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Cloudera CDP Data Engineer - Certification Exam Sample Questions (Q317-Q322):
NEW QUESTION # 317
You are setting up a high-availability Spark cluster and need to configure the master node for recovery using ZooKeeper.
Which configuration should be added to the 'spark-defaults.conf' file?
Answer: A
Explanation:
The 'spark.deploy.recoveryMode ZOOKEEPER configuration in the 'spark-defaults.conf' file specifies that ZooKeeper will be used for recovery mode in a high-availability setup of Spark. This is essential for enabling the Spark cluster to recover from master node failures.
NEW QUESTION # 318
How can you use Apache Airflow to ensure a data quality check stops the workflow if it fails, without failing subsequent tasks that are not dependent on the data quality check?
Answer: C
Explanation:
The ShortCircuitOperator in Apache Airflow allows a task to conditionally skip following tasks in the workflow based on a condition. If the data quality check fails (i.e., the condition returns FalsE. , subsequent tasks directly dependent on it will be skipped, but it will not affect other parts of the workflow that do not depend on this check.
NEW QUESTION # 319
You are writing a PySpark application where you need to collect the final results from various Executors and present them to the user. Which aspect of the Spark Driver's role is primarily involved in this process?
Answer: B
Explanation:
The Spark Driver's role includes collecting the final results of the tasks executed by the Executors. In this scenario, where the PySpark application requires gathering and presenting results, the Driver compiles data from various Executors and provides the final output, fulfilling its responsibility in result collection and output generation.
NEW QUESTION # 320
You're using Iceberg for streaming data ingestion. A critical use case requires exactly-once processing guarantees. Which considerations are most important for achieving this? (Choose two)
Answer: D,E
Explanation:
A). Iceberg transactions are key for exactly-once guarantees within the table itself.
B). The streaming source needs to cooperate to ensure no duplicate or missing data even with retries.
C). Data format has little impact on exactly-once; it's more about source reliability.
D). Snapshot isolation is desirable and unrelated to exactly-once.
E). CDC can be part of the solution but doesn't guarantee exactly-once on its own.
NEW QUESTION # 321
Which feature of Apache Avro facilitates dynamic schema inference during data serialization and deserialization?
Answer: D
Explanation:
Apache Avro facilitates dynamic schema inference through the embedding of schemas within data files. This feature allows each data file to carry its schema, enabling seamless serialization and deserialization processes without the need for external schema definitions. The embedded schema ensures that the data structure is always known, simplifying data processing and integration tasks.
NEW QUESTION # 322
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