Coding test: 1. Given a string, find out if there's repeat characters in it. 2. SQL. Given a Customer table and a Payment table (with Customer ID as primary and foreign key), write a query to output a list of customers who have not paid their bills in the last 3 months.
Input is a string like "AAAAABBCCAA" and it should print "5A2B2C2A". 5 being the continuous number of occurance for character 'A'. Same is with other characters also.
1) Update the existing map without creating another map. 2) Write code to show the deadlock. 3) Find the maximum number from the given array. 4) Write the signature of service returning all the records from the provided table. 5) Explain about the Json format.
Difference between String and new String. How will the load be handled. I don't know who will ask these type of question while interviewing for java lead.
Can you store null as key or value in Hashmap
I didn't get unexpected questions. All question were related to my technical skills and to my previous working experience
Tell me about Java 8 features. After I mentioned in lambda expressions etc, he asked me, what is new with interfaces in Java-8.
Find the units of snow can be trapped in the given array of building of various heights. It is like 'Trapping Rain Water' problem in Leetcode
What is new in Java 9?
finally face to face. this is 6 hour long and they will decide very quick the result. First is a Java test. expect to write long java programs with pen and paper. should write code accurately no psudo code java code. some of the questions were insert node in tree, find the bug in single linked list which is looping. Heavy multi threading concurrency questions. thread contention, java 5+ concurrency API lots of multi threading in depth questions. somof the questions ae when java does context switching explain what happens in CPU level1,level2,level3 cache. how do you optmize hit miss on cpu cache with java threading. questions about DB partition sharding, network topology in cassandra, clearly Big 0 questions. java concurrency concurrency collections framework questions I was asked to write on white board function in java to recursively delete files and then in a directory tree. Java code with semi colons command and perfect syntax was expected. boundary conditions need to be handled. unit tests were asked to be written.
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