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Only need to practice for 20 to 30 hours
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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
1. You install Cloudera Manager on a cluster where each host has 1 GB of RAM. All of the services show their status as concerning. However, all jobs submitted complete without an error.
Why is Cloudera Manager showing the concerning status KM the services?
A) A slave node's disk ran out of space
B) DataNode service instance has crashed.
C) The slave nodes are swapping.
D) The slave nodes, haven't sent a heartbeat in 60 minutes
2. Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?
A) JobTracker
B) NodeManager
C) ResourceManager
D) ApplicationMaster
E) ApplicationMasterService
F) TaskTracker
3. It is recommended that you run the HDFS balancer periodically. Why? (Choose 3)
A) To ensure that there is consistent disk utilization across the DataNodes.
B) To ensure that there is capacity in HDTS for additional data.
C) To improve data locality for MapReduce tasks.
D) To ensure that all blocks in the cluster are 128MB in size.
E) To help HDFS deliver consistent performance under heavy loads.
4. In HDFS, you view a file with rw-r--r-- set as its permissions. What does this tell you about the file?
A) The file cannot be run as a MapReduce job
B) As a Filesystem in Userspace (FUSE), HDFS files are available to all user's on a cluster regardless of their underlying POSIX permissions.
C) The file's contents can be modified by the owner, but no-one else
D) The file cannot be deleted by anyone but the owner
E) The file cannot be deleted by anyone
5. You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to configure to run on your master nodes?
A) JobTracker
B) NodeManager
C) ResourceManager
D) ApplicationMaster
E) JournalNode
Solutions:
Question # 1 Answer: D | Question # 2 Answer: D | Question # 3 Answer: A,B,E | Question # 4 Answer: D | Question # 5 Answer: C,D |