Answers needed for these multiple choice questions

Question 1) Can you use the functions nvl and decode as well as the CASE statement interchangeably?

A Only NVL with DECODE and vice versa
B Only Decode with CASE statement and vice versa.
C NVL with Decode or CASE statement as well as Decode and Case Statement interchangeably
D All three can be used interchangeably

Question 2) An inner join

A Is preferred if it meets business requirements
B Requires a (+) sign in the sql syntax for Oracle
C Should never be used on dimensional metrics
D A and B
E A and C only

Question 3) You can use a Sub-select in a query after

A The FROM clause
B The IN clause
C The '=' operator
D All of the above
E All of the above and more

Question 4) Many to Many relationships:

A Result in double-counting
B May be resolved in different ways but using a relationship table is always preferred.
C Should be avoided as far as possible for simplicity
D All of the above
E A and C only

Question 5) Views:

A Often minimize re-work during the development or integration phase
B Can be used to implement security
C Can be materialized in recent versions of Oracle
D None of the above
E All of the above

ThanksWhy do you want us to GIVE you these answers? Why don't you study and do the homework yourself?|||I sure did a sincere attempt as far as homework goes also with a mixed success. For example, when I tried this on my database , I found that Question 1) could be D, Question 3) could be E and so on. And however, I may not be the strongest in logical reasoning, and hence seeking suggestions because second opinions and suggestions are valuable as they are. Atleast I will have a chance to correct myself in the chance that I may be wrong in what I thought or found. It is possible.

Thanks