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Cloudera CCA-470 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| HDFS Administration | - NameNode and DataNode management - HDFS architecture and data replication |
| MapReduce and Job Management | - Job execution and scheduling - Troubleshooting failed jobs |
| Cluster Maintenance and Monitoring | - Monitoring cluster health and performance - Log analysis and debugging |
| Cluster Installation and Configuration | - Cluster setup and node management - Installing and configuring CDH4 components |
| Hadoop and CDH Architecture | - Hadoop ecosystem components (HDFS, MapReduce) - CDH4 architecture overview and services |
| Upgrade and Migration (CDH4 focus) | - Upgrading CDH components - Compatibility and migration considerations |
Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
1. Which daemon spawns child JVMs to perform MapReduce processing?
A) DataNode
B) TaskTracker
C) NameNode
D) JobTracker
E) Secondary NameNode
2. Choose which best describe a Hadoop cluster's block size storage parameters once you set the HDFS default block size to 64MB?
A) The block size of files in the Cluster will all be multiples of 64M
B) The block size of files in the cluster will all be the exactly 64MB.
C) The block size of files in the cluster can be determined as the block is written.
D) The block size of files in the duster will all at least be 64MB.
3. What is the Secondary NameNode?
A) A standby NameNode, for high availability.
B) An alternate data channel for clients to reach HDFS, should the NameNode become too busy.
C) A data channel between the primary name node and the tertiary NameNode.
D) A process purely intended to perform backups of the NameNode.
E) A process that performs a checkpoint operation on the files produced by the NameNode.
4. Your cluster has nodes in seven racks, and you have provided a rack topology script. What is Hadoop's block placement policy, assuming a block replication factor of three?
A) One copy of the block is written to a node in each of three racks
B) One copy of the block is written to a node in one rack; two copies are written to two nodes in a different rack
C) All three of the block are written to nodes on the same rack
D) Because there are seven racks the block is written to a node on each rack
5. You has a cluster running with the Fail Scheduler enabled. There are currently no jobs running on the cluster 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 al the same time. How will the Fair' Scheduler handle these two Jobs?
A) When job B gets submitted, Job A has to finish first, before job it can get scheduled.
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 consumes all the task slot
D) When job A gets submitted, it doesn't consume all the task slot
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: B | Question # 3 Answer: E | Question # 4 Answer: B | Question # 5 Answer: B |
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