Real Time Hadoop Interview Questions from Various interviews Hive – Where do you use Internal or Managed table? What scenarios? In your resume, what do you mean by, “monitoring & managing MapReduce jobs"? Explain? Interviewer’s Project: How to modify the RDBMs’ Nested SQL queries into Hadoop framework using Pig. Sqoop: Need to know very well. Some of the current projects are importing data from other RDBMs sources into HDFS. Can […]
1. What does commodity Hardware in Hadoop world mean? ( D ) a) Very cheap hardware b) Industry standard hardware c) Discarded hardware d) Low specifications Industry grade hardware 2. Which of the following are NOT big data problem(s)? ( D) a) Parsing 5 MB XML file every 5 minutes b) Processing IPL tweet sentiments c) Processing online bank transactions d) both (a) and (c) 3. What does “Velocity" in […]
In this post, we will discuss about another 50 Mapreduce Interview Questions and Answers for experienced mapreduce developers. Mapreduce Interview Questions and Answers for experienced 1. What are the methods in the Mapper class and order of their invocation?
Below are a few more hadoop mapreduce interview questions and answers for experienced and freshers hadoop developers. Hadoop Mapreduce Interview Questions and Answers for Experienced: 1. After restart of namenode, Mapreduce jobs started failing which worked fine before restart. What could be the wrong ? The cluster could be in a safe mode after the restart of a namenode. The administrator needs to wait for namenode to exit the safe […]
Below are a few more hadoop mapreduce interview questions and answers for experienced and freshers hadoop developers. Hadoop Mapreduce Interview Questions and Answers for Experienced: 1. What is side data distribution in Mapreduce framework ? The extra read-only data needed by a mapreduce job to process the main data set is called as side data. There are two ways to make side data available to all the map or reduce […]
A few of the hadoop Mapreduce Interview questions and answers are presented in this post. These are suitable for both beginners and experienced mapreduce developers. Mapreduce Interview Questions and Answers for Freshers: 1. What is Mapreduce ? Mapreduce is a framework for processing big data (huge data sets using a large number of commodity computers). It processes the data in two phases namely Map and Reduce phase. This programming model is […]
I am a plsql developer. Intrested to move into bigdata.
I really like your explanations.
Sylvain Nzeyanghadoop developer
Rita FeehanData Management
i am new to hadoop
Virat Raj Joshi.net developer
Want to learn hadoop eco system
Siva , your teaching's are great and indeed very useful for the people who are interested in hadoop. Your sessions are more close to real-time and helps every one to get clear in interviews. Thanks for your support.