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NEW QUESTION 58
For files stored in N (N>1) copies, the HDFS client initiates a file read request. If the read copy node fails, it will directly return to failure and will not go to other copy nodes for reading.
- A. False
- B. True
Answer: A
NEW QUESTION 59
Which of the following scenarios is not suitable for Redis? (multiple choice)
- A. Get the latest N data: for example, get the latest 10 comments on a Weibo
- B. A message queue application that is consumed by multiple consumers at the same time and guarantees that the message is successfully consumed by all subscribers (subscription-notification)
- C. Complex transaction operations
- D. Counter application: for example, counting the number of people logged in to a certain website
Answer: B,C
NEW QUESTION 60
In FusionInsight HD, which of the following are the configuration items of Oozie's MapReduce Action? (multiple choice)
- A. mapred.mapper.class
- B. source
- C. job-tracker
- D. name-node
Answer: A,C,D
NEW QUESTION 61
In Flume, what is the main function of the source function module?
- A. Split the data and send the data to different destinations according to the characteristics of the data
- B. Cache data and save the data in memory or files according to different reliability strategies
- C. Obtain data and convert the original data into data objects that you process
- D. Output data to destination, support multiple output protocols
Answer: C
NEW QUESTION 62
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 disk space where the metadata of the active and standby NameNodes reside is insufficient.
- C. The missing copy exceeds the threshold.
- D. The damaged copy exceeds the threshold.
Answer: A,B
NEW QUESTION 63
In Spark, because DataFrame is a higher-level interface than RDD, the call level will be more. Therefore, the performance of all programs developed based on DataFrame will be worse than that of programs developed based on RDD.
- A. False
- B. True
Answer: A
NEW QUESTION 64
Which of the following measures can improve the query performance of HBase? (multiple choice)
- A. Pre-divide regions to make regions evenly distributed and improve concurrency
- B. The data read at the same time are stored in the same cell
- C. Use secondary indexes to adapt to more query scenarios
- D. Query frequent attributes are placed in front of rowkey
Answer: A,B,C,D
NEW QUESTION 65
For HBase column family, which of the following attributes can be set? (multiple choice)
- A. Compression
- B. Coprocessor
- C. TTL
- D. Versions
Answer: A,C,D
NEW QUESTION 66
When indexing in Solr, which of the following code snippets can significantly improve indexing performance? (multiple choice)
- A. if (updateRequest.getDocumentsMap().size() >= 10000) { cloudSolrClient.request (updateRequest, collName); updateRequest.clear(); }
- B. SolrlnputDocument doc = new SolrlnputDocument(); doc.addField ("id", i.toString()); doc.addField ("name", "Zhang San" + i); doc.addField ("features", "test" + ); doc.addField ("price", (float) i * 1.01); cloudSolrClient.add (doc); cloudSolrClient.commit();
- C. lbClient.setRequestWriter (new BinaryRequestWriter());
- D. if (updateRequest.getDocuments().size() >= 1000) { cloudSolrClient.request (updateRequest, collName); updateRequest.clear(); }
Answer: A,C
NEW QUESTION 67
In FusionInsight HD, Spark uses YARN as the cluster resource management system by default.
- A. True
- B. False
Answer: A
NEW QUESTION 68
When writing MapReduce applications, which two interfaces usually need developers to implement?
- A. map and combine
- B. combine and sort
- C. reduce and combine
- D. map and reduce
Answer: D
NEW QUESTION 69
In FusionInsight HD, regarding Hive's data loading function (importing data through Hive's LOAD command), what is wrong in the following description?
- A. It can be directly loaded to the hive table from the local hard disk of the node where HiveServer is located
- B. It can be directly loaded to the hive table from the local hard disk of the node where the client is located
- C. It can be loaded directly to the hive table from HDFS
- D. Hive's data loading process will not parse the specific file content, mainly the process of file transfer
Answer: B
NEW QUESTION 70
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 71
In FusionInsigt HD, the user wants to query the contents of a certain HBase table through the HBase shell operation. In this scenario, it is recommended that the administrator assign a machine-to-machine account to the user.
- A. False
- B. True
Answer: A
NEW QUESTION 72
In a FusionInsight HD cluster, Flume does not support writing collected data to which service in the cluster?
- A. Kafka
- B. HDFS
- C. HBase
- D. Redis
Answer: D
NEW QUESTION 73
In FusionInsight HD, which of the following parameters of the Hive client are used to control reduce concurrency? (multiple choice)
- A. hive.exec-ducers.max
- B. hive.exec.max.dynamic.partitions.pernode
- C. hive.exec.max.dynamic.partitions
- D. hive.exec.reducers.bytes.per.reducer
Answer: A,D
NEW QUESTION 74
Spark Streaming can receive data from Kafka and perform calculations. The calculation results can only be stored in HDFS and cannot be written back to Kafka.
- A. False
- B. True
Answer: A
NEW QUESTION 75
In Streaming application development, which interface does Bolt use to send Tuples?
- A. nextTuple
- B. open
- C. execute
- D. emit
Answer: C
NEW QUESTION 76
Regarding FusionInsight HD's Spark, which of the following programming languages can be used to develop Spark applications? (multiple choice)
- A. Scala
- B. Python
- C. Java
- D. C
Answer: A,B,C
NEW QUESTION 77
In the process of Flume cascade transmission, you can use the fail over mode to transmit, so that if the Flume node of the next hop fails or the data is received abnormally, it can automatically switch to another way to continue transmission.
- A. True
- B. False
Answer: A
NEW QUESTION 78
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 79
In Kafka, which of the following commands can check how many partitions a topic has?
- A. kafka-topics.sh --create
- B. kafka-topics.sh --list
- C. kafka-topics.sh --alter
- D. kafka-topics.sh - describe
Answer: D
NEW QUESTION 80
What are the features of Streaming in FusionInsight HD? (multiple choice)
- A. High performance
- B. High fault tolerance
- C. Stream processing
- D. Scalable
Answer: A,B,C,D
NEW QUESTION 81
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