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Cloudera CDP-3002 Exam Syllabus Topics:

SectionObjectives
Topic 1: Data Ingestion and Integration- Batch and streaming ingestion
  • 1. Data ingestion patterns in CDP
    • 2. Apache NiFi / Kafka ingestion concepts
      - Data movement and pipelines
      • 1. ETL/ELT workflows
        • 2. Data flow orchestration
          Topic 2: Platform Operations- Cluster and workload management
          • 1. Monitoring and troubleshooting
            • 2. Resource management and scheduling
              Topic 3: Data Storage and Modeling- Data modeling
              • 1. Dimensional modeling concepts
                • 2. Schema design for analytics
                  - Data lake architecture
                  • 1. Partitioning and file formats (Parquet, ORC)
                    • 2. HDFS / cloud object storage concepts
                      Topic 4: Data Governance and Security- Security frameworks
                      • 1. Ranger / Sentry policies
                        • 2. Authentication and authorization in CDP
                          - Data governance
                          • 1. Metadata management
                            • 2. Data lineage and auditing
                              Topic 5: Data Processing and Transformation- Spark processing
                              • 1. Distributed processing concepts
                                • 2. Spark SQL and DataFrames
                                  - SQL analytics engines
                                  • 1. Data transformation best practices
                                    • 2. Hive / Impala query optimization

                                      Cloudera CDP Data Engineer - Certification Sample Questions:

                                      You need to design a DAG that can be easily triggered based on external events or data availability. How can you achieve this functionality?

                                      • A. Schedule the DAG to run continuously at a fixed interval.
                                      • B. Implement custom code within the DAG to actively check for external events or data availability.
                                      • C. Rely on manual intervention to trigger the DAG whenever necessary.
                                      • D. Utilize Airflow sensors like FileSensor or S3KeySensor to wait for specific conditions before triggering the DAG.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: D  🗳️

                                      You're tasked with optimizing an existing Airflow DAG that processes large datasets daily. The DAG has multiple tasks, some of which frequently fail due to memory constraints on the worker nodes. Which approach would best mitigate this issue without upgrading hardware?

                                      • A. Split the DAG into multiple smaller DAGs to reduce the load on workers.
                                      • B. Use the Pool feature to limit the number of concurrent memory-intensive tasks.
                                      • C. Increase the priority_weight of memory-intensive tasks to ensure they run first.
                                      • D. Implement the Retry operator to automatically retry failed tasks.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B  🗳️

                                      Explanation: Only visible for Actual4dump members. You can sign-up / login (it's free).

                                      You encounter an error during a data quality check within your Airflow DAG. How can you access detailed information about the error to aid in troubleshooting?

                                      • A. You can directly inspect the custom Python script used for the check to identify potential issues.
                                      • B. All of the above
                                      • C. The Airflow web UI task details page might display error messages related to the failed check.
                                      • D. The Airflow logs (scheduler, worker) might contain relevant error messages from the failing task.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B  🗳️

                                      Explanation: Only visible for Actual4dump members. You can sign-up / login (it's free).

                                      What is the significance of "Sort Merge Join" appearing in an Explain Plan in Cloudera's SQL engines?

                                      • A. It signifies that the join operation is performed by sorting and then merging two datasets, which can be efficient for large, sorted datasets
                                      • B. It indicates that the query will benefit from additional indexes
                                      • C. It suggests that the join operation is performed without sorting, leading to faster execution
                                      • D. It is the least preferred join method due to its high CPU usage
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A  🗳️

                                      Explanation: Only visible for Actual4dump members. You can sign-up / login (it's free).

                                      When leveraging caching in Spark, which scenario illustrates the use of the MEMORY ONLY SER storage level most effectively?

                                      • A. Caching small, static datasets used in lookup operations.
                                      • B. Caching large datasets that do not fit into memory when stored in deserialized form.
                                      • C. Caching datasets that are frequently accessed and modified.
                                      • D. Caching datasets that require fast, sequential access without the need for serialization.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B  🗳️

                                      Explanation: Only visible for Actual4dump members. You can sign-up / login (it's free).

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