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NEW QUESTION 37
Suppose there is an application that needs to frequently access the user table in the Oracle database. In order to improve performance, Redis is introduced to cache user information.
For this scenario, which of the following is the best data structure choice for Redis?
- A. list
- B. hash
- C. set
- D. sorted set
Answer: B
NEW QUESTION 38
In the implementation of the business logic of HBase writing data, which of the following interfaces or classes does not need to be involved?
- A. HTable
- B. Put
- C. HBaseAdmin
- D. PutList
Answer: C
NEW QUESTION 39
In Kafka, Consumer can support both offline and online message consumption, but the consumption of data is sequential consumption.
- A. False
- B. True
Answer: B
NEW QUESTION 40
The calculation logic of the Spark application will be parsed into DNG. Which of the following functional modules will complete this parsing operation?
- A. Driver
- B. Executor
- C. Application Master
- D. Client
Answer: A
NEW QUESTION 41
The system time of the node where the HDFS client is located must be consistent with the system time of the FusionInsight HD cluster. If there is a time difference, the time difference should be less than a few minutes?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 42
For the HBase component of the FusionInsight HD platform, what attributes of the secondary index need to be defined when adding a secondary index? (multiple choice)
- A. Index name
- B. Index column
- C. The name of the column family to which the index column belongs
- D. Index column type
Answer: A,B,C,D
NEW QUESTION 43
In FusionInsigt HD, an application deployed on Tomcat needs to access the HBase service. In this scenario, it is recommended to use a machine-to-machine account.
- A. False
- B. True
Answer: B
NEW QUESTION 44
There are scenarios where 500G of new data is generated by the online system every day, and these data need to be statistically summarized in dimensions such as days, weeks, and months.
Which table is suitable for Hive processing?
- A. Partition table, partition by day
- B. Tilt table, select the date in the tilt field, and the tilt value is random
- C. Bucket table, according to talent
- D. Partition + bucket table, partitioned by time, 2560 buckets per partition
Answer: A
NEW QUESTION 45
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 46
In Streaming application development, which interface does Bolt use to send Tuples?
- A. open
- B. execute
- C. nextTuple
- D. emit
Answer: B
NEW QUESTION 47
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 48
Which of the following descriptions about the characteristics of Kafka is correct? (multiple choice)
- A. Kafka can achieve message persistence
- B. Kafka is suitable for offline and online message consumption scenarios
- C. Kafka can ensure that the messages in each Partition are in order
- D. Kafka is a high-throughput, distributed, publish-and-subscribe messaging system
Answer: A,B,C,D
NEW QUESTION 49
Redis LIST data structure, which of the following scenarios is suitable for? (multiple choice)
- A. Simulate stack operation
- B. Get the latest N data operations: for example, get the latest 10 comments on a Weibo
- C. uniq operation, for example, get the weight value of all data in a certain period of time
- D. Build a queue system, such as a message queue
Answer: A,B,D
NEW QUESTION 50
HDFS adopts a file access model of "write once, read many times". Therefore, it is recommended that after a file is created, written, and closed, it should not be modified.
- A. False
- B. True
Answer: B
NEW QUESTION 51
During the Solr application development of FusionInsight HD products, you can verify the Collection through the Solr Admin UI.
Which of the following statements about Solr Admin UI is correct? (multiple choice)
- A. Click Tree under Cloud to view metadata information such as Collections, configuration sets and live_nodes in Solr Cloud
- B. Enter the Core Overview interface of the Shard Replica of a Collection, you can view the actual number of documents, storage size and location information of the Replica index
- C. Solr user group, Solr admin role and Super group users can access Solr Admin UI
- D. Click Cloud to view the distribution and status of each ShardReplica under each Collection
Answer: A,B,C,D
NEW QUESTION 52
In the HBase table design, for multiple businesses sharing the rowkey, which leads to data access contradictions, what strategies can be used to deal with it?
- A. Redundancy method (use space for time plant efficiency)
- B. Create a secondary index
- C. Pre-division region
- D. Compromise method (rowkey design takes into account the business needs of A and B)
Answer: A,B,D
NEW QUESTION 53
When writing MapReduce applications, which two interfaces usually need developers to implement?
- A. combine and sort
- B. reduce and combine
- C. map and reduce
- D. map and combine
Answer: C
NEW QUESTION 54
An application needs to interact with two FusionInsight clusters at the same time: it needs to access both the HBase service of cluster 1 and the Hive service of cluster 2;
So which of the following operations are necessary? (multiple choice)
- A. Create the account required for this application on cluster 1, and set this account to access the HBase service of the cluster
- B. Create an account with the same name in option A on cluster 2, and set this account to access the Hive service of this cluster
- C. Cluster 1 and cluster 2 complete mutual trust operation
- D. The accounts created by option A and option B must belong to the supergroup group
Answer: A,B,C
NEW QUESTION 55
Solr is a high-performance, full-text search service based on Lucene. Solr has extended Lucene to provide a richer query language than Lucene, and implements a powerful full-text search function with a high degree of scalability. At the same time, starting from Solr 4.0 version, SolrCloud mode is supported.
- A. False
- B. True
Answer: B
NEW QUESTION 56
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