Cloudera Certified Administrator for Apache Hadoop CDH4 - CCA-410 Exam Practice Test

A. The mapper transfer the intermediate data immediately to the reducers as it is generated by map task. B. The mapper transfers the intermediate data to the jobtracker, which then sends it to the reducers C. The mapper stores the intermediate data on the underlying filesystem of the local disk of the machine which ran the map task D. The hadoop framework holds the intermediate data in the task trackers memory until it is transferred to the reducers

A. Client application B returns an error B. Application B can read 256MB of the file C. Client application on B can read the 300MB that has been written so far. D. Client application B must wait until the entire file has been written, and will then read its entire contents.

A. ResourceManager B. NodeManager C. ApplicationMaster D. JournalNode E. JobTracker

A. 100 slave nodes B. 100 slave nodes C. 10 slave nodes D. 50 slave nodes

A. For 1GB child heap size an io.sort.mb of 128MB will always maximum memory to disk I/O. B. Increase the IO.sort.mb as high you can, as close to 1GB as possible. C. Decrease the io.sort.mb value below 100M 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.

A. Each pools share of task slots may change throughout the course of job execution B. Each pools share of the tasks slots remains static within the execution of any individual job C. Pools get a dynamically-allocated share of the available task slots (subject to additional constraints) D. Each pool gets 1/M of the total available tasks slots, where M is the no. of nodes in the cluster E. Pools are assigned priorites.pools with higher priorities an executed b4 pools with lower priorities F. Each pool gets 1/N of the total available tasks slots, where N is the no of jobs running on the cluster

A. Namenode B. ApplicationMaster C. Zookeeper D. Datanode E. Hmaster F. Resourcemanager G. Tasktracker

A. the owner and group can modify the contents of the file other can't B. the owner and group cannot delete the file, but other can C. HDFS runs in user space which makes all users with access to the namespace able to read, write and modify all files D. No one can modify the content of the file E. the owner and group can read the file other can't

A. Isolating the standby NameNode from write access to the fsimage and edits files. B. Isolating a failed NameNode from write access to the fsimage and edits files so that is cannot resume write operations if it recovers. C. Isolating both HA NameNodes to prevent a client application from killing the NameNode daemons. D. Isolating the cluster's master daemon to limit write access only to authorized clients.

A. You cannot configure a client to access both directories in the current implementation of HDFS Federation. B. Configure the client to mount both namespaces by specifying the appropriate properties in the core-site.xml C. 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. D. You don't need to configure any parameters on the client machine. Access is controlled by the NameNodes managing the namespace.