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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Security and Cluster Operations | - Security configuration
|
| Data Processing Tools and Ecosystem | - Data ingestion and processing tools
|
| Cluster Installation and Configuration | - Service configuration
|
| Cluster Monitoring and Troubleshooting | - Fault diagnosis
|
| Hadoop Cluster Architecture (CDH4) | - Core Hadoop components
|
| HDFS Administration | - Storage maintenance
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
Question 1
What does each block of a file contain where it is return into HDFS?
A. Each block has a header and footer containing metadata
B. Each block writes a separate meta file containing information on the file name of which the block is a part
C. Each block as a header containing metadata
D. Each block contains only data from the file
Question 2
Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?
A. TaskTracker
B. DataNode
C. NodeManager
D. NameNode
E. ResourceManager
F. JobTracker
G. ApplicationMaster
Question 3
You observe that the number of spilled records from map tasks for exceeds the number of map output records. You child heap size is 1 GB and your io.sort.mb value is set to 100MB. How would you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?
A. Increase the IO.sort.mb as high you can, as close to 1GB as possible.
B. Decrease the io.sort.mb value below 100M
C. For 1GB child heap size an io.sort.mb of 128MB will always maximum memory to disk I/O.
D. Tune io.sort.mb value until you observe that the number of spilled records equals (or is as close to equals) the number of map output records.
Question 4
You have a cluster running with the fair scheduler enabled and configured. You submit multiple jobs to the cluster. Each job is assigned to a pool. What are the two key points to remember about how jobs are scheduled with the fair scheduler?
A. Each pools share of the tasks slots remains static within the execution of any individual job
B. Pools are assigned priorites.pools with higher priorities an executed b4 pools with lower priorities
C. Each pools share of task slots may change throughout the course of job execution
D. Each pool gets 1/N of the total available tasks slots, where N is the no of jobs running on the cluster
E. Pools get a dynamically-allocated share of the available task slots (subject to additional constraints)
F. Each pool gets 1/M of the total available tasks slots, where M is the no. of nodes in the cluster
Question 5
What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?
A. RAID 5
B. RAID 1+0
C. JBOD
D. RAID 10
Solutions:
| Question 1 Answer: B | Question 2 Answer: A | Question 3 Answer: D | Question 4 Answer: C,E | Question 5 Answer: C |
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