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Pass Guaranteed Quiz 2026 Cloudera Accurate CDP-3002: Latest CDP Data Engineer - Certification Exam Test SimulatorCloudera CDP-3002 preparation materials will be the good helper for your qualification certification. We are concentrating on providing high-quality authorized CDP-3002 study guide all over the world so that you can clear exam one time. As we all know, the preparation process for an exam is very laborious and time- consuming. We had to spare time to do other things to prepare for Cloudera CDP-3002 Exam, which delayed a lot of important things. Cloudera CDP Data Engineer - Certification Exam Sample Questions (Q145-Q150):NEW QUESTION # 145
Consider the following code snippet:# Sample DataFrame (assuming it exists) df = spark.createDataFrame(...)
# Attempt to add a new column with a case-when expression (fix the error) df = df.withColumn("category", F.when(df["price"] ] 100, "Expensive").otherwise("Cheap")) df.show() What is the error in this code, and how can it be fixed?
A. There is no error in the code snippet.
B. The error is attempting to modify the original DataFrame in-place. Fix: Use df.withColumn to create a new DataFrame with the added column.
C. The error is using the wrong syntax for case-when expressions. Fix: Use SQL-like syntax with CASE WHEN and END.
D. The error is missing parentheses around the conditions in the when function. Fix: F.when((df["price"] ] 100), "Expensive").otherwise("Cheap")
Answer: B
Explanation:
The error lies in attempting to modify the original DataFrame in-place. The correct approach is to use withColumn to create a new DataFrame with the added column, as shown in the fixed code:df = df.withColumn("category", ] 100, "Expensive").otherwise("Cheap"))
NEW QUESTION # 146
You're working with a large DAG that contains numerous tasks and complex dependencies. How can you improve the DAG's readability and maintainability?
A. Implement extensive logging within each task, regardless of its purpose, to capture detailed execution information.
B. Utilize comments sparingly within the DAG code, as the logic should be self-explanatory.
C. Use cryptic and abbreviated names for tasks and variables, assuming everyone understands the context.
D. Break down the DAG into smaller sub-DAGs with well-defined functionalities and clear naming conventions.
Answer: D
NEW QUESTION # 147
What is the role of an Operator in an Apache Airflow DAG?
A To schedule DAG runs based on time or external triggers
A. To monitor the execution of DAGs and provide notifications
B. To represent a single task or a step within a DAG
C. To store metadata and logs for tasks and DAGs
Answer: A
Explanation:
In Apache Airflow, an Operator represents a single task or a step within a DAG, defining what actually gets done by a task. Operators are the building blocks of a DAG, specifying the type of work that needs to be done, such as running a Python function, executing a SQL command, or transferring data.
NEW QUESTION # 148
In a Kubernetes environment, you want to restrict the communication to your Spark application pods to only allow traffic from pods in a specific namespace. Which Kubernetes feature would you use to implement this?
A. Network Policies
B. Service Mesh
C. StatefulSets
D. Deployments
Answer: A
Explanation:
Network Policies in Kubernetes are used to control the flow of traffic to and from pods. They can be configured to allow traffic from specific namespaces, thereby restricting access to the Spark application pods.
NEW QUESTION # 149
What are the potential challenges associated with schema inference in data processing pipelines?
A. Inaccuracies in inferred schemas leading to data processing errors
B. Increased storage costs for schema metadata
C. Handling complex nested structures and arrays
D. Performance overhead due to schema discovery
E. The need for manual schema updates
Answer: A,C,D
Explanation:
Schema inference can introduce performance overhead as the system needs to analyze the data to determine its structure. Inaccuracies in the inferred schema may occur, especially with complex data types or when the data does not follow a consistent format, leading to potential errors in data processing. Handling complex nested structures and arrays can also present challenges, as the inference mechanism must correctly identify these elements within the data.
NEW QUESTION # 150
......
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