Big Data & Hadoop

________________refers to the biases, noise and abnormality in data, trustworthiness of data.

• Value

• Veracity

• Velocity

• Volume

_______________refers to the connectedness of big data.

• Value

• Veracity

• Velocity

• Valence

Consider the following statements:

Statement 1: Volatility refers to the data velocity relative to timescale of event being studied

Statement 2: Viscosity refers to the rate of data loss and stable lifetime of data

• Only statement 1 is true

• Only statement 2 is true

• Both statements are true

• Both statements are false

What are the main components of Hadoop Ecosystem?

• MapReduce, HDFS, YARN

• MLlib, GraphX

• Gelly, Table, CEP

• None of the mentioned

True or False ?

NoSQL databases store unstructured data with no particular schema.

• True

• False

Which of the following is not a NoSQL database?

• HBase

• SQL Server

• Cassandra

• None of the mentioned

________________is a resource management platform responsible for managing compute resources in the cluster and using them in order to schedule users and applications.

• Hadoop Common

• Hadoop Distributed File System (HDFS)

• Hadoop YARN

• Hadoop MapReduce

Which of the following tool is designed for efficiently transferring bulk data between Apache Hadoop and structured datastores such as relational databases.

• Apache Sqoop

• Pig

• Mahout

• Flume

Consider the following statements:

Statement 1: The Job Tracker is hosted inside the master and it receives the job execution request from the client.

Statement 2: Task tracker is the MapReduce component on the slave machine as there are multiple slave machines.

• Only statement 1 is true

• Only statement 2 is true

• Both statements are true

• Both statements are false

_____________is the slave/worker node and holds the user data in the form of Data Blocks.

• NameNode

• DataNode

• Data block

• Replication