read access to the S3 bucket is a security risk and is not the best practice; using IAM roles provides controlled and secure access.

NEW QUESTION # 28
You are tasked with cleaning and transforming a dataset containing customer information in Snowflake. This dataset includes columns such as 'CUSTOMER ID, 'NAME', 'EMAIL', 'PHONE NUMBER', and 'ADDRESS'. Your goal is to implement several data quality rules: 1) Ensure all phone numbers are in a consistent '+1-XXX-XXX-XXXX' format (where X is a digit). 2) Remove any leading or trailing whitespace from the 'NAME and 'ADDRESS' columns. 3) Replace invalid email addresses (identified by failing a specific regex pattern) with NULL. Which combination of Snowflake SQL statements would efficiently and accurately address these requirements?

Answer: B

Explanation:
Option D correctly addresses all requirements by performing all transformations within a single CREATE OR REPLACE TABLE statement. This ensures atomicity and avoids multiple update operations. It correctly trims NAME and ADDRESS, replaces invalid emails with NULL, and formats phone numbers if they have exactly 10 digits after removing non-numeric characters, otherwise assigning NULL. The correct option must format phone number as well as replace with NULL, while not replacing with NULL would mean keep original. Option E keeps original value not NULL, if phone number doesn't match criteria.

NEW QUESTION # 29
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