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 RDD transformations are "lazily" applied.	incorrect	Because Spark tries to keep its RDDs in memory as long as possible.	incorrect	
MC	Pig is...	A project offering a programming language to provide more user-friendliness compared to MapReduce programs.	correct	A database which runs on Hadoop.	incorrect	A programming language that can be used to query HDFS data.	incorrect	A SQL engine which runs on top of Hadoop.	incorrect	
MC	Which of the following schema handling methods does Hive apply?	Schema on write	incorrect	Schema on query	incorrect	Schema on read	correct	Schema on load	incorrect	
MC	Which statement is CORRECT?	HDFS is composed of a NameNode, DataNodes, and an optional SecondaryNameNode.	correct	DataNodes in HDFS store a registry of metadata.	incorrect	The HDFS NameNode sends regular heartbeat messages to its DataNodes.	incorrect	Both the SecondaryNameNode and primary NameNode can simultaneously handle requests from clients.	incorrect	
MC	Which components does the base Hadoop stack include?	HDFS, Map and Reduce.	incorrect	HDFS, MapReduce and YARN.	correct	HDFS, Spark and YARN.	incorrect	NDFS, MapReduce, and YARN.	incorrect	
MC	Which statement is NOT CORRECT?	Hive offers an SQL engine to query Hadoop data.	incorrect	Hive's query language is not as feature complete as the full SQL standard.	incorrect	Hive offers a JDBC interface.	incorrect	Hive queries run much faster than hand-written MapReduce programs.	correct	
MC	Pig is...	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	A programming language that can be used to query HDFS data.	incorrect	A database which runs on Hadoop.	incorrect	
MC	Which statement is NOT CORRECT?	Hive offers a JDBC interface.	incorrect	Hive queries run much faster than hand-written MapReduce programs.	correct	Hive's query language is not as feature complete as the full SQL standard.	incorrect	Hive offers an SQL engine to query Hadoop data.	incorrect	
MC	Which statement is CORRECT?	The HDFS NameNode sends regular heartbeat messages to its DataNodes.	incorrect	HDFS is composed of a NameNode, DataNodes, and an optional SecondaryNameNode.	correct	DataNodes in HDFS store a registry of metadata.	incorrect	Both the SecondaryNameNode and primary NameNode can simultaneously handle requests from clients.	incorrect	
MC	Which statement is NOT CORRECT?	MapReduce programs can be automatically parallelized and executed across a cluster of different computers.	incorrect	DStream is internally represented as a sequence of RDD fragments.	incorrect	HBase offers a SQL engine to query its data.	correct	Pig is slower than a modern RDBMS, especially for reasonably sized, structured data. 	incorrect