Union in c 10

Which of the following are collection of different data types

• string

• char

• float

• union

size of union is size of the longest data member in the union

• True

• false

The size of the following union, where an int occupies 4 bytes of memory is

union demo
{
  float x;
  int y;
  char z[10];
};

• 10

• 8

• 7

• 4

Size of a structure is determined by size of the.

• First member in the structure

• Last member in the structure

• Sum of the sizes of all members

• sizes of largest members

Union differs from structure in the following way

• Only one member can be used at a time

• Union cannot have more members

• Union initialized all members as structure

• all members are used at a time

Int main()

{ union var { int a, b; };

union var v;

v.a=10;

v.b=20;

printf("%d\n", v.a);

return 0; }

• 10

• 30

• 20

• all

int main(){  
struct number  
{
    int no;
    char name[20];
  };
  struct number s;
  s.no = 50;
  printf("%d", s.no);
}

• 5

• 3

• 50

• Compile time error