SoftSages Technology interview questions

reverse string, find 1st duplicate characters , types of DI , internal working of hashmap , about your projects and cv, @controller & @restcontroller difference , which is best @Autowired , constructor based or setter based injection , mainly question was from spring boot as my profile . I answered all but in coding questions I did syntax mistake as used online complier not any IDE . he said you lag in practical coding but your concepts are strong . let's see if i get next round call IDK.