Which of the following are typical indications of a boot process fail situation?

A.
An automatic reboot

B.
Complete lock-up

C.
A blank screen

D.
A blue error screen

E.
All of the above

Explanation:
Each one of the above mentioned conditions point to a failed boot process.
References:
David Groth and Dan Newland, A+ Study Guide, 2nd Edition, Alameda , Sybex, 2004, p. 777 -779.
James G. Jones, Craig Landes, A+ Exam Cram, 2nd Edition, Que Publishing, Indianapolis , 2003,
Chapter 16