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Updated: Jul 05, 2026
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Cloudera CDP Data Engineer - Certification Sample Questions:
1. Why is it recommended to use the DataFrame API over RDDs for most data processing tasks in Spark?
A) DataFrames require less memory and compute resources compared to RDDs.
B) DataFrames automatically optimize queries using the Catalyst optimizer and Tungsten execution engine.
C) DataFrames provide more fine-grained control over partitioning and parallelism.
D) RDDs are deprecated and will be removed in future versions of Spark.
2. Your Airflow DAG includes data quality checks that involve comparing data against predefined thresholds or reference datasets. How can you handle potential failures during these checks and ensure the pipeline doesn't proceed with unreliable data?
A) All of the above
B) Use the BranchPythonOperator to check the success of the data quality checks and conditionally branch the DAG execution based on the outcome.
C) Implement custom logic within the PythonOperator to raise exceptions upon failed checks and trigger downstream tasks to handle the error.
D) Configure the DAG to automatically retry failed tasks associated with the data quality checks.
3. What is the role of a Spark driver in a distributed processing job?
A) Manages communication between executors and workers
B) Stores and processes intermediate data
C) Performs computations on individual data partitions
D) Coordinates tasks across the cluster
4. In the context of Hive, what mechanism ensures that data is evenly distributed across buckets?
A) Manual data insertion scripts
B) A hash function applied to the bucketing column
C) Natural key distribution
D) External data balancing tools
5. You need to design your Airflow DAG for data quality checks to be scalable and manageable as the number of datasets and checks grows. How can you achieve this?
A) Leverage external configuration files (e.g., YAML or JSON) to define data quality checks and associated parameters.
B) Implement a modular design using sub-DAGs, where each sub-DAG encapsulates the data quality checks for a specific dataset.
C) Hardcode all data quality checks and data sources directly within the DAG code.
D) Utilize Airflow variables to store configuration details like data source paths and check thresholds.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A,B | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: A,B |
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