Which of the following application scenarios can HBase be used for? (multiple choice)

• A.recommended friends
• B.message order storage
• C.User portrait
• D.Time series data storage

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Assume that the minimum resource guarantee for each user is set to YARN. scheduler. capacity. root. Queue A.
minimum-User-limit-percent=25, then the above statement is wrong

• A.When the 4th user submits a task, each user gets up to 25% of the resources
• B.When the 3rd user submits the task, each user gets up to 33.33% of the resources
• C.When the 2nd user submits a task, each user gets up to 50% of the resources
• D.When the 5th user submits a task, each user gets up to 20% of the resources

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Which of the following scenarios are not good at Flink components?

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During data stream processing,frequently used systemtimebetween(proceessing time)dofor an eventbetween. About Processing TimeWhich item is described incorrectly?

• A.In the actual application process, Processing Timeto be behindwith event time
• B.Processing TimeIt is suitable for scenarios with complex processing problems and high requirements for adjustable results.
• C.Processing Time results are not reproducible, once stream computingVersionupgradeEven the system crashes, computing?will stop
• D.Processing Timeexists betweenThe main reason for the difference is due to grid extensionLate, long processing time?Waitmakecompleted

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Which of the following statements about worker, Executor and task are correct? (Multiple choice)

• A.Each worker can only run Executor for one topology
• B.Each worker can run multiple Executors
• C.Each Executor can run tasks of different components (spout or bolt)
• D.Each Executor can run a task

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