Apache Spark Certification Practice Test

Image Description

Question: 1 / 400

Every SparkContext launches a web UI on which port?

8080

4040

When a SparkContext is created in an Apache Spark application, it automatically starts a web UI to provide insights into the application's performance and resource utilization. By default, this web UI is accessible via port 4040. This UI allows users to monitor various aspects of their Spark jobs such as job execution time, stages, tasks, and other metrics, which are critical for diagnosing issues and optimizing performance.

While it is common for services like HTTP or certain applications to use port 8080, the standard for Spark's web UI is specifically set to port 4040. If multiple Spark applications are run sequentially on the same machine, subsequent applications will use ports 4041, 4042, and so forth to avoid conflicts. Thus, 4040 is a distinct and established convention for Spark applications, making it the correct choice in this context.

Get further explanation with Examzify DeepDiveBeta

5000

3000

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy