Pig Interview Questions
Can you give us some examples how Hadoop is used in real time environment?
Let us assume that we have an exam consisting of 10 Multiple-choice questions and 20 students appear for that exam. Every student will attempt each question. For ...
Hadoop Cluster Commissioning and Decommissioning Nodes
To add new nodes to the cluster:
1. Add the network addresses of the new nodes to the include file.
hdfs-site.xml
<property>
<name>dfs.hosts</name>
<value>/<hadoop-home>/conf/includes</value>
<final>true</final>
</property>
mapred-site.xml
<property>
<name>mapred.hosts</name>
<value>/<hadoop-home>/conf/includes</value>
<final>true</final>
</property>
Datanodes that are permitted to connect to the namenode are specified in a
file whose name is specified by the dfs.hosts property.
Includes file ...
Hive Interview Questions
What is Hive?
Hive is a data warehouse system for Hadoop that facilitates easy data summarization, ad-hoc queries, and the analysis of large datasets stored in Hadoop compatible file systems.
Hive was originally developed at Facebook. It’s now a Hadoop subproject with ...
BigData TechCon-Learn HOW TO Master Big Data, Mar 31-Apr 2, Boston
Big Data TechCon, March 31-April 2, Boston, is the “how-to” big data event. Use code BIGDATA for $200 discount. www.bigdatatechcon.com
Plan now to attend Big Data TechCon, March 31-April 2 in Boston, to learn HOW-TO accommodate the terabytes and petabytes of data ...
Hadoop Interview Questions – MapReduce
Looking out for Hadoop Interview Questions that are frequently asked by employers?
What is MapReduce?
It is a framework or a programming model that is used for processing large data sets over clusters of computers using distributed programming.
What are 'maps' and 'reduces'?
'Maps' ...
YARN and MapReduce 2.0 elevates big data Hadoop and scheduled processing
Are you ready to take advantage of the multi-application functionality of Hadoop with MapReduce 2.0, or as it is more affectionately known, YARN? According to Arun Murthy, a big-data architect and a co-founder of Hortonworks, YARN substantially improves the functionality ...
3 Tools Companies Can Use to Harness the Power of Big Data
To the individual user, Big Data might simply mean a new 3-terabyte hard drive, which can be acquired for a hundred bucks or so. But real Big Data projects require clusters of servers, vast amounts of storage, and specialized software ...
Big Data In 2014-6 Bold Predictions
How will big data evolve in 2014? The future is anyone's guess, of course, but we thought we'd compile a tasty holiday assortment of prognostications from executives working in the big data trenches. So without further delay, here they are ...
The 3 most common ways data junkies are using Hadoop
Just a few weeks ago, Apache Hadoop 2.0 was declared generally available–a huge milestone for the Hadoop market as it unlocks the vision of interacting with stored data in unprecedented ways. Hadoop remains the typical underpinning technology of “Big Data,” ...
7 Big Data Trends for 2014
As the year 2013 is almost over, it is good to have a look back at the trends that I discussed for 2013 and look forward to the Big Data trends of 2014. It can be said that 2013 was ...