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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Snowpark API for Python | 30% | - Working with Semi-structured data - Establishing connections and session management - DataFrame creation and manipulation - User-Defined Functions (UDFs) and Stored Procedures - Reading and writing data |
| Topic 2: Performance Optimization and Best Practices | 20% | - Query pushdown and optimization - Debugging and explain plans - Warehouse sizing for Snowpark - Minimizing data transfer - Vectorized UDFs - Caching strategies |
| Topic 3: Data Transformations and DataFrame Operations | 35% | - Filtering, Aggregating, and Joining DataFrames - Using built-in functions - Window functions - Persisting transformed data - Complex data pipelines |
| Topic 4: Snowpark Concepts | 15% | - Client-side vs. Server-side execution - Snowpark DataFrames and query plans - Transformations vs. Actions - Snowpark Sessions and connection management - Stored procedures and conditional logic - Snowpark architecture and core concepts |
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NEW QUESTION # 78
Consider the following Snowpark Python code snippet:
Answer: A,C
Explanation:
Options A and D are correct. Snowpark leverages Snowflake's compute resources by translating DataFrame operations (like 'with_column' and 'upper') into SQL that is executed within the data warehouse. Only the 'collect()' action materializes the results and brings them back to the client. B is wrong because the upper function executes on the server side and is translated into SQL. C is wrong because collect happens at the end after 'upper' is calculated in Snowflake. E is incorrect as the core Snowpark functionality does not require a full Anaconda environment setup - dependencies can be configured otherwise.
NEW QUESTION # 79
You have a Snowpark DataFrame named 'employee_df with columns 'employee_id', 'department', and 'salary'. You want to calculate the average salary for each department and add it as a new column named 'avg_department_salary' to the original DataFrame. Additionally, you want to sort the resulting DataFrame by department and then by salary in descending order. Which of the following Snowpark code snippets correctly implements this requirement?
Answer: A,E
Explanation:
Option D and E are correct. Both implement the window function correctly to add the average salary per department as a new column and then sort the DataFrame as required. Option E is very close and just has the window partition defined with 'col('department')'. Option A is correct but uses sort. Option B is incorrect because it does not include the original columns other than department when grouping so will loose important data, and attempts to sort on a column that no longer exists.Option C uses 'avg('salary')' instead of avg(col('salary'))
NEW QUESTION # 80
You have a Snowpark DataFrame named 'employee_df in VS Code. You want to define a user-defined function (UDF) in Python that calculates the bonus for each employee based on their salary and performance rating. The UDF should take the salary (SALARY) and performance rating (PERFORMANCE RATING) as inputs and return the bonus amount. Assume you have already established a Snowpark session. Which code snippet accurately defines and registers a UDF named 'calculate_bonus' that can be applied to the 'employee_df DataFrame?
Answer: A,D
Explanation:
Options A and B are both correct methods. Option A defines the Python function and then registers it as a UDF using session.udf.register' . It explicitly specifies the return type, input types, UDF name, and the 'replace=True' option to allow overwriting if the UDF already exists. Option B uses the guff decorator to directly register the function as a UDF, providing a more concise way to define and register UDFs. Option A is also valid as the user defined datatypes and name. Option C requires the snowflake-snowpark-python package (which is already installed via dependencies) and the 'fune argument is redundant. Option D is wrong as would remove the currently configured packages. Option E is incorrect because making the UDF permanent requires additional privileges and setup that aren't covered by default.
NEW QUESTION # 81
You have a large CSV file containing product descriptions that you need to analyze using a sentiment analysis UDF. The CSV file is too large to fit in memory on your local machine. You want to stream the data directly from a Snowflake stage to your UDF for processing, avoiding the need to download the entire file. Which of the following approaches allows you to achieve this using Snowpark?
Answer: E
Explanation:
Option B is the correct approach. Creating an external table allows you to treat the CSV file on the stage as a regular table within Snowflake. You can then use a Snowpark DataFrame to query this external table and efficiently process the data in parallel using the sentiment analysis UDF. Option A is not feasible because you cannot directly load the file into Pandas, as it requires the file to be local to UDF execution environment, defeating the purpose of using a stage directly. Option C: is not intended for reading arbitrary files; it's typically used for Snowpipe ingestion. Option D introduces unnecessary data movement and complexity. Option E is discouraged due to security concems and potential resource conflicts; UDFs should not establish new connections to Snowflake.
NEW QUESTION # 82
A data engineering team is using Snowpark Python to build a data pipeline. They need to create a User-Defined Function (UDF) that transforms a JSON string column representing customer information into a STRUCT type containing flattened fields for 'name', 'age', and 'city'. The UDF should handle null values gracefully and return NULL if the input JSON is invalid or if the 'name' field is missing. Considering performance implications and error handling, which of the following approaches is MOST optimal for defining and registering this UDF?
Answer: A
Explanation:
Option B is the most optimal. Using allows Snowpark to understand the schema of the returned data, enabling efficient type checking and query optimization. 'snowflake.snowpark.functions.parse_json' leverages Snowflake's internal JSON parsing capabilities, leading to better performance. Returning None from UDF handles nulls gracefully. Other options either involve less efficient StringType return types, manual VARIANT object creation which is less type-safe, or suggest stored procedures when a simple UDF is sufficient.
NEW QUESTION # 83
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