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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. Which Two of the following statements are true about hdfs? Choose 2 answers

A) HDFS works best when storing a large number of relatively small files
B) Block sizes for all files must be the same size
C) Blocks are replicated to multiple datanodes
D) An HDFS file that is larger than dfs.block.size is split into blocks

2. What is a SequenceFile?

A) A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.
B) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous writable objects.
C) A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be same type.
D) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous writable objects.

3. In Hadoop 2.0, which TWO of the following processes work together to provide automatic failover of the NameNode? Choose 2 answers

A) QuorumManager
B) JournalNode
C) ZooKeeper
D) ZKFailoverController

4. Which describes how a client reads a file from HDFS?

A) The client queries the NameNode for the block location(s). The NameNode returns the block location(s) to the client. The client reads the data directory off the DataNode(s).
B) The client contacts the NameNode for the block location(s). The NameNode then queries the DataNodes for block locations. The DataNodes respond to the NameNode, and the NameNode redirects the client to the DataNode that holds the requested data block(s). The client then reads the data directly off the DataNode.
C) The client contacts the NameNode for the block location(s). The NameNode contacts the DataNode that holds the requested data block. Data is transferred from the DataNode to the NameNode, and then from the NameNode to the client.
D) The client queries all DataNodes in parallel. The DataNode that contains the requested data responds directly to the client. The client reads the data directly off the DataNode.

5. Which process describes the lifecycle of a Mapper?

A) The TaskTracker spawns a new Mapper to process all records in a single input split.
B) The JobTracker spawns a new Mapper to process all records in a single file.
C) The TaskTracker spawns a new Mapper to process each key-value pair.
D) The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.

Solutions: