Java: oops concepts in java? how do you initialise private elements of a class? Ways to define strings in java? exceptions in java? difference between exception and error? checked and unchecked exception? API testing: How will you test a POST query? drawbacks of api testing? Questions on response codes? Selenium: difference between assert and verify? drawbacks of selenium? implicit and dynamic wait? types of testing supported by selenium? types of x-path? SQL: Select Query in SQL