16. - Java:
Score: 5
Qualitative Assessment: Average
Description: Varun did not provide sufficient details to assess his expertise in Java, which is critical for the role. He should discuss specific projects and contributions.

17. - Core Java:
Score: 5
Qualitative Assessment: Average
Description: Similar to Java, Varun's expertise in Core Java was not adequately showcased. More detailed examples are needed.

18. - REST API design:
Score: 4
Qualitative Assessment: Needs Improvement
Description: Varun did not mention any specific experiences with REST API design, which is a key requirement for the role.

19. - Microservice Architecture:
Score: 4
Qualitative Assessment: Needs Improvement
Description: There was no mention of Varun's experience with microservice architecture, despite its relevance to the job description.

20. - Unit Testing / Test Coverage:
Score: 4
Qualitative Assessment: Needs Improvement
Description: Varun did not provide information on his experience with unit testing or test coverage, areas important for the role.