Java Interview Questions


Real Time Hadoop Interview Questions From Different Readers

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 […]


Java Collections Interview Questions and Answers

Below are some of the Java Collections Interview Questions and Answers. Java Collections Interview Questions and Answers 1. What is a collections ? Collection is an object which manages a group of objects called elements which are of same kind, that is they all descents from common parent type. 2. What are the core collection interfaces? Collection,Set, SortedSet, List, Queue,Deque and Map. SortedSet and SortedMap interfaces are sorted versions of Set […]


Java Interview Questions and Answers – Part 5

Java Interview Questions and Answers for experienced 1. What is the difference between error and an exception? Errors are abnormal conditions that should never occur. Not to be confused with the compile time errors. A method is not required to declare in its throws clause any subclasses of Error that might be thrown during the execution of the method but not caught. An exception is a condition that a programmer […]


Java Interview Questions and Answers – Part 4

Java Interview Questions and Answers 1. What is the difference between the Boolean & operator and the && operator? If an expression involving the Boolean & operator is evaluated, both operands are evaluated. Then the & operator is applied to the operand. When an expression involving the && operator is evaluated, the first operand is evaluated. If the first operand returns a value of true then the second operand is […]


Java Interview Questions and Answers – Part 3 1

Java Interview Questions and Answers 1. What is JIT Compiler ? JIT compiler coverts a byte code of one operating system to the current operating system’s executable code. This instruction is given by JVM of the current system. The byte is compiled into native platform code. The execution speed is greatly improved by this process, because the platform is directly executing the native byte code. 2. What is the difference […]


Java Interview Questions and Answers – Part 2

This post is continuation for previous post on Java Interview Questions and Answers. We will try to focus only the concepts that are required for Hadoop Developers and Hadoop Administrators. Java Interview Questions and Answers: 1. What is the difference between a JDK and a JRE ? JDK, Java Development Kit is for development purpose and it includes execution environment also. But JRE is purely java run time environment and hence we will not […]


Java Interview Questions and Answers

In this post, we will try to cover some of the important Java interview questions and answers that are required for aspirants facing hadoop developer interviews. We will touch base only the concepts that are needed for an hadoop developer or administrator. Java Interview Questions and Answers for Experienced: 1. What is a JVM ? JVM is Java Virtual Machine which is a run time environment for the compiled java class […]


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I have attended Siva’s Spark and Scala training. He is good in presentation skills and explaining technical concepts easily to everyone in the group. He is having excellent real time experience and provided enough use cases to understand each concepts. Duration of the course and time management is awesome. Happy that I found a right person on time to learn Spark. Thanks Siva!!!

Dharmeswaran ETL / Hadoop Developer Spark Nov 2016 September 21, 2017

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