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Cloudera CDP Data Engineer - Certification Sample Questions:

1. What command and parameters should be used to update an existing Spark job in the Cloudera Data Engineering (CDE. service to increase its executor memory using the CDE CLI?

A) cde spark submit -update -name my-spark-job -executor-memory 6G
B) cde job update -name my-spark-job --conf spark.executor.memory=6g
C) cde job config -name my-spark-job -set spark.executor.memory=6g
D) cde job run -edit my-spark-job -conf spark.executor.memory=6g

2. Which feature in Apache Airflow allows you to retry a data quality check task if it fails initially due to transient issues?

A) SLAs
B) retries parameter in the task definition
C) Branching
D) catchup

3. What is the impact of setting the Spark configuration spark.sql.autoBroadcastJoinThreshold to -1?

A) It disables the broadcast join feature, forcing all joins to be shuffled joins.
B) It increases the threshold for choosing which table to broadcast in a join, potentially improving join performance.
C) It automatically selects the optimal threshold for broadcasting based on the cluster's current workload.
D) It sets an unlimited threshold for broadcasting tables, which may cause out-of-memory errors.

4. A colleague proposes using Iceberg's optimistic locking feature for a high-concurrency scenario where multiple jobs frequently modify the same table. What potential issues should you raise?

A) Iceberg's optimistic locking requires manual conflict resolution.
B) Iceberg's optimistic locking isn't suitable for distributed environments like CDP.
C) Optimistic locking in Iceberg introduces a significant performance overhead.
D) Optimistic locking might result in many failed transactions and retries, potentially leading to job instability.

5. What benefit does bucketing provide for join operations in Hive?

A) It can reduce the cost of joins by enabling map-side joins.
B) It allows for the join condition to be omitted in queries.
C) It enables cross-database joins by default.
D) It ensures data privacy by encrypting join keys.

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