Online Access Free H13-723 Practice Test

In Kafka, which of the following commands can check how many partitions a topic has?

• A.kafka-topics.sh --alter
• B.kafka-topics.sh --create
• C.kafka-topics.sh --list
• D.kafka-topics.sh - describe

What are the several parameter setting methods for Spark applications? (multiple choices)

• A.Configure in the application configuration file spark-defaults.conf
• B.In the application code, set by the setProperty method of SparkContext
• C.When submitting the application, set it through --conf
• D.In the application code, set through the SparkConf object

In Spark, because DataFrame is a higher-level interface than RDD, the call level will be more. Therefore, the performance of all programs developed based on DataFrame will be worse than that of programs developed based on RDD.

• A.False
• B.True

As the core object of Spark, which of the following characteristics does RDD have? (multiple choice)

• A.Partition
• B.Read only
• C.Fault tolerance
• D.Efficient

In Spark, assuming that lines is a DStream object, the filter statement can filter out 80% of the data. Which statement is correct for the following two statements:
X: lines.filter(...).groupByKey(...)
Y: lines.groupByKey(...).filter(...)

• A.X and Y have the same performance
• B.X has lower performance than Y
• C.X has higher performance than Y
• D.It is impossible to determine the performance difference between X and Y