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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. 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) a maximum of 100GB on each hard drive may be used to store HDFS blocks
B) All Hard drives may be used to store HDFS blocks as long as at least 100GB in total is available on the node
C) 100 GB on each hard drive may not be used to store HDFS blocks
D) 25 GB on each hard drive may not be used to store HDFS Blocks

2. You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?

A) The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.
B) The client throws an exception.
C) The file writes fails silently; no file is written, no error is reported.
D) The file successfully writes to /users/reports/myreports/myreport.txt.

3. 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, it will get assigned tasks, while job A continues to run with fewer tasks.
B) When job B gets submitted, Job A has to finish first, before job it can get scheduled.
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

4. You've configured your cluster with HDFS Federation. One NameNode manages the /data namesapace and another Name/Node manages the /reports namespace. How do you configure a client machine to access both the /data and the /reports directories on the cluster?

A) Configure the client to mount the /data namespace. As long as a single namespace is mounted and the client participates in the cluster, HDFS grants access to all files in the cluster to that client.
B) You don't need to configure any parameters on the client machine. Access is controlled by the NameNodes managing the namespace.
C) You cannot configure a client to access both directories in the current implementation of HDFS Federation.
D) Configure the client to mount both namespaces by specifying the appropriate properties in the core-site.xml

5. What does CDH packaging do on install to facilitate Kerberos security setup?

A) Creates a set of pre-configured Kerberos keytab files and their permissions.
B) Creates users for hdfs and mapreduce to facilitate role assignment.
C) Automatically configure permissions for log files at $MAPPED_LOG_DIR/userlogs
D) Creates and configures you kdc with default cluster values.
E) Creates directories for temp, hdfs, and mapreduce with correct permissions.

Solutions: