HCL- Crystal Report Interview Questions

Database:
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1. What is unique?
2. What you mean by primary key
3. What you mean by trigger/stored procedure/
4. What is the different between delete and truncate
5. Is it possible null in primary key
6. How much null possible in unique
7. What is compound key?
8. What are indexes?
9. What is normalization?
10. For design crystal report which one is best is view or stored procedure?

Crystal Report:
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1. What are the sessions in crystal report?
2. What is the Sub-report?
3. What is cross-tab and which session it place?
4. What you mean by running total field?
5. What you mean by Summary and difference with running total field?
6. If changed happened in table after design crystal report, how to solve
7. What is Select Expert?
8. What are difference between Hide and supress?
9. What is saving with Report and Purpose?
10. What is Chart?
11. What is Parameter Field?
12. What is Hierarchical Grouping option?
13. How to display Sql query in crystal report
14. I created one Select Expert, if i open query is it display with select expert?
Ex:
I am using student table ->
Show sql query is "select * from student"
If created Select Expert like student.rno-> "is eqal to 1”, what will be my sql query?
15. How to get stored procedure object in Database Expert.( Some time we can only display table and view , how to display Stored Proc)?