Java Database Connectivity (JDBC)

I have taken a j2ee brainbench test and following are the questions i cant figure out, can any one figure out the right answer?


Q1)Since ResultSet is NOT a serializable class, how do you pass data from one part or tier of a distributed application to another?
Choice 1
Read the ResultSet data and build the serializable object you need.
Choice 2
Use RowSet instead.
Choice 3
Data within the result set is what you need, not the entire result.
Choice 4
ResultSet has its own methods for converting to passable objects.
Choice 5
Serializability is not a requirement for passing data.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Q2)
Statement sql = con.createStatement();
ResultSet rs1 = sql.executeQuery(sqlString1);
ResultSet rs2 = sql.executeQuery(sqlString2);
String szValue1 = rs1.getString(1);
String szValue2 = rs2.getString(1);
What is the problem with the above sample code?
Choice 1
rs2 is invalid because rs1 was not closed before the second SQL.execute was called.
Choice 2
szValue1 is invalid because rs1 was closed when SQL.execute was called the second time.
Choice 3
szValue1 will be the same as szValue2.
Choice 4
szValue2 is invalid because a connection can only have one active resultset.
Choice 5
The second call to SQL.execute is invalid because the connection con was not closed.