Explanation:
Data files and control files should be included in a closed database backup taken with operating system commands. Incorrect Answer:
3: It is not required that password file should be included in a closed database backup taken with operating system commands.
4: Online redo log files are not backed up in a closed database backup taken with operating system commands.
5: It is not required that initialization parameter file should be included in a closed database backup taken with operating system commands.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 241-244
Chapter 10: User-Managed Backups

---