Which is the lowest isolation level to ensure dirty reads can not happen

If you INNER JOIN tableA (which has 10 rows) with tableB (which has 5 rows), what is the smallest possible amount of rows that can be returned?

Which of the following statements about indexes is NOT correct?

Which is the only proven way to prevent SQL Injection

Which of these is not a valid constraint?

How many clustered indexes can a table have?

Consider two tables A and B,  having only one column each and having these values:

A = [0, 1, 2, 3, 4, 5]

B = [5, 6, 7, 8, 9, 10]

The result of the UNION ALL operator on these tables will be?

To speed up searches in tables we can?

Which of the following clauses can be included in SELECT to fetch 10 records only? (Check all that apply)

To create a column in a table with a fixed length(n) string, which of the following data type is recommended?