UST Senior Java Developer Interview Questions and Answers

A Spring Boot REST controller is used to handle incoming HTTP requests and return appropriate responses.

• Create a new Java class annotated with @RestController

• Define request mapping annotations like @GetMapping, @PostMapping, @PutMapping, @DeleteMapping

• Inject dependencies using @Autowired annotation

• Return response using ResponseEntity or directly as method return value

Code to reverse a comma separated string in Java

• Split the input string by comma to get an array of strings

• Iterate through the array in reverse order and append each element to a new string with a comma

• Return the reversed comma separated string