Cloudera CCA-505 Exam Questions & Answers

You are planning a Hadoop cluster and considering implementing 10 Gigabit Ethernet as the network fabric. Which workloads benefit the most from a faster network fabric?

A. When your workload generates a large amount of output data, significantly larger than amount of intermediate data

B. When your workload generates a large amount of intermediate data, on the order of the input data itself

C. When workload consumers a large amount of input data, relative to the entire capacity of HDFS

D. When your workload consists of processor-intensive tasks

You observe that the number of spilled records from Map tasks far exceeds the number of map output records. Your child heap size is 1GB and your io.sort.mb value is set to 100 MB. How would you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?

A. Decrease the io.sort.mb value to 0

B. Increase the io.sort.mb to 1GB

C. For 1GB child heap size an io.sort.mb of 128 MB will always maximize memory to disk I/O

D. Tune the 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

Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce V2 (MRv2) on YARN?

A. NodeManager

B. ApplicationMaster

C. ResourceManager

D. TaskTracker

E. JobTracker

F. DataNode

G. NameNode