Q1, Consider table T1 with following data: a1 a2 a3 1 2 3 1 2 3 1 NULL NULL 1 NULL NULL how many rows will be retrieved by the following SQL statement? select count(*) from T1 where ((a3 = 3) OR (a2 <> 2));

1. 4

2. 2

3. 0

4. 1

Q2. What truth value will be returned by SQL for the expression NOT (a OR (NOT a)). Assume that column a has NOT NULL constraint.

1. True

2. False

3..Unknown