Java SE 8 Programmer II — Question 149

Given the code fragment:
9. Connection conn = DriveManager.getConnection(dbURL, userName, passWord);
10. String query = "SELECT id FROM Employee";
11. try (Statement stmt = conn.createStatement()) {
12. ResultSet rs = stmt.executeQuery(query);
13. stmt.executeQuery("SELECT id FROM Customer");
14. while (rs.next()) {
15. //process the results
16. System.out.println("Employee ID: "+ rs.getInt("id"));
17. }
18. } catch (Exception e) {
19. System.out.println ("Error");
20. }
Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWord exists.
The Employee and Customer tables are available and each table has id column with a few records and the SQL queries are valid.
What is the result of compiling and executing this code fragment?

Answer options

• A. The program prints employee IDs.
• B. The program prints customer IDs.
• C. The program prints Error.
• D. compilation fails on line 13.

Correct answer: C

Explanation

The correct answer is C because the code attempts to execute a second query (line 13) without properly handling the ResultSet from the first query, which leads to an exception. The other options are incorrect as the program does not reach a point where it can print valid IDs or compile successfully due to the error.