Day 13 Recap Questions
  1. What is struct in C?
  2. How are the fields of a struct passed into a function - by value or by reference?
  3. What is the size of a struct? What is structure padding in C?
  4. What is the difference between lifetime and scope of a variable?
  5. What is variable shadowing (i.e. hiding)?

  6. What is the output of the below program?

    #include <stdio.h>
int foo;
void bar() {
  int foo = 3;
  {
    extern int foo;
    printf("%d; ", foo);
    foo = 2;
  }
  printf("%d; ", foo);
}
void baz() { printf("%d; ", foo); }
int main() {
  {
    int foo = 5;
    bar();
    printf("%d; ", foo);
  }
  baz();
  return 0;
}
  7. Explain what srand and rand functions do exactly.