Type casting char pointer to be of type struct pointer [closed]

Okay, well, I've narrowed down my question to spesific problem by removing questions related to inotify API.

I needed to be able to detect file changes, so I started learning the Linux inotify API. I searched for tutorials online and found one written by IBM (https://developer.ibm.com/tutorials/l-ubuntu-inotify). As I read the article and learned from it, the example code became very confusing.

From my understanding (These are not questions that I'm asking):

1. EVENT_SIZE: Is basically defines size of inotify_event struct which is 16 byte
2. struct inotify_event *event = ( struct inotify_event ∗ ) &buffer[ i ];: Here, a char pointer is cast as an inotify_event struct and later used as if like normal struct. How is that possible? Isn't this code prone to Undefined behaviours and Strict Aliasing problems?
3. i += EVENT_SIZE + event‑>len: Why are we increasing the index by EVENT_SIZE + event->len? I really don't understand. Is it because when casting an element of a char array to a struct, the selected element behaves like a starting offset or something?

Okay I'm asking two related question :>, Is using char array safe to store struct data? If it is safe in the code below, how does this process work?

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/inotify.h>

#define EVENT_SIZE  ( sizeof (struct inotify_event) )
#define BUF_LEN     ( 1024 * ( EVENT_SIZE + 16 ) )

int main( int argc, char **argv ) 
{
  int length, i = 0;
  int fd;
  int wd;
  char buffer[BUF_LEN];

  fd = inotify_init();

  if ( fd < 0 ) {
    perror( "inotify_init" );
  }

  wd = inotify_add_watch( fd, "/home/strike", 
                         IN_MODIFY | IN_CREATE | IN_DELETE );
  length = read( fd, buffer, BUF_LEN );  

  if ( length < 0 ) {
    perror( "read" );
  }  

  while ( i < length ) {
    struct inotify_event *event = ( struct inotify_event * ) &buffer[ i ];
    if ( event‑>len ) {
      if ( event‑>mask & IN_CREATE ) {
        if ( event‑>mask & IN_ISDIR ) {
          printf( "The directory %s was created.\n", event‑>name );       
        }
        else {
          printf( "The file %s was created.\n", event‑>name );
        }
      }
      else if ( event‑>mask & IN_DELETE ) {
        if ( event‑>mask & IN_ISDIR ) {
          printf( "The directory %s was deleted.\n", event‑>name );       
        }
        else {
          printf( "The file %s was deleted.\n", event‑>name );
        }
      }
      else if ( event‑>mask & IN_MODIFY ) {
        if ( event‑>mask & IN_ISDIR ) {
          printf( "The directory %s was modified.\n", event‑>name );
        }
        else {
          printf( "The file %s was modified.\n", event‑>name );
        }
      }
    }
    i += EVENT_SIZE + event‑>len;
  }

  ( void ) inotify_rm_watch( fd, wd );
  ( void ) close( fd );

  exit( 0 );
}