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Cloudera CDP Data Engineer - Certification Exam Sample Questions (Q190-Q195):

NEW QUESTION # 190
In a PySpark application running on Kubernetes, if one of the Executors fails to execute a task due to a node failure, what action does the Spark Driver take?

A. It immediately shuts down the entire application.
B. It reschedules the task on a different Executor.
C. It requests Kubernetes to allocate more resources to the failed Executor.
D. It pauses the application until the failed Executor is back online.

Answer: B

Explanation:
When a task fails on an Executor, possibly due to a node failure, the Spark Driver's responsibility is to reschedule the task on a different Executor. This is part of the Driver's task monitoring and execution management duties, ensuring the application's continued execution despite individual task failures.

NEW QUESTION # 191
Consider the following code snippet:# Sample DataFrame (assuming it exists) df = spark.createDataFrame(...)
# Attempt to explode a nested array column (fix the error)
df_exploded = df.withColumn("items", F.explode(df["items"]))
df_exploded.show()
What is the error in this code, and how can it be fixed?

A. The error is attempting to modify the original DataFrame in-place. Fix: Use a separate variable to store the exploded DataFrame.
B. The error is using withColumn instead of a dedicated method for exploding arrays. Fix: Use df.withColumnExploded. (This function doesn't exist in Spark)
C. The error is missing parentheses around the column name in the explode function. Fix: F.explode(df("items"))
D. There is no error in the code snippet.

Answer: A

NEW QUESTION # 192
As a data engineer, you are working with PySpark to analyze data stored in an HDFS cluster. You need to read a CSV file into a Spark DataFrame. Which of the following code snippets correctly reads the data from HDFS into a DataFrame?

Answer: B

Explanation:
The correct way to read a CSV file from HDFS into a Spark DataFrame in PySpark is using 'spark.read.format("csv").load("hdfs:///path/to/data.csv")*. This method specifies the format as CSV and loads the file from the specified HDFS path.

NEW QUESTION # 193
When using Cloudera's Command Line Interface (CLI), which of the following tasks can be performed?

A. Modifying the source code of Cloudera Manager.
B. Only data ingestion tasks can be automated.
C. Cluster monitoring and diagnostics cannot be performed.
D. Managing users and setting permissions on HDFS.

Answer: D

Explanation:
Using Cloudera's CLI allows for a wide range of administrative tasks, including managing users and setting permissions on HDFS. This capability is crucial for maintaining security and governance within a big data environment, enabling administrators to efficiently manage access controls and permissions from the command line without the need for direct interaction with the Cloudera Manager UI.

NEW QUESTION # 194
You're given a DataFrame containing information about flights, including columns "origin", "destination", and "delay_minutes". How can you find the top 5 origin airports with the most delayed flights on average?

A. Leverage Spark SQL's RANK function along with windowing to identify top 5 origins
B. Use groupBy and avg on "delay_minutes", then sort by the average in descending order and limit to top 5
C. Use Spark's machine learning library (MLIiB. for ranking and classification
D. Implement a custom function to calculate average delays for each origin and then sort and filter

Answer: B

Explanation:
Option A provides a straightforward and efficient approach. Here's the code:top_delayed_origins_df = df.groupBy("origin").agg(avg("delay_minutes").alias("avg_delay")) sort("avg_delay", ascending=FalsE. .1imit(5) top_delayed_origins_df.show()

NEW QUESTION # 195
......

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Cloudera CDP-3002 Simulation Questions | New CDP-3002 Exam Pattern

New Cloudera CDP-3002 Exam Pattern, Valid Braindumps CDP-3002 Questions

Cloudera CDP Data Engineer - Certification Exam Sample Questions (Q190-Q195):

Free PDF Quiz Cloudera - CDP-3002 - CDP Data Engineer - Certification Exam Perfect Simulation Questions

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