On a 64 bits architecture, what does the following code print ?

  const char* s = "123456";
  printf("%zu\n", sizeof(s));

Note: "%zu" is indeed the correct way to print values of size_t type.

What does the following code excerpt print?

  int tab[] = { 2, 4, 6, 8, 10, 12 };
  putchar('1');
  int a = -1;
  int* p = tab + 2;
  while ((a = *p++) < 10) { printf("%d", a); }

Considering

 What happens if a system crashes while writing data without crash consistency mechanisms?

Which statement(s) is/are TRUE regarding the structure of two-level indexing?

In a three-level indexing system, the first level contains pointers to the second-level index blocks, which in turn point directly to data blocks.

Multi-level indexing in a file system is used to manage large files efficiently by breaking index structures into multiple levels.

If you open a file and add some data to it, which of the following information may be updated in the file's inode?

Consider the following five functions:

char* f1(char* s)
{
  s += 5;
  *s = 0;
  return s; 
}
char* f2(char* s1)
{
  char* s2 = s1;
  s2[5] = '\0';
  return s1; 
}
char* f3(char* s1)
{
  char s2[5] = s1;
  return s2;
}
char* f4(char* s)
{
  return strstr(s, "Hello");
}
char* f5(char* s1)
{
  char* s2 = NULL;
  strncpy(s2, s1, 5);
  return s2;
}

and consider the following variable:

char string[] = "Hello world!";

For each of the functions, choose the appropriate statement when called on string.

Consider the following variable: