SQL Function 3

Which of the following are  numeric functions ?

Which of the following is not a character function ?

What will be output of the following

SELECT CEIL(18.7), CEIL(-18.7), CEIL(0) FROM Dual;

What will be output of the following ?

SELECT CHR(65), CHR(97) FROM dual;

What will be output of the following

SELECT INITCAP('bullraider quiz') FROM Dual;

What will be output of the following
SELECT LENGTH('bullraider quiz') my_length FROM Dual;

What will be output of the following ?

SELECT SUBSTR('Bull Raider Quiz',-1,3) as quiz from dual ;

What will be output of the following ?

SELECT LPAD('Oracle',10,'.') lapd_doted from Dual, would return ....Oracle

Which of the following is not a  Conversion functions ?

Which of the following  are NULL-related functions?