hCentive Automation QA interview questions

First round has questions over Super keyword This Inheritancce Priority of testng Webserives impl Testng priority dataprovider Test data generation Ui-- db- db2--log gui Hash table Key null in hash map ex Stale element exception Web driver frames Kinds of Testng annotations How to Close driver and Open driver Some question over Selenium Waits Second round was on selenium only, Scenarios :- In Selenium open website Select an element Type some data And Submit Now go to Profile Perform Drag n drop Check -- Selected checkbox Some evaluation on Table What all Exceptions you will face? What all Verifications you will put?