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?
Click on the arrows to vote for the correct answer
A. B. C. D.C.
The given code fragment is attempting to connect to a database, execute two different SQL SELECT queries, and print out the results of the first query to the console. Here is a detailed explanation of what the code does:
Line 9: The code attempts to establish a connection to a database using the dbURL, userName, and passWord variables.
Line 10: A string variable named query is created with an SQL SELECT statement to retrieve the id column from the Employee table.
Line 11-18: A try-with-resources block is used to create a new Statement object and execute the query on the database connection. The resulting ResultSet object is stored in a variable named rs. Then, another SQL SELECT query is executed on the same statement object, which returns a ResultSet but does nothing with it. Next, a while loop is used to iterate through each row of the rs ResultSet, and the value of the id column is printed to the console using System.out.println.
Line 19-20: If any exception is caught, the message "Error" is printed to the console.
Assuming that the code compiles without any errors, there are two possible outcomes based on the assumptions mentioned in the question:
If the Employee table has records and the query on line 12 is valid, the program will print the id of each employee to the console. The program will then exit normally without printing "Error".
If the Employee table has no records or the query on line 12 is invalid, the program will not print any output to the console. Instead, it will catch an exception and print "Error" before exiting.
Option A is the correct answer because the program will print employee IDs to the console if the Employee table has records and the query on line 12 is valid. Therefore, the program will exit normally without printing "Error".