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Cloudera CDP Data Engineer - Certification Sample Questions:
1. What is a potential drawback of improperly configured bucketing in Hive that could negate performance benefits?
A) Automatic conversion of bucketed tables to non-bucketed tables
B) Increased risk of data loss due to bucket corruption
C) Skewed data distribution leading to uneven load across nodes
D) Mandatory manual intervention for each query execution
2. Which of the following is a critical consideration when deciding between using a sort merge join and a shuffle hash join in a distributed data processing system like Spark?
A) The availability of secondary indexes on the join keys
B) The version of the Spark cluster being used
C) The relative size of the datasets and the available memory on each executor
D) The network latency between nodes in the cluster
3. Your ETL pipeline processes sensitive dat
a. How can you ensure data security within Airflow?
A) Use environment variables to store sensitive credentials for accessing data sources.
B) Grant everyone access to the Airflow web UI to monitor and manage the pipeline.
C) Implement encryption for sensitive data at rest and in transit.
D) Store passwords and other sensitive data directly within your Airflow code.
4. You're deploying your Airflow DAGs to a production environment. What are some key considerations for ensuring security and reliability?
A) Schedule DAG runs as frequently as possible to ensure real-time data processing.
B) Configure Airflow to run with high resource limits to handle unexpected spikes in workload.
C) Disable task logging to improve DAG execution performance.
D) Implement role-based access control (RBAC. to restrict access to sensitive DAGs and resources.
5. You're experimenting with Iceberg table formats (vl and v2). Which of the following statements is true regarding their differences?
A) V2 introduces mandatory partitioning, while V1 allows for unpartitioned tables.
B) V2 uses manifest lists instead of manifest files for tracking data files.
C) V2 supports new data types like UUIDs, which are unavailable in V1.
D) V2 tables are generally less performant than V1 tables due to added metadata overhead.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: C | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: B |
By Timothy
