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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshooting & Optimization | 10% | - Job failure resolution - Common error diagnosis - Performance tuning |
| Topic 2: Hadoop Cluster Installation & Configuration | 30% | - CDH4 deployment - Network and OS tuning - MapReduce v1 configuration - HDFS architecture and configuration |
| Topic 3: Cluster Management & Monitoring | 25% | - Managing nodes and daemons - Monitoring health and logs - Starting/stopping services - Capacity and performance planning |
| Topic 4: HDFS Operations & High Availability | 20% | - File system maintenance - HDFS High Availability (HA) - Replication and block management - NameNode and DataNode management |
| Topic 5: Security & Data Governance | 15% | - Data protection and backup - Kerberos authentication - Authorization and permissions |
Question 1
Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?
A. ApplicationMasterService
B. ResourceManager
C. ApplicationMaster
D. JobTracker
E. TaskTracker
F. NodeManager
Question 2
Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce v1 (MRv1)
A. NameNode
B. JobTracker
C. TaskTracker
D. Secondary NameNode
E. NodeManager
F. DataNode
Question 3
Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space allocated HDFS storage. Assuming Hadoop's default configuration, how much data will you be able to store?
A. Approximately 100TB
B. Approximately 25TB
C. Approximately 10TB
D. Approximately 33 TB
Question 4
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. DataNode service instance has crashed.
B. The slave nodes, haven't sent a heartbeat in 60 minutes
C. The slave nodes are swapping.
D. A slave node's disk ran out of space
Question 5
What determines the number of Reduces that run a given MapReduce job on a cluster running MapReduce v1 (MRv1)?
A. It is set by the developer.
B. It is set and fixed by the cluster administrator in mapred-site.xml. The number set always run for any submitted job.
C. It is set by the JobTracker based on the amount of intermediate data.
D. It is set by the Hadoop framework and is based on the number of InputSplits of the job.
Solutions:
| Question 1 Answer: C | Question 2 Answer: C,F | Question 3 Answer: D | Question 4 Answer: B | Question 5 Answer: A |
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