BIG DATA FINAL QUIZ

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

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

The number of maps in MapReduce is usually driven by the total size of________________

• Inputs

• Outputs

• Tasks

• None of the mentioned

_______________function processes a key/value pair to generate a set of intermediate key/value pairs.

• Map

• Reduce

• Both Map and Reduce

• None of the mentioned

Consider the pseudo-code for MapReduce's WordCount example (not shown here). Let's now assume that you want to determine the frequency of phrases consisting of 3 words each instead of determining the frequency of single words. Which part of the pseudo-code do you need to adapt?

• Only map()

• Only reduce()

• Both map() and reduce()

• The code does not have to be changed

What is Hive?

• A NoSQL database

• A SQL-like interface for Hadoop

• A graph database

• A data visualization tool

Which of the following best describes Pig?

• A high-level scripting language for Hadoop

• A graph database

• A machine learning framework

• A data compression algorithm

What is the default scripting language for Pig?

• SQL

• Python

• Pig Latin

• Java