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[Hardware] Pass Guaranteed Cloudera First-grade CDP-3002 - Test CDP Data Engineer - Certifi

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【Hardware】 Pass Guaranteed Cloudera First-grade CDP-3002 - Test CDP Data Engineer - Certifi

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Cloudera CDP Data Engineer - Certification Exam Sample Questions (Q47-Q52):NEW QUESTION # 47
In Apache Airflow, which strategy allows for the dynamic generation of tasks within a DAG based on external data sources, such as a list of database tables?
  • A. Using the Variable class to store and retrieve the list of tables
  • B. Utilizing the @dag decorator with dynamic input parameters
  • C. Implementing a PythonOperator that generates other tasks at runtime
  • D. Employing the TaskFlow API with dynamic task mapping
Answer: D
Explanation:
The TaskFlow API in Apache Airflow, particularly with its dynamic task mapping feature, allows for the creation of tasks dynamically based on external inputs, such as a list from a database query. This approach simplifies the process of generating tasks based on varying inputs, making DAGs more flexible and adaptable to changes in external data sources.

NEW QUESTION # 48
You have a DataFrame containing sales data with columns "product_id", "customer id", and "amount". How can you efficiently calculate the total sales per customer?
  • A. Implement a custom function to group and sum the sales
  • B. Utilize spark SQL's GROUP BY and SUM functions
  • C. Leverage Spark's machine learning library (MLIiB. for aggregation
  • D. Use a loop to iterate through the DataFrame and accumulate the sales for each customer
Answer: B
Explanation:
Option B provides the most efficient and concise way to achieve this.

NEW QUESTION # 49
Which tool or API is primarily used for monitoring and inspecting the performance of Spark applications in real-time?
  • A. Hadoop YARN ResourceManager UI
  • B. spark Web UI
  • C. Spark History Server
  • D. Apache Ambari
Answer: B
Explanation:
The Spark Web UI is a monitoring tool that provides information about the execution of a Spark application. It gives insights into the scheduler stages and tasks, executor usage, storage usage, and environmental settings. It is accessible while the application is running and is the primary tool for real-time performance monitoring. The Spark History Server helps in inspecting the application performance after it has completed. Hadoop YARN ResourceManager UI and Apache Ambari are more generally used for cluster management and monitoring, not specifically for real-time Spark application performance.

NEW QUESTION # 50
Which Airflow component is responsible for executing task instances in a distributed manner?
  • A. Executor
  • B. Worker
  • C. Scheduler
  • D. Webserver
Answer: A
Explanation:
The Executor in Apache Airflow is responsible for executing the tasks of a DAG. While the Scheduler decides when to run tasks based on their dependencies and schedule, the Executor actually runs the task code, potentially in a distributed manner across multiple workers.

NEW QUESTION # 51
You're deploying your Airflow DAGs to a production environment. What are some key considerations for ensuring security and reliability?
  • A. Disable task logging to improve DAG execution performance.
  • B. Configure Airflow to run with high resource limits to handle unexpected spikes in workload.
  • C. Implement role-based access control (RBAC. to restrict access to sensitive DAGs and resources.
  • D. Schedule DAG runs as frequently as possible to ensure real-time data processing.
Answer: C
Explanation:
Security is paramount in production environments. Option A highlights the importance of using RBAC to control access and prevent unauthorized modifications to DAGs. While resource allocation, logging, and scheduling are important aspects, option A addresses the critical security concern.

NEW QUESTION # 52
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