C languages questions with answer

(q) What will be output of the following program?void main(){long int _=5l;printf("%ld",_);getch();}Output: 5Explanation:Underscore is valid keyword in c.(q) What will be output of the following program?void main(){char * __WORLD__="world";clrscr();printf("%s ",__WORLD__);getch();}Output: worldExplanation:__WORLD__ is valid identifier in c programming language. But we should not write variable