###### tags: `Xerovit - Notes`
# Interview
## API Response Status Codes
* 200
* 201
* 301
* 400
* 401
* 403
* 404
* 500
## HTTP Methods
* PUT
* DELETE
* GET
* POST
```java=
// Write Code Here
class User {
public String userName;
}
class App {
public static void main(String... args) {
User user = new User();
System.out.println(user.userName);
updateName(user);
System.out.println(user.userName);
}
public static void updateName(User u) {
u.userName = "Testing";
}
}
```