Answer / saranya

union elements share common memory space

Answer / anandi

Union elements can share the common memory spaces.

For eg.

union stu
{
int rno;
int mark;
float total;
};

In this pg, the compiler allocates 4 bytes to store the
union members. Bcoz, in this pg, the float data type only
requires the large memory size, ie, 4 bytes. And the
remaining members can share this 4 bytes. So if u want to
store rno, it will allocate the first 2 bytes.
And also we can store only one value at a time to the
memory.

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