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Huawei HCIP-Big Data Developer Sample Questions:

1. In Spark, assuming that lines is a DStream object, which of the following statements can periodically count the number of words on this stream?

A) Iines.flatMap(_.split (" " )).flatMap(word => (word, 1)).groupByKey(_ +_).print()
B) Iines.flatMap(_.split (" " )).map(word => (word, 1)).reduce(_ +_).print()
C) Iines.flatMap(_.split (" " )).map(word => (word,word.Iength())).reduceByKey (_ +_).print()
D) Iines.fIatMap(_.spIit (" " )).map(word => (word, 1)).reduceByKey(_ +_).print()

2. In Streaming application development, which interface does Bolt use to send Tuples?

A) nextTuple
B) execute
C) emit
D) open

3. When HDFS is running, the NameNode will load all the metadata of the file system from the disk to the memory. Therefore, the total number of files that the file system can store is limited by the memory capacity of the NameNode.

A) True
B) False

4. Which of the following is not a feature of MapReduce?

A) High fault tolerance
B) Real-time calculation
C) Easy to program
D) Good scalability

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

A) Sort and merge the results of the map stage
B) Combine the results of all map stages to get the final result
C) 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
D) Combine key-value pairs with the same key value in the result of the map phase

Solutions: