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
Did you work on any caching technologies
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.
About the topics as mentioned in description. Gave one little code using lambda expression to find the problem. Then gave another code & asked to reduce its number of lines to one line using jdk8 feature.
What if we insert with key null to a HashMap?
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