Cloudera CCA-410

Universal answer template

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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Your developers request that you enable them to use pig on your hadoop cluster. What do you need to configure and / or install?

A) Install the pig interpreter on all nodes in the cluster, and the client machines
B) Install the pig jar's on the all slave nodes in the cluster the pig interpreter on the client machines
C) Install the pig interpreter on the master node which is running the jobtracker
D) Install the pig interpreter on the client machines only.

2. Your cluster has nodes in seven racks, and you have provided a rack topology script. What is Hadoop's block placement policy, assuming a block replication factor of three?

A) Because there are seven racks the block is written to a node on each rack
B) One copy of the block is written to a node in each of three racks
C) One copy of the block is written to a node in one rack; two copies are written to two nodes in a different rack
D) All three of the block are written to nodes on the same rack

3. What is the best disk configuration for slave nodes in hadoop cluster where each node has 6x2TB drives?

A) A RAID 5 array
B) Three RAID 1 arrays
C) A single Linux LVM (Logical volume Manager) volume
D) Six separate volumes

4. Using hadoop's default settings, how much data will be able to store on your hadoop cluster if it is has 12 nodes with 4TB raw diskspace per node allocated to HDFS storage?

A) Approximately 48TB
B) Approximately 3TB
C) Approximately 12TB
D) Approximately 16TB

5. Your cluster Mapreduce V1 (MVR1). What determines where blocks are return into HDFS client application?

A) The client immediately to data nodes based on the clusters rack locality settings
B) The client queries the name node, which returns information on which data nodes to use. Then client writes to those data nodes.
C) the client writes immediately to data nodes at random
D) The clients sends the data to the name node, which then writes those blocks to the data nodes

Solutions: