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Exam CDP-3002 Revision Plan | CDP-3002 Trustworthy Pdf

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Cloudera CDP Data Engineer - Certification Exam Sample Questions (Q168-Q173):

NEW QUESTION # 168
You're implementing a data quality process for Iceberg tables in CDP Which of the following Iceberg features can help you enforce constraints and detect data anomalies? (Choose two)

  • A. Metadata tables
  • B. Iceberg table constraints (not yet fully supporteD.
  • C. Snapshots
  • D. Manifest files
  • E. Partitioning

Answer: A,D


NEW QUESTION # 169
When deploying a Spark application on Cloudera Data Engineering (CDE. service managed on Kubernetes, which command would you use to specify resource requirements such as CPU and memory for the Spark executor?

  • A.
  • B.
  • C.
  • D.

Answer: C

Explanation:
When deploying a Spark application on CDE service, which is managed on Kubernetes, you would typically use the CDE CLI to submit and configure your Spark jobs. The correct command would involve the cde spark submit command along with -conf flags to specify configuration options such as executor memory and cores. This approach is tailored to the CDE environment, leveraging its CLI for configuration rather than directly interfacing with Kubernetes (kubectl) or using the generic spark-submit command.


NEW QUESTION # 170
For improving join performance, why is it recommended to filter data before joining tables in Apache Spark?

  • A. To prepare data for broadcast joins irrespective of size
  • B. To increase the amount of data being shuffled
  • C. To reduce the volume of data processed during the join
  • D. To enforce strict data typing across joined datasets

Answer: C

Explanation:
Filtering data before joining tables can significantly improve join performance by reducing the volume of data that needs to be processed. This approach minimizes the amount of data shuffled across the network and reduces the computational resources required for the join operation, leading to faster execution times.


NEW QUESTION # 171
You encounter an error message stating "Schema mismatch" when joining two DataFrames in Spark. What could be the potential causes and how can you resolve them?

  • A. The join condition references non-existent columns in one of the DataFrames
  • B. All of the above
  • C. The DataFrames have the same column names but different data types
  • D. The DataFrames have different column names but the same data types

Answer: B

Explanation:
All listed options can lead to schema mismatch errors during joins. Option A might seem compatible but can still cause issues. Option B is a common cause. Option C occurs when referencing incorrect columns in the join condition. Carefully examining the schemas of both DataFrames and ensuring compatibility is crucial to avoid schema mismatches.


NEW QUESTION # 172
Given a DataFrame containing product information with columns "product_id", "name", and "price", how can you filter and sort the DataFrame to only include products with a price greater than $50 and sort them by price in descending order?

  • A. Implement a custom function to filter and sort the data
  • B. Use spark SQL's WHERE clause and ORDER BY statement
  • C. Leverage chained conditions and sorting within the filter method
  • D. Use multiple filter and sort calls sequentially

Answer: C

Explanation:
Chaining conditions within the filter method allows for concise and efficient filtering. Option B demonstrates this approach:filtered_sorted_df = ] 50).sort("price", ascending=FalsE.
This code first filters the DataFrame to only include rows where the "price" is greater than 50 and then sorts the resulting DataFrame by the "price" column in descending order (using ascending=FalsE.


NEW QUESTION # 173
......

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