Core java interview preparations-Links

These are my notes on Core java while i was preparing for interviews. As you know core java holds an important percentage of questions in a technical interview. Here i am listing all the important portions of core java and corresponding links. The difficulty level is above average and i am not listing the basic topics. This will be helpful to you if you have basics of java and prepare for a technical interview or something.Lets start !

Before that if you want to have general reading about java concepts then read : Link & Link

• Volatile variable Click here & more details here

Special case of long & double with volatile keyword - here

• Thread vs process - here

• Transient variable Click here

• How HashMap works ?

This is an important topic for technical interviews ,

Click here 1

         Click here 2

• Iterator and Enumeration Click here

• Enum and Enumeration Click here

• Singleton design pattern Click here & Here

• Singleton without static keyword Click here

• Singleton with enum Click here

• Executor framework

This link provides all the concurrent util methods of java.

Database interview Links

• 10 Frequently asked SQL Query

http://java67.blogspot.in/2013/04/10-frequently-asked-sql-query-interview-questions-answers-database.html

• Try online SQL terminal - http://www.w3schools.com/sql/trysql.asp?filename=trysql_select_all
• suppose you have table with no primary keys. so this table can have duplicate rows. How would you delete duplicate rows but keep exactly one of that kind?
• Delete duplicates from a table

Interview experience : Manhattan Associates - Software Engineer

Manhattan Associates is a supplier of supply chain management software.Warehouse management systems make up 60% of the company’s revenue while 40% is derived from supply chain management applications such as transportation management, enterprise order management, supply chain planning, extended enterprise management, and labor management solutions headquartered in Atlanta,Georgia.

   I have received the call from the consultancy and appeared for the interview on a week day. I was getting interview for their RnD division so consultancy has told me to prepare deeply on Core java concept,Spring and database.

Round 1 

It was a written round consist of technical and logical questions, technical questions were 30 MCQ and 2 coding questions. MCQ were kind of similar types of OCJP questions checking the core java concepts deeply and in coding part there was 2 questions, one was a simple question on java programming and other one was to write SQL queries  based on the given tables.