Deloitte Core Java Analyst interview questions

Interview process was Easy, Java 8 features , Lambda expressions, Functional interface, Optional class, How to achieve Immutability, SCP area Heap area Fibonacci program, Rest APi Post Put Get Delete Patch @Qualifer Annotation HashMap internal working and HashMap related program Can you have try with catch ? Have you worked on any feature that helped client? How you worked on 8 story points ?