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Sample Questions:
QUESTION 1:
A slave node in your cluster has 4 TB hard drives installed (4 x 2TB). The DataNode is configured to store HDFS blocks on all disks. You set the value of the dfs.datanode.du.reserved parameter to 100 GB. How does this alter HDFS block storage?
A. 25GB on each hard drive may not be used to store HDFS blocks B. 100GB on each hard drive may not be used to store HDFS blocks C. All hard drives may be used to store HDFS blocks as long as at least 100 GB in total is available on the node D. A maximum if 100 GB on each hard drive may be used to store HDFS blocks
Answer: D
QUESTION 2:
A user comes to you, complaining that when she attempts to submit a Hadoop job, it fails. There is a Directory in HDFS named /data/input. The Jar is named j.jar, and the driver class is named DriverClass. She runs the command: Hadoop jar j.jar DriverClass /data/input/data/output The error message returned includes the line: PriviligedActionException as:training (auth:SIMPLE) cause:org.apache.hadoop.mapreduce.lib.input.invalidInputException: Input path does not exist: file:/data/input What is the cause of the error?
A. The user is not authorized to run the job on the cluster B. The output directory already exists C. The name of the driver has been spelled incorrectly on the command line D. The directory name is misspelled in HDFS E. The Hadoop configuration files on the client do not point to the cluster
Answer: A
QUESTION 3:
You are planning a Hadoop cluster and considering implementing 10 Gigabit Ethernet as the network fabric. Which workloads benefit the most from faster network fabric?
A. When your workload generates a large amount of output data, significantly larger than the amount of intermediate data B. When your workload consumes a large amount of input data, relative to the entire capacity if HDFS C. When your workload consists of processor-intensive tasks D. When your workload generates a large amount of intermediate data, on the order of the input data itself
Answer: A
QUESTION 4:
Which three basic configuration parameters must you set to migrate your cluster from MapReduce 1 (MRv1) to MapReduce V2 (MRv2)?
A. Configure the NodeManager to enable MapReduce services on YARN by setting the following property in yarn-site.xml: <name>yarn.nodemanager.hostname</name> <value>your_nodeManager_shuffle</value> B. Configure the NodeManager hostname and enable node services on YARN by setting the following property in yarn-site.xml: <name>yarn.nodemanager.hostname</name> <value>your_nodeManager_hostname</value> C. Configure a default scheduler to run on YARN by setting the following property in mapredsite. xml: <name>mapreduce.jobtracker.taskScheduler</name> <Value>org.apache.hadoop.mapred.JobQueueTaskScheduler</value> D. Configure the number of map tasks per jon YARN by setting the following property in mapred: <name>mapreduce.job.maps</name> <value>2</value> E. Configure the ResourceManager hostname and enable node services on YARN by setting the following property in yarn-site.xml: <name>yarn.resourcemanager.hostname</name> <value>your_resourceManager_hostname</value> Cloudera CCA-500 Exam F. Configure MapReduce as a Framework running on YARN by setting the following property in mapred-site.xml: <name>mapreduce.framework.name</name> <value>yarn</value>
Answer: A,B,D
QUESTION 5:
You suspect that your NameNode is incorrectly configured, and is swapping memory to disk. Which Linux commands help you to identify whether swapping is occurring?
A. free B. df C. memcat D. top E. jps F. vmstat G. swapinfo
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