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NEW QUESTION 46
When the HDFS client writes files to HDFS with N copies, if one of the copies fails to write, all copies will return the write failure.
- A. False
- B. True
Answer: A
NEW QUESTION 47
In the V100R002C60 version of the FusionInsight HD system, Hive only supports query services based on the MapReduce engine, and does not support query services based on the Spark engine.
- A. False
- B. True
Answer: A
NEW QUESTION 48
In FusionInsight HD, regarding Oozie's job operation commands, which of the following descriptions are correct? (multiple choice)
- A. The run command can make the job status RUNNING
- B. The start command can make the job in the PREP state become RUNNING
- C. The kill command can be used on jobs in PREP/SUSPEND/RUNNING status
- D. The submit command can change the status of the job to PREP
Answer: A,B,C,D
NEW QUESTION 49
Suppose there is an application, there are 10 tables, each table has tens of millions of records, and the number of fields is about 20.
Now Redis is used to cache the data of these 10 tables. For the design of the data structure, which of the following is the best design?
- A. A hash structure is adopted, and a table uses a hash KEY, and a row in the table records a field for the hash KEY.
- B. Using string structure, each row of each table uses a KEY, and value is the concatenated value of all the fields in a row of the table.
- C. Using a hash structure, each row record of each table uses a hash KEY, the field of the hash KEY corresponds to the field of the table record, and each table is designed with a different prefix to distinguish it.
- D. Using string structure, each field in each row of each table uses a KEY.
Answer: C
NEW QUESTION 50
In FusionInsight HD, where can I view the running results of the MapReduce application?
- A. FusionInsight Manager web interface
- B. Yarn web interface
- C. Solr web interface
- D. Loader web interface
Answer: B
NEW QUESTION 51
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.fIatMap(_.spIit (" " )).map(word => (word, 1)).reduceByKey(_ +_).print()
- C. Iines.flatMap(_.split (" " )).map(word => (word, 1)).reduce(_ +_).print()
- D. Iines.flatMap(_.split (" " )).map(word => (word,word.Iength())).reduceByKey (_ +_).print()
Answer: B
NEW QUESTION 52
Oozie's workflow.xml file is a workflow configuration file
- A. False
- B. True
Answer: B
NEW QUESTION 53
What methods does FusionInsight HD support to submit Oozie jobs? (multiple choice)
- A. Java API
- B. Shell commands
- C. Hue UI
- D. Rest API
Answer: A,B,C,D
NEW QUESTION 54
Document is the main entity stored in the SolrColud cluster. It is the basic unit of indexing and query. It can contain one or more fields and is a set of data describing certain things. Each document must contain a uniqueKey field that can uniquely identify the document.
- A. False
- B. True
Answer: B
NEW QUESTION 55
In Spark, which statement about broadcast variables is correct?
- A. Broadcast variables are saved in each Task
- B. Broadcast variables are generated by the SparkContext.broadcast() method
- C. The broadcast variable is saved in each Executor
- D. Broadcast variables are read-only
Answer: B,C,D
NEW QUESTION 56
Regarding the Hive service of the FusionInsight HD platform and its WebHCat development interface, which of the following descriptions is incorrect?
- A. You can create tables, query and other operations through WebHCat
- B. Support REST-based query request
- C. The data format returned by WebHCat is XML
- D. WebHCat provides external services based on HTTP and HTTPS protocols
Answer: C
NEW QUESTION 57
In Spark, SparkSQL is an independent module, which can independently complete SQL statement parsing, optimization, and execution without relying on SparkCore.
- A. False
- B. True
Answer: A
NEW QUESTION 58
What is the role of the setMapOutputCompressorClass class in the development of MapReduce applications?
- A. Set the compression method of reduce output
- B. Set the compression method of Smap input
- C. Set the delivery method of map output
- D. Set the compression method of map output
Answer: D
NEW QUESTION 59
In FusionInsight HD, when using Streaming's ACK mechanism, which of the following statements are correct? (multiple choice)
- A. After Acker is enabled, Streaming will identify the Tuple that failed to be sent and automatically resend it without human intervention.
- B. Starting from the spout, the failure of any link in the formed Tuple tree will mark the entire tree as a failure.
- C. Acker will mark the processing timeout or processing failure message as fail.
- D. The application needs to implement message retransmission logic in the fail() interface method of spout.
Answer: B,C,D
NEW QUESTION 60
A customer has the following scenario: indexing PB-level data requires real-time indexing performance of more than 2MB/s, and supports full-text retrieval, and requires query performance to reach a second-level response.
For the above scenarios, regarding the Solr collection design, which of the following design schemes are reasonable? (multiple choices)
- A. It can be used in conjunction with HBase. Solr only builds indexes for non-RowKey fields that need to be retrieved. HBase is responsible for storing data in all fields.
- B. When creating a Collection, you can set the number of Shards to be an integer multiple of the number of SoIrServer instances to ensure that each SoIrServer instance is negatively balanced as much as possible
- C. In the configuration set, the DirectoryFactory parameter in the solrconfig.xml file can be set to org.apache.solr.core.NIOFSDirectoryFactory
- D. It can be used in conjunction with Hbase, set the uniqueKey field and HBase RowKey field to the same value, and use the implicit Router method to make the document evenly distributed to each shard
Answer: A,B,C
NEW QUESTION 61
In Kafka, the Producer can ensure that the data is sent in order by configuring the synchronization parameters (producer.type).
- A. False
- B. True
Answer: B
NEW QUESTION 62
In the FusionInsight HD system, what interface types does Hive support? (multiple choice)
- A. Python interface
- B. Ruby interface
- C. ODBC interface
- D. JDBC interface
Answer: A,C,D
NEW QUESTION 63
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