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NEW QUESTION 83
Spark Streaming, as a stream processing engine for micro-batch processing, converts the data of each time slice into a partition in an RDD for calculation.
- A. True
- B. False
Answer: A
NEW QUESTION 84
Regarding the characteristics of the data collected by Flume, which of the following descriptions is correct?
- A. Only structured data can be collected
- B. Parallel collection with MapReduce tasks
- C. Use external timing tasks to trigger data collection
- D. Support distributed and streaming collection
Answer: D
NEW QUESTION 85
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 86
Which of the following reasons will cause HDFS NameNode to enter safemode (safe read-only mode)? (multiple choice)
- A. The missing copy exceeds the threshold.
- B. The disk space where the metadata of the active and standby NameNodes reside is insufficient.
- C. The damaged copy exceeds the threshold.
- D. The number of lost blocks exceeds the threshold.
Answer: B,D
NEW QUESTION 87
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. 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
- C. 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
- D. In the configuration set, the DirectoryFactory parameter in the solrconfig.xml file can be set to org.apache.solr.core.NIOFSDirectoryFactory
Answer: A,C,D
NEW QUESTION 88
In the Fusioninsight HD product, what is wrong about the Kafka secure and non-secure port description?
(Note: The old API refers to the old Producer API and the old Consumer API. Among them, the old Consumer API: refers to the interface defined in kafka.consumer.ConsumerConnector; the old Producer API: refers to the interface defined in kafka.producer.Producer.)
- A. Kafka cluster security access port defaults to 21007, non-secure access port defaults to 21005.
- B. The premise for the old API to access a topic through port 21005 is that the server parameter allow.everyone.if.no.acl.found is set to true, and the topic does not have ACL attributes set
- C. The old API only supports access to port 21005; the new API is compatible with access to non-secure port 21005 and secure port 21007.
- D. For topics with ACL set, you can use the old API to connect to port 21005 for access.
Answer: D
NEW QUESTION 89
In FusionInsight HD, which parts of a complete Streaming CQL application include at least? (multiple choice)
- A. Business operation statements (such as SELECT, INSERT, JION, etc.)
- B. Create an input stream
- C. Create an output stream
- D. Application submission statement
Answer: A,B,C,D
NEW QUESTION 90
In Spark application development, which of the following codes can correctly count words?
- A. val counts = textFile.map (line=>line.split (" ")).map (word => (word, 1)).groupByKey ()
- B. val counts = textFile.flatMap (line=>line.split (" ")).map (word => (word, 1)).reduceByKey(_ +_)
- C. val counts = textFile.map (line => line.split ("')).map (-rd => (word, 1)).reduceByKey(_ +_)
- D. val counts = textFile.flatMap (line=>line.split (" ")).map (word => (word, 1)).groupByKey ()
Answer: B
NEW QUESTION 91
When a MapReduce application is executed, which of the following actions occurred before the map phase?
- A. split
- B. combine
- C. sort
- D. partition
Answer: A
NEW QUESTION 92
In the FusionInsight HD HBase cluster, Table1 belongs to Namespace1, Table2 belongs to Namespace2, and Table1 has two column families, namely cf11 and cf12, and Table2 has a column family named cf21. Which of the following schemes allows user account A to be at the same time Have read and write permissions for cf11 and cf21. (Multiple choice)
- A. Grant the user account Namespace1 read and write permissions
- B. Give the user account global read permission
- C. Grant the user account Namespace1 and Namespace2 read and write permissions
- D. Grant the user account Table1 and Tablet2 read and write permissions
Answer: C,D
NEW QUESTION 93
In FusionInsight HD, what are the data distribution methods belonging to Streaming? (multiple choice)
- A. Direct Grouping
- B. Local Grouping
- C. Field Grouping
- D. Shuffle Grouping
Answer: A,B,C,D
NEW QUESTION 94
Which of the following is correct about the HDFS client's file reading process? (multiple choice)
- A. The file data is first returned from the DataNode to the NameNode, and then sent from the NameNode to the client.
- B. If the client and the connected DataNode fail during reading, the client will abandon the failed node and connect to the node where the other replica is located.
- C. Support multiple clients to read the same file data from the DataNode at the same time.
- D. Download data from the nearest DataNode first.
Answer: B,C,D
NEW QUESTION 95
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
Answer: A
NEW QUESTION 96
In HDFS application development, which of the following are the interfaces supported by the HDFS service? (multiple choice)
- A. FileSystem.append
- B. FileSystem.create
- C. BufferedOutputStream.flush
- D. BufferedOutputStream.write
Answer: A,B,C,D
NEW QUESTION 97
Which of the following table types does Hive support? (multiple choice)
- A. Bucket table
- B. Tilt table
- C. Partition table
- D. Partition + bucket table
Answer: A,B,C,D
NEW QUESTION 98
Which of the following options is the core function of Yarn?
- A. Resource management
- B. Data transfer
- C. Search
- D. Storage
Answer: A
NEW QUESTION 99
Because Spark is a memory-based computing engine, the amount of data that a Spars application can process cannot exceed the total memory allocated to the Spark application.
- A. True
- B. False
Answer: B
NEW QUESTION 100
In the FusionInsight HD system, in the Solr example project solr-example\conf\solr-example.properties, the values of ZK_URL and ZOOKEEPER_DEFAULT_SERVER_PRINCIPAL can be obtained from which of the following options?
- A. Obtain from the Solr Admin UI interface
- B. Obtained from the FusionInsight Manager Solr service configuration interface
- C. In solr-example\conf\solr-example.properties, these two parameters are already included by default
Answer: A
NEW QUESTION 101
Regarding FusionInsight HD's Spark, which of the following programming languages can be used to develop Spark applications? (multiple choice)
- A. Scala
- B. C
- C. Java
- D. Python
Answer: A,C,D
NEW QUESTION 102
In the MapReduce development framework, what is the function of the InputFormat class?
- A. 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
- B. Combine the results of all map stages to get the final result
- C. Combine key-value pairs with the same key value in the result of the map phase
- D. Sort and merge the results of the map stage
Answer: A
NEW QUESTION 103
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