Free Huawei H13-723 Exam Dumps Questions & Answers

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

Which of the following reasons will cause HDFS NameNode to enter safemode (safe read-only mode)? (multiple choice)

• A.  The number of lost blocks exceeds the threshold.
• B.  The damaged copy exceeds the threshold.
• C.  The missing copy exceeds the threshold.
• D.  The disk space where the metadata of the active and standby NameNodes reside is insufficient.

When writing MapReduce applications, which two interfaces usually need developers to implement?

• A.  combine and sort
• B.  map and reduce
• C.  map and combine
• D.  reduce and combine

In FusionInsight HD, which of the following scenarios does Streaming apply to? (multiple choice)

• A.  Offline log analysis
• B.  Traffic flow analysis
• C.  Streaming data monitoring
• D.  Real-time access statistics of the website

Regarding the Hive service of the FusionInsight HD platform and its WebHCat development interface, which of the following descriptions is incorrect?

• A.  Support REST-based query request
• B.  WebHCat provides external services based on HTTP and HTTPS protocols
• C.  The data format returned by WebHCat is XML
• D.  You can create tables, query and other operations through WebHCat