Deloitte QA Automation Engineer interview questions

3 Technical Round then HR or mangerial round Round 1-Intro, one easy java progarm,alert,oops conecpt Round 2-Intro,how to handle windows,collection,diff bet char and character ,diff bet int and Integer in collection,groups in testng,gherkin keywords,data provider,testng annotations round3- how to manage window,collection-map,list,set, action class,hasmap ,hashtable,logic for finding duplicate characters,query parameters in headers,diff bet authentication and autherization,how to pass authentication,why we use joints,constants,