in which three cases does a checkpoint occur? (choose three)
a. every three minutes.
b. when a log switch occurs.
c. when forces by an administrator.
d. when a tablespace is taken offline normal.
e. when the redo buffer is one-third full.
answer: b, d, e

you are using rman to perform a closed database backup of your database. you issue
these rman commands:
startup mount;
backup
format ‘/backup/df_%d_%s_%p.bus’
database filesperset = 2;
which components are included in the backup?
a. only the data files.
b. only the data files and the online logs.
c. the data files, control files, and the online logs.
d. the data files and control files, but not the online logs.
answer: d