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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Security and User Management | - Authentication and authorization
|
| MapReduce and Processing Framework | - MapReduce v1 execution model (CDH4)
|
| Cluster Monitoring and Troubleshooting | - Monitoring tools and logs
|
| HDFS Management | - HDFS architecture and operations
|
| Cluster Architecture and Installation | - Cloudera Manager administration
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
1. What occurs when you run a hadoop job specifying output directory for job output which already exists in HDFS?
A) An error will occur immediately because the output directory must not already exist.
B) the job will run successfully. Output from the reducers will override the contents of existing directory
C) the job will run successfully output from the reducers will be placed in a directory called job output -1
D) an error will occur after the mappers have completed but before any reducers begin to run because the output path must not exist during the shuffle and sort.
2. Your cluster Mode size is set to 128MB. A client application (client application A) is writing a 500MB file to HDFS. After client application A has written 300MB of data, another client (client application B) attempts to read the file. What is the effect of a second client requesting a file during a write?
A) Client application on B can read the 300MB that has been written so far.
B) Application B can read 256MB of the file
C) Client application B returns an error
D) Client application B must wait until the entire file has been written, and will then read its entire contents.
3. You are planning a Hadoop duster, and you expect to be receiving just under 1TB of data per week which will be stored on the cluster, using Hadoop's default replication. You decide that your slave nodes will be configured with 4 x 1TB disks.
Calculate how many slave nodes you need to deploy at a minimum to store one year's worth of data.
A) 10 slave nodes
B) 50 slave nodes
C) 100 slave nodes
D) 100 slave nodes
4. What is the best disk configuration for slave nodes in hadoop cluster where each node has 6x2TB drives?
A) A RAID 5 array
B) Six separate volumes
C) A single Linux LVM (Logical volume Manager) volume
D) Three RAID 1 arrays
5. Each slave node in your cluster has four 2 TB hard drives installed (4x2TB). You set a value of the dfs.du.datanode.received parameter to 100GB on each slave node. How does this alter HDFS block storage?
A) 25 GB on each hard drive may not be used to store HDFS Blocks
B) a maximum of 100GB on each hard drive may be used to store HDFS blocks
C) 100 GB on each hard drive may not be used to store HDFS blocks
D) All Hard drives may be used to store HDFS blocks as long as at least 100GB in total is available on the node
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: B | Question # 3 Answer: B | Question # 4 Answer: B | Question # 5 Answer: C |
