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

A. The FIFO Schedule will pass an exception back to the client when Job B is submitted, since all slots on the cluster are in use.

B. Tasks are scheduled in the order of their jobs' submission.

C. Given Jobs A and B submitted in that order, all tasks from job A are guaranteed to finish before all tasks from job B.

D. Because there is more then a single job on the cluster, the FIFO Scheduler will enforce a limit on the percentage of resources allocated to a particular job at any given time.

E. The order of execution of tasks within a job may vary.

F. The FIFO Scheduler will give, on average, equal share of the cluster resources over the job lifecycle.

A. All three of the block are written to nodes on the same rack

B. One copy of the block is written to a node in one rack; two copies are written to two nodes in a different rack

C. Because there are seven racks the block is written to a node on each rack

D. One copy of the block is written to a node in each of three racks

A. Secondary NameNode

B. NameNode

C. DataNode

D. Application Manager

E. Node Manager

F. Resource Manager

A. Du

B. The map-only checksum utility,

C. Fsck

D. Dskchk

E. Hadoop does not provide any tools to discover missing or corrupt data; there is no need because three replicas are kept for each data block.

A. Half the number of the maximum number of Reduce tasks which can run on the cluster as a whole.

B. The same value on each slave node.

C. The maximum number of Map tasks can run simultaneously on an individual node.

D. The maximum number of Map tasks which can run on the cluster as a whole.

E. Half the number of the maximum number of Reduce tasks which can run simultaneously on an individual node.

A. Creates and configures you kdc with default cluster values.

B. Creates users for hdfs and mapreduce to facilitate role assignment.

C. Creates a set of pre-configured Kerberos keytab files and their permissions.

D. Creates directories for temp, hdfs, and mapreduce with correct permissions.

E. Automatically configure permissions for log files at $MAPPED_LOG_DIR/userlogs

A. A data channel between the primary name node and the tertiary NameNode.

B. A process that performs a checkpoint operation on the files produced by the NameNode.

C. A standby NameNode, for high availability.

D. An alternate data channel for clients to reach HDFS, should the NameNode become too busy.

E. A process purely intended to perform backups of the NameNode.

A. DataNodes make copies of their data blocks, and put them on different local disks.

B. Reliance on RAID at each datanode.

C. Reliance on SAN devices as a DataNode interface.

D. Storing multiple replicas of data blocks on different DataNodes.

A. The choice of operating system isn't very important for a Hadoop cluster.

B. Linux is preferable to Windows and Solaris/OpenSolaris. Some Linux distributions are intended for cluster environments more than others.

C. Linux and Solaris/OpenSolaris are preferable to Windows. Solaris running on SPARC hardware is the preferred Hadoop slave node configuration.

D. Linux is preferable to Windows and Solaris/OpenSolaris, but the choice of Linux distribution is unimportant when planning a Hadoop cluster.