In Fusioninsight HD, if you need to view the user and permission group currently logged in to HBase, what command can be executed in the HBase shell?

Answer(s): B

In Hadoop, if yarn.scheduler.capacity.root.QueueA. minimum-user-limit-percenti is set to 50, which of the following statements is wrong?

A user-submitted task can use 100% of QueueA's resources
Each user in QueueA can only get up to 50% of the resources
If there are already 2 user tasks running in QueueA, then the task submitted by the third user needs to wait for the release of resources
QueueA must ensure that each user gets at least 50% of the resources

Answer(s): B

As shown in the figure, the following description of the message read by the Kafka message consumer Consumeri is wrong?

The blue in the picture is a topic of Kafkal, which can be understood as a queue, and each grid represents a message.
The messages generated by the producer are placed at the end of the topic one by one.
Consumers read messages sequentially from right to left.
Consumert uses offset to record the position of the read

Answer(s): C