Free Access to Huawei.H13-723.v2022-07-05.q53 with Valid Practice Test (Page 5)

In the MapReduce development framework, what is the function of the InputFormat class?

A.Combine key-value pairs with the same key value in the result of the map phase
B.Combine the results of all map stages to get the final result
C.Sort and merge the results of the map stage
D.Split the input data into individual splits, and further split the split into <key, value> pairs, which are then used as the input of the map function

HDFS is not suitable for which of the following business scenarios?

In Spark application development, which of the following codes can correctly count words?

A.val counts = textFile.map (line => line.split ("')).map (-rd => (word, 1)).reduceByKey(_ +_)
B.val counts = textFile.flatMap (line=>line.split (" ")).map (word => (word, 1)).groupByKey ()
C.val counts = textFile.flatMap (line=>line.split (" ")).map (word => (word, 1)).reduceByKey(_ +_)
D.val counts = textFile.map (line=>line.split (" ")).map (word => (word, 1)).groupByKey ()

When adding a RegionServer host to an HBase cluster, you must stop the original cluster first, because HBase does not support dynamic expansion.

Regarding the disaster tolerance of Streaming, which of the following statements is correct? (multiple choice)

A.When a node fails, tasks on that node will be reassigned to other normal nodes without manual intervention.
B.Worker can be automatically pulled up by Supervisor after abnormal exit without manual intervention.
C.After the Supervisor process exits, it can be automatically recognized and pulled up by Nimbus without affecting the running business.
D.After Nimbus fails, the standby Nimbus will automatically take over, without affecting the running business.

Download PDF File