Which TWO runlevels should never be declared as the default runlevel? 06/14/2017 – by Mod_GuideK 0 Which TWO runlevels should never be declared as the default runlevel? A. 0 B. 3 C. 5 D. 6 SHOW ANSWERSCorrect Answer: AD Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.