SPS-C01学習指導、SPS-C01試験情報

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Snowflake SPS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Snowpark API and Development	30%	- Multi-language support 1. Java and Scala API basics 2. Environment setup and dependencies - Python API fundamentals 1. Data persistence and writing results 2. DataFrame creation from tables, views, SQL 3. Column operations and functions
Topic 2: Snowpark Concepts and Architecture	25%	- Snowpark architecture and execution model 1. Client-side vs server-side processing 2. Lazy evaluation and DAG execution 3. Transformations vs actions - Session management and connection 1. Authentication and connection settings 2. Create and configure Snowpark sessions
Topic 3: Data Transformations and Operations	35%	- Advanced operations 1. Window functions and analytics 2. Semi-structured data processing 3. Pivot and unpivot transformations - DataFrame manipulation 1. Filtering, sorting, grouping, aggregation 2. Selection, projection, renaming, casting 3. Joins, unions, set operations - User-defined logic 1. UDFs, UDAFs, UDTFs 2. Stored procedures with Snowpark
Topic 4: Performance and Best Practices	10%	- Security and governance 1. Access control and permissions 2. Data protection and compliance - Optimization techniques 1. Minimizing data movement 2. Query pushdown and execution plans 3. Caching and warehouse sizing

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Snowflake Certified SnowPro Specialty - Snowpark 認定 SPS-C01 試験問題 (Q188-Q193):

質問 # 188
You have a Snowpark DataFrame named 'orders_df with columns 'order_id', 'customer_id', 'order_date', and 'order_total'. You need to perform the following data enrichment steps using Snowpark for Python: 1. Calculate the 'year' from the 'order_date' column. 2. Calculate the 'discounted_total' by applying a discount of 10% if the 'order_total' is greater than $100, otherwise, no discount. 3. Create a new column 'customer_tier' based on the total spend per customer for each year. Customers with total spend greater than $1000 are 'Gold', between $500 and $1000 are 'Silver', and below $500 are 'Bronze'. Which of the following code snippets correctly implements these data enrichment steps using Snowpark (Assume the existence of a customer total spend df DataFrame).

正解：A

解説：
Option B is the most efficient and correct. It calculates 'year' and 'discounted_total' using built-in functions. It then groups by 'customer_id' and 'year' to calculate 'total_spend'. Critically, it then assigns the 'customer_tier' using a series of 'when' statements directly within Snowpark, avoiding the performance overhead of a UDE Finally, it joins the customer tier information back to the original 'orders df. Option A implements Customer Tier calculation using UDF, Option C introduces Windowing without need. Options D, E are incomplete.

質問 # 189
You have a Snowpark DataFrame with columns 'sale_date', 'product_id', and 'revenue'. You need to calculate the cumulative revenue for each product over time. Which of the following approaches will accomplish this in Snowpark using window functions?

正解：A、D

解説：
Options A and E both achieve the desired result of calculating cumulative revenue for each product. Option A utilizes 'rowsBetween' specifying that the window frame should include all rows from the beginning ('Window.unboundedPreceding') up to the current row ('Window.currentRow'). This calculates a running sum of revenue for each product over time. Option E uses 'rangeBetween' , which is equivalent to when the order-by expression is of a numeric or date type. Option B does not partition by product_id, so the cumulative revenue is calculated over the entire dataset. Option C does not include frame specification 'rowsBetween()' or 'rangeBetween(Y , therefore defaults to 'RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW, which is valid for this question. While it's functionally correct, it's implicit, so 'A' is preferrable if one option is to be selected. Option D partitions incorrectly by sale_date.

質問 # 190
You are developing a Snowpark stored procedure in Python that utilizes the 'requests' library to fetch data from an external API. Your Snowflake account is configured to use Anaconda packages. You encounter an error indicating that the 'requests' library is not found. Which of the following steps are MOST effective in ensuring the 'requests' library is available to your stored procedure?

A. Include the 'requests' library directly in the stored procedure code using a base64 encoded string.
B. Install the 'requestS library directly onto the Snowflake compute nodes using SnowSQL's command.
C. Manually upload the 'requests' library's ' .py' files to an internal stage and import them within the stored procedure.
D. Specify the 'requests library in the stored procedure's 'packages argument during creation: 'CREATE OR REPLACE PROCEDURE
E. Enable Anaconda integration for your Snowflake account, ensuring 'requests' is available in the Snowflake Anaconda channel, and then create the stored procedure using 'imports=['snowflake://packages/requests/']'.

正解：D

解説：
The 'packages' argument in the 'CREATE OR REPLACE PROCEDURE statement is the correct way to specify dependencies on Anaconda packages. Snowflake will automatically resolve and make these packages available to the stored procedure. Option B is incomplete; while Anaconda integration is necessary, it doesn't automatically import the library. Options A, C and E are incorrect and not best practices.

質問 # 191
You are tasked with processing a large number of PDF files stored in an external stage named Each PDF contains scanned receipts, and you need to extract the total amount from each receipt. You plan to use Snowpark Python, SnowflakeFile object, and an OCR (Optical Character Recognition) library for text extraction. Assuming you have already set up the connection and session, what is the most efficient and secure way to read and process these PDF files using Snowpark and SnowflakeFile, minimizing data transfer and maximizing parallelism?

A. Define an external function that takes the path to a file on the stage as input, performs OCR using a cloud-based OCR service and stores the result in an intermediate database table, then create a Snowpark DataFrame to query extracted amounts. Use 'session-read-option('PATTERN', ' to generate the initial DataFrame.
B. Use 'session.read.option('PATTERN', ' to load the PDF files as binary data into a Snowpark DataFrame. Then, define a UDF that takes the binary data as input, converts it to a 'SnowflakeFile' object within the UDF, performs OCR, and extracts the amount.
C. List all files in the stage using 'session.sql('LlST iterate through the results, create a 'SnowflakeFile' object for each file path, download each file using 'SnowflakeFile.get' into the client machine, perform OCR, extract the amount, and create a Snowpark DataFrame with the extracted amounts.
D. Read all PDF files into a Pandas DataFrame, then iterate through the DataFrame, downloading each file using 'SnowflakeFile.gef , perform OCR, extract the amount, and finally create a Snowpark DataFrame with the extracted amounts.
E. Create a UDF that accepts a 'SnowflakeFile' object as input, performs OCR and amount extraction inside the UDF, and then call this UDF on a Snowpark DataFrame representing the files in the stage. Use 'session.read.option('PATTERN', ' to generate the initial DataFrame.

正解：E

解説：
Option B is the most efficient and secure approach. By creating a UDF that accepts a 'SnowflakeFile' object, the OCR processing happens within the Snowflake environment, close to the data. This minimizes data transfer out of Snowflake, improving performance and security. Using 'session-read-option('PATTERN', ' (with a dummy CSV format) is a clever way to create an initial DataFrame with file metadata for the UDF to operate on. Option A is inefficient as it transfers all PDFs to the client machine for processing. Option C requires converting binary data back to SnowflakeFile object inside UDF, which is not the intended use and might introduce complexity. Option D is highly inefficient and insecure as it involves downloading all files to the client, defeating the purpose of Snowpark. Option E, while using a cloud-based OCR service, adds complexity and dependency to external services.

質問 # 192
You are developing a Snowpark application that processes real-time streaming data'. The application needs to perform a complex calculation for each incoming event. To improve performance, you decide to leverage asynchronous execution and User-Defined Functions (UDFs). However, you are encountering issues with the order of results and ensuring that the processing order matches the arrival order of the events. Which of the following strategies MOST effectively addresses the challenge of maintaining processing order while leveraging asynchronous execution and UDFs in Snowpark?

A. Use synchronous UDF calls with a large Snowflake warehouse to minimize processing time and guarantee order.
B. Employ asynchronous UDF calls with 'block-False' and rely on Snowflake's internal optimization to maintain the processing order.
C. Use synchronous UDF calls with a small Snowflake warehouse to introduce artificial delays and ensure order.
D. Utilize asynchronous UDF calls with 'block-False' and implement a custom ordering mechanism based on a timestamp or sequence number associated with each event. Store the results in a temporary table and sort them based on the timestamp before further processing.
E. Abandon the use of UDFs altogether and reimplement the complex calculation using only built-in Snowpark DataFrame transformations to ensure order.

正解：D

解説：
Asynchronous execution, by definition, doesn't guarantee the order of completion. To maintain order, a custom ordering mechanism based on a timestamp or sequence number is necessary. Storing the results in a temporary table and sorting them before further processing is a viable approach. Synchronous calls (A, D) negate the benefits of asynchronous execution. Snowflake's internal optimization (C) doesn't guarantee order in asynchronous scenarios. Reimplementing the calculation without UDFs (E) might not be feasible or efficient if the calculation is complex. The 'block' parameter is relevant to asynchronous behaviour and must be False' to truly utilize the asynchronous execution model. The UDFs will be executed asynchronously, and the order is maintained by using Timestamp.

質問 # 193
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