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Cloudera CDP-3002 考試大綱主題:

最新的 Cloudera Certification CDP-3002 免費考試真題：

1. Your team is integrating PySpark with a MySQL database. You need to read data from a table named 'employees'. Which of the following PySpark code snippets correctly accomplishes this task?

A)

B)

C)

D)

2. How does the Cloudera Optimization Framework leverage columnar storage formats for query performance improvement?

A) By encrypting data stored in columnar formats
B) By allowing more efficient data scans and operations on compressed data
C) By reducing network traffic through columnar data replication
D) By enabling more efficient compression and encoding schemes

3. When performing a bucketed join between two tables, what must be true for the join to be executed as a map-side join, thereby maximizing performance?

A) Both tables must be bucketed on the join columns with a different number of buckets.
B) Both tables must be bucketed on the join columns with the same number of buckets and the same hash function.
C) Only one table needs to be bucketed, regardless of the bucket count.
D) Both tables must be partitioned, not bucketed, on the join columns.

4. You're deploying your Airflow DAGs to a production environment. What are some best practices to ensure reliability and maintainability?

A) Use the same Airflow environment for development, testing, and production deployments.
B) Implement version control for your DAG code and configuration files to track changes and facilitate rollbacks.
C) Schedule DAGs to run as frequently as possible to ensure real-time data processing.
D) Grant full access to the Airflow web UI to everyone for monitoring and troubleshooting purposes.

5. In optimizing join operations, what role does the Catalyst optimizer in Spark play, specifically regarding join strategies?

A) It exclusively uses broadcast join for all operations to minimize execution time.
B) It dynamically selects the most appropriate join strategy based on the query execution plan.
C) It manually requires the developer to specify the join strategy for each operation.
D) It disables all optimizations by default to provide consistent performance across different datasets.

問題與答案：