CCA-500問題集、Cloudera実際の試験問題

質問 1

You have a cluster running with the fair Scheduler enabled.
There are currently no jobs running on the cluster, and you submit a job A, so that only job A is running on the cluster.
A while later, you submit Job B.now Job A and Job B are running on the cluster at the same time.
How will the Fair Scheduler handle these two jobs?

A. When Job A gets submitted, it consumes all the task slots.

B. When Job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.

C. When Job A gets submitted, it doesn't consumes all the task slots.

D. When Job B gets submitted, Job A has to finish first, before job B can gets scheduled.

正解: D

質問 2

You are running Hadoop cluster with all monitoring facilities properly configured.
Which scenario will go undeselected?

A. The NameNode goes down

B. A DataNode is disconnected from the cluster

C. Map or reduce tasks that are stuck in an infinite loop

D. MapReduce jobs are causing excessive memory swaps

E. HDFS is almost full

正解: A

質問 3

You want to understand more about how users browse your public website. For example, you want to know which
pages they visit prior to placing an order. You have a server farm of 200 web servers hosting your website. Which is
the most efficient process to gather these web server across logs into your Hadoop cluster analysis?

A. Write a MapReeeduce job with the web servers for mappers and the Hadoop cluster nodes for reducers

B. Import all user clicks from your OLTP databases into Hadoop using Sqoop

C. Channel these clickstreams into Hadoop using Hadoop Streaming

D. Sample the web server logs web servers and copy them into HDFS using curl

E. Ingest the server web logs into HDFS using Flume

正解: D,E

質問 4

You are configuring a server running HDFS, MapReduce version 2 (MRv2) on YARN running Linux. How must you
format underlying file system of each DataNode?

A. They must be formatted as HDFS

B. They may be formatted in any Linux file system

C. They must be formatted as either ext3 or ext4

D. They must not be formatted - - HDFS will format the file system automatically

正解: C

質問 5

Your cluster implements HDFS High Availability (HA). Your two NameNodes are named nn01 and nn02. What occurs
when you execute the command: hdfs haadmin -failover nn01 nn02?

A. nn02 is fenced, and nn01 becomes the active NameNode

B. nn01 is fenced, and nn02 becomes the active NameNode

C. nn01 becomes the standby NameNode and nn02 becomes the active NameNode

D. nn02 becomes the standby NameNode and nn01 becomes the active NameNode

正解: B

解説: (PassTest メンバーにのみ表示されます)

質問 6

Which YARN daemon or service negotiations map and reduce Containers from the Scheduler, tracking their status and
monitoring progress?

A. ResourceManager

B. ApplicationManager

C. NodeManager

D. ApplicationMaster

正解: A

解説: (PassTest メンバーにのみ表示されます)

Cloudera Certified Administrator for Apache Hadoop (CCAH) - CCA-500 模擬練習