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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Transformations and DataFrame Operations | 35% | - Window functions - Using built-in functions - Complex data pipelines - Filtering, Aggregating, and Joining DataFrames - Persisting transformed data |
| Topic 2: Performance Optimization and Best Practices | 20% | - Minimizing data transfer - Caching strategies - Vectorized UDFs - Query pushdown and optimization - Debugging and explain plans - Warehouse sizing for Snowpark |
| Topic 3: Snowpark Concepts | 15% | - Transformations vs. Actions - Snowpark architecture and core concepts - Snowpark DataFrames and query plans - Snowpark Sessions and connection management - Stored procedures and conditional logic - Client-side vs. Server-side execution |
| Topic 4: Snowpark API for Python | 30% | - DataFrame creation and manipulation - Working with Semi-structured data - User-Defined Functions (UDFs) and Stored Procedures - Reading and writing data - Establishing connections and session management |
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NEW QUESTION # 263
You have a Snowpark Python stored procedure 'process_data' that takes a Snowpark DataFrame as input, performs several data transformations using functions defined in a separate Python module 'data utils.py', and returns a transformed DataFrame. The 'data utils.py' file is located in your local directory. You want to register this stored procedure so that it can be called from Snowflake. Which of the following code snippets demonstrate(s) the correct way to register the stored procedure, ensuring that the 'data utils.py' module is available within the Snowpark environment? (Select TWO)
Answer: B,E
Explanation:
Option C correctly specifies the 'data_utils.py' file in the 'imports' parameter of the gsproc' decorator, making it available within the Snowpark environment. It also includes re-importing the 'data_utilS package within the function. Option D specifies the file in the 'imports parameter and uses the '_import_' function to load and use the module, which is a valid approach. Option A would error at runtime because "data_utils' won't be found unless it is in the same file as the stored procedure definition or the user has installed the python packages. Option B contains incorrect usage of 'return_type', and and doesn't account for importing 'data_utils.pV. Option E has the same problem as A as the dependent file 'data_utils.py' has not been imported. The 'stage_location' parameter specifies the stage where the Python file should be uploaded. The two correct ways ensure that the data_utils module will be loaded and accessible in the Snowpark environment.
NEW QUESTION # 264
You have a Snowpark DataFrame 'df that you want to persist as a Snowflake table. You need to ensure the following requirements are met: 1. The table should be created if it does not exist. 2. If the table exists, the new data should be merged with the existing data based on a 'primary_key' column. 3. If a row with a matching 'primary_key' already exists in the target table, update the existing row with the values from the 'df DataFrame. Otherwise, insert the row from 'df into the target table. Which of the following approaches can achieve this using Snowpark?
Answer: A,D
Explanation:
Options C and D are the correct answers. Snowpark's method does not directly support a merge operation. To achieve this, you typically need to use one of the following approaches: Create a stored procedure that executes a Snowflake MERGE statement. This allows you to perform the merge operation server-side within Snowflake using SQL. This stored procedure can then be called from the Snowpark application. Stage your dataframe in to a new table, then create merge statement to handle the rest. Option A is incorrect because Snowpark does not have a option for Option B is possible but very inefficient, it requires reading all of the existing data in the table. Option E is inefficient because converting DataFrame to Pandas will add another performance bottleneck when dealing with large datasets.
NEW QUESTION # 265
You are developing a Snowpark application that uses a UDTF written in Python to perform complex data transformations. The UDTF takes several input columns and returns multiple output columns. The data volume is very large. You observe performance bottlenecks during the UDTF execution. Which of the following strategies could you employ to optimize the performance of your UDTF? (Select TWO)
Answer: D,E
Explanation:
Vectorized operations (B) allow the UDTF to process data in batches, significantly improving performance for large datasets. Increasing the warehouse size (C) provides more computational resources (CPU and memory) which directly benefit UDTF execution. Using scalar UDF is NOT a performance improvement strategy.
NEW QUESTION # 266
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: B,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 # 267
You need to perform a set difference operation between two DataFrames in Snowpark Python. 'dfl' contains customer IDs from a marketing campaign, and 'df2 contains customer IDs from a recent purchase event. You want to identify customers who were targeted in the campaign but did not make a recent purchase. Both DataFrames have a column named 'customer id'. Which of the following approaches provides the most efficient way to accomplish this task in Snowpark?
Answer: D
Explanation:
Option C, using a 'left_anti' join, is the most efficient way to perform a set difference operation between two DataFrames in Snowpark. A join returns only the rows from the left DataFrame Cdfl s) where the join condition is not met in the right DataFrame Cdf2). This leverages Snowflake's query optimizer for optimal performance. Option A, 'subtract(df2)' , is equivalent to 'exceptAll(df2)' (Option B) and removes duplicate rows. While functionally correct, join is often more performant, especially for larger datasets. Option D is highly inefficient as it collects the 'customer_id' from 'df2 to the driver, it should be avoided. Option E calculates intersection, not difference.
NEW QUESTION # 268
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