Pergunta de entrevista da empresa BAE Systems

Jpa and hibernet diff.when we use hibernet ?when we use jpa? How to maintain connectionpooling?needs to know design pattern with examples.code quality and code formaters and tools for using unit testing.how you test the performance of your code?multi threading,synchronization,spring security,db designing of your project.what steps needs to take care while reviewing the code.scrum agile metholody ,jira.other than this they will ask the questions related the some scenarios.