MC	Which statement is NOT CORRECT?	Hadoop Common is a set of shared programming libraries used by other modules.	incorrect	Hadoop's MapReduce is mainly Java-based.	incorrect	In MapReduce, the reducing can start before the mappers have finished.	incorrect	A MapReduce program can be implemented in an easy, straightforward manner.	correct	
MC	Which statement is CORRECT?	Apache Spark is fault tolerant and efficient. 	correct	Hive does not support full ACID transaction management. 	incorrect	HiveQL supports complex subqueries. 	incorrect	GraphX does not provide any graph analytics. 	incorrect	
MC	Which of the following elements launches application containers and monitors the application resource usage?	ApplicationMaster	incorrect	JobTracker	incorrect	ResourceManager	incorrect	NodeManager	correct	
MC	Consider the following two statements:<br><br>i. The Nutch project had implemented a MapReduce-based programming facility.<br>ii. HDFS is based on NDFS, the distributed file system from Nutch.<br>Which of these statements is correct?	Both statements are correct.	correct	Statement i is correct, but statement ii is not correct.	incorrect	Statement ii is correct, but statement i is not correct.	incorrect	Both statements are not correct.	incorrect	
MC	Pig is...	A database which runs on Hadoop.	incorrect	A programming language that can be used to query HDFS data.	incorrect	A project offering a programming language to provide more user-friendliness compared to MapReduce programs.	correct	A SQL engine which runs on top of Hadoop.	incorrect	
MC	Which of the following elements is the entry point to which client submit their YARN applications?	NodeManager	incorrect	ApplicationMaster	incorrect	Scheduler	incorrect	ResourceManager	correct	
MC	Which statement is CORRECT?	One of the disadvantages of Spark is that it does not support streaming data.	incorrect	One of the disadvantages of Spark is that it has no way to deal with graph based data.	incorrect	One of the disadvantages of Spark is that its streaming API does not allow to join multiple streams.	incorrect	One of the disadvantages of Spark is that its streaming and machine learning APIs are still mostly RDD based.	correct	
MC	What do the 5 V's of Big Data stand for?	Volume, Variety, Velocity, Veracity, Value.	correct	Volume, Variety, Velocity, Variability, Value.	incorrect	Volume, Visualization, Velocity, Variety, Value.	incorrect	Volume, Versatile, Velocity, Visualization, Value.	incorrect	
MC	Which of the following is not one of the reasons why Spark programs are generally faster than MapReduce operations?	Because Mesos can be used as a resource manager instead of YARN.	correct	Because Spark uses a directed acyclic graph instead of MapReduce.	incorrect	Because Spark tries to keep its RDDs in memory as long as possible.	incorrect	Because RDD transformations are "lazily" applied.	incorrect	
MC	How does a client read a file from HDFS?	The client queries all DataNodes in parallel. The DataNode that contains the requested data responds directly to the client, while the client reads the data directly off the DataNode.	incorrect	The client sends a request to the NameNode. The NameNode then queries the DataNodes for the blocklocations. The DataNodes respond to the NameNode and the NameNode will pass on the information to the client. The client then reads the data directly of the DataNode(s).	incorrect	The client sends a request to the NameNode. The NameNode contacts the DataNode(s) that contain the desired information. The DataNode(s) send the data to the NameNode, who forwards it the client.	incorrect	The client sends a request to the NameNode. The NameNode will return the blocklocations of which DataNode(s) contain the desired information. The client then reads the data directly of the DataNode(s).	correct