Synechron Interview Question

Round 1) Questions on multithreading concepts, DS, Core Java. Asked about Spring ( I said I don't have any experience but I'm willing to learn) Round 2) Covered lots of topics - SQL stored procedures, basic queries, SQL injection, Design patterns (explained singleton), some questions on LinkedList and searching, multithreading concepts. round 3) This was HR round where they asked about previous experience, the reason for the change, and some other basic questions.