MC	Pig is...	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	A project offering a programming language to provide more user-friendliness compared to MapReduce programs.	correct	
MC	Which statement is NOT CORRECT?	Hive queries run much faster than hand-written MapReduce programs.	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	
MC	Which of the following commands are not a part of HBase?	Describe	incorrect	Put	incorrect	Place	correct	Get	incorrect	
MC	Which statement is CORRECT?	HiveQL supports complex subqueries. 	incorrect	DataNodes in HDFS store a registry of metadata.	incorrect	HDFS's high emphasis on fault tolerance results in data replication.	correct	Hive applies a 'schema on write' approach.	incorrect	
MC	Which of the following is not one of the reasons why Spark programs are generally faster than MapReduce operations?	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 Mesos can be used as a resource manager instead of YARN.	correct	Because RDD transformations are "lazily" applied.	incorrect	
MC	Which statement is NOT CORRECT?	Spark SQL DataFrames need to be created by loading a file.	correct	Spark SQL exposes DataFrame and Dataset APIs which underlyingly use RDDs together with a performant SQL query engine.	incorrect	Spark SQL can be used from within Java, Python, Scala and R.	incorrect	Spark SQL can be used through ODBC and JDBC interfaces.	incorrect	
MC	Which statement is CORRECT?	HBase works well on large clusters as well as small ones having a few nodes.	incorrect	HBase can be considered as a NoSQL database.	correct	HBase offers a SQL engine to query its data.	incorrect	MapReduce programs cannot be used with HBase. Data is accessed using simple put and get commands instead.	incorrect	
MC	Pig is...	A database which runs on Hadoop.	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	A programming language that can be used to query HDFS data.	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 NOT CORRECT?	Velocity in Big Data refers to data "in movement".	incorrect	Veracity in Big Data refers to data "in change".	correct	Variety in Big Data refers to data "in many forms".	incorrect	Volume in Big Data refers to data "at rest".	incorrect