This was the class I was asked to compile [ {“id”:”13898626620004”,”value”:”bar”,”category”:”cars"}, {“id”:”13898626620001”,”value”:”qux”,”category”:”boats"}, {“id”:”13898626620005”,”value”:”foo”,”category”:”bus"}, ……..>10 GB more ] read from s3, insert into a relational database, count the records in each category. public interface IOUtils{ public InputStream getFileFromS3(String name); public void insertRecord(Record record); } public interface Record{ public void parseRecordFromJsonString(jsonString); public String getId(); public String getValue(); public String getCategory(); } public interface print ( getId(): getValue(): print size+ Value + Id