1) Largest Palindrom in a substring 2) Difference between wait and sleep in Thread 3) SQL join queries 4) Second largest employee salary SQL Query 5) First level and second level cache in hibernate 6) Difference between get and load methods in hibernate 7) Difference between stringbuffer and stringbuilder 8) What is DI and IOC in spring?

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Interview questions for Senior Software Engineer

1) Largest Palindrom in a substring - use two pointers approach
2) Difference between wait and sleep in Thread - wait releases the lock, sleep doesn't
3) SQL join queries - inner, outer, left, right, self joins
4) Second largest employee salary SQL Query - use subquery or order by and limit
5) First level and second level cache in hibernate - first level is session specific, second level is application wide
6) Difference between get and load methods in hibernate - get returns null if not found, load throws exception
7) Difference between stringbuffer and stringbuilder - stringbuffer is thread-safe, stringbuilder is not
8) What is DI and IOC in spring? - DI is dependency injection, IOC is inversion of control

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