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Cloudera CDP-3002 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Data Storage and Modeling | - Data modeling
|
| Data Processing and Transformation | - Spark processing
|
| Platform Operations | - Cluster and workload management
|
| Data Ingestion and Integration | - Batch and streaming ingestion
|
| Data Governance and Security | - Security frameworks
|
Cloudera CDP Data Engineer - Certification Sample Questions:
In the context of Spark SQL, what does the Catalyst optimizer use to optimize queries?
- A. A rule-based optimization model that applies predefined rules to simplify queries
- B. Machine learning algorithms to predict the fastest query execution plan
- C. A cost-based optimization model that considers the size of intermediate data
Correct Answer: A,C 🗳️
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Considering the dynamic nature of data workloads, how can Spark's dynamic resource allocation feature impact caching strategies?
- A. By potentially evicting cached data when executors are removed due to reduced workload, affecting performance.
- B. By increasing the memory available for caching as the data workload increases, without manual intervention.
- C. By automatically persisting all cached data to disk to prevent data loss during node decommissioning.
- D. By encrypting cached data to enhance security when reallocating resources dynamically.
Correct Answer: A 🗳️
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What does setting the Spark configuration parameter 'spark.sql.shuffle.partitions' impact?
A The default level of parallelism for joins and aggregations
- A. The compression codec used for shuffle files
- B. The memory allocation for executor instances
- C. The serialization format of data
Correct Answer: C 🗳️
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When using Apache Airflow to schedule quality checks, which strategy helps ensure that checks are only run on the most recent data partition?
A Use the LatestOnlyOperator to skip tasks that are not the latest in a series of executions.
- A. Utilize the execution_date in your SQL query to target the latest partition.
- B. Implement a custom PythonOperator that queries the database for the latest partition.
- C. Apply the depends_on_past=True parameter to the quality check task.
Correct Answer: A 🗳️
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Which feature in Apache Airflow allows you to retry a data quality check task if it fails initially due to transient issues?
- A. Branching
- B. retries parameter in the task definition
- C. catchup
- D. SLAs
Correct Answer: B 🗳️
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