1) 
BO 5.1.2 had no Infoview.
BO 6.5.1 included Infoview, but no Crystal Report, CMC not 
present, instead Supervisor(thick client) was used for 
giving Users rights.
BO XI includes intgration with Crystal Reports, CMC (THin 
Client) for managing Users, security and Profiles
2)
Oracle 9i includes Bulk Inserts
Index Rename and Table Rename.

3) SQL is a 4 GL(Generation Language)
Pl/SQL is a 3 GL

5) Prompts are used for asking the user for Dynamic Inputs 
while refreshing the Report.

9) Yes we can create reports without creating Universe.

4) Broad cast agent is used schedule the reports through web
intellienges

8) ad-hoc reports means with in the orgainsation user can
create reports by directly interact with IT peoples. That is
time  depended reports not detailed reports

5)prompt is an enduser object,which allows the valus or 
entering the values to restrict the data displayed in 
document.
4)Broad cast agent is refresh data and schedule the data in 
report level.
6)master detail format means section,section means 
eliminate tha duplicates and display data in seperate block 
in the form of master detail relationship.
7)you can reduce the calculation and conditions in the 
report 
2) you can limit the cut copy phaste operations for user's
3) you can limit access no of report's at peek time you can 
improve performence at report level

in model:

1)you can remove loop's at that time you can improve 
performence at model level
2)use indexces you can improve performence