H13-723 무료 덤프문제 온라인 액세스

In Spark, the accumulator can realize high-speed parallel counter and variable summation; in the process of Spark application development, only the value of this counter can be obtained on the Driver.

• A.True
• B.False

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 number of lost blocks exceeds the threshold.
• D.The damaged copy exceeds the threshold.

In FusionInsight HD, assuming a topology, spout concurrency is set to 3, bolt1 concurrency is 2, bolt2 concurrency is 3, and the number of workers is 2, then how are bolt1's executors distributed among workers?

• A.There is no fixed pattern
• B.One of the two workers is distributed to two
• C.Two workers each distribute one
• D.Two workers are distributed

In Kafka, is the following statement about the data sent by the Producer wrong? (multiple choice)

• A.As a message producer, Producer can directly write data to ZooKeeper
• B.Producer is responsible for producing data, Consumer is responsible for consuming data, Socket connection needs to be established between Producer and Consumer
• C.Producer can send data to Broker, and can send data to Consumer
• D.Producer can produce data by connecting to any normal Broker instance

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