Infosys Interview Question

What is @Primary How to create a HQL query? Difference between spring and spring boot? versions of spring and spring boot Why functional interface are introduced? WHat is Diff between @Component and @Bean? intermediate operationad and ternate operations What is seralizeation and deserilization? Where we are storing the serilized data locally or globally? Java 11 features Why they have introduced runnable when we have Thread class? DIff between runnable and thread.