Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) - CCA-470 Exam Practice Test

A. HDFS is rack aware but MapReduce daemons are not. B. Hadoop gives preference to intra-rack data transfer In order to conserve bandwidth. C. Rack location is considered in the HDFS block placement policy. D. Even for small clusters on a single rack, configuring rack awareness will improve performance. E. Configuration of rack awareness is accomplished using a configuration file. You cannot use a rack topology script.

A. DataNode failure B. JobTracker failure C. TaskTracker failure D. Secondary NameNode failure E. NameNode failure

A. The NameNode requires more memory but less disk capacity. B. The NameNode requires less memory and less disk capacity than the DataNodes. C. The NameNode requires more memory and no disk drives. D. The NameNode requires more memory and requires greater disk capacity than the DataNodes. E. The NameNode and DataNodes should the same hardware configuration.

A. JBOD B. RAID 10 C. RAID 1+0 D. RAID 5

A. Stores on the underlying filesystem of the local disk of the machine on which the Reducer. B. On the underlying filesystem of the local disk of the machine on which the Mapper ran. C. In HDFS, in the job's output directory. D. On the underlying filesystem of the local disk machine on which the JobTracker ran. E. In HDFS, in temporary directory defined mapred.tmp.dir.

A. Approximately 100TB B. Approximately 25TB C. Approximately 10TB D. Approximately 33 TB

A. Application Manager B. Resource Manager C. DataNode D. Node Manager E. NameNode F. Secondary NameNode

A. The job will immediately fail. B. After a period of time, the JobTracker will restart the TaskTracker on the node on which the map task is running C. The Mapper will run indefinitely; the TaskTracker must be restarted to kill it D. After a period of time, the TaskTracker will kill the Map Task.

A. Root access to the cluster for users hdfs and mapred but non-root acess clients B. User authentication on all remote procedure calls (RPcs) C. Encryption on all remote procedure calls (RPCs) D. Encryption for data on disk ("at rest") E. Authentication for user access to the cluster against a central server