16.
Which of following is not a valid name for a C variable?

17.
Find the output of the following program. void main() { int i=01289; printf("%d", i); }

18.
Find the output of the following program.
void main()
{
   int i=065, j=65;
   printf("%d %d", i, j);
}

19.
If ASCII value of 'x' is 120, then what is the value of the H, if
H = ('x' – 'w' ) / 3;

20.
What is the difference between a declaration and a definition of a variable?