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Q41. Which action can be used to load a database driver by using JDBC3.0? 

A. Add the driver class to the META-INF/services folder of the JAR file. 

B. Include the JDBC driver class in a jdbc.properties file. 

C. Use the java.lang.Class.forName method to load the driver class. 

D. Use the DriverManager.getDriver method to load the driver class. 

Answer:


Q42. Given the code fragment: 

List<Integer> codes = Arrays.asList (10, 20); 

UnaryOperator<Double> uo = s -> s +10.0; 

codes.replaceAll(uo); 

codes.forEach(c -> System.out.println(c)); 

What is the result? 

A. 20.0 

30.0 

B. 10 20 

C. A compilation error occurs. 

D. A NumberFormatException is thrown at run time. 

Answer:


Q43. Given the code fragment: 

Map<Integer, String> books = new TreeMap<>(); 

books.put (1007, “A”); 

books.put (1002, “C”); 

books.put (1001, “B”); 

books.put (1003, “B”); 

System.out.println (books); 

What is the result? 

A. {1007 = A, 1002 = C, 1001 = B, 1003 = B} 

B. {1001 = B, 1002 = C, 1003 = B, 1007 = A} 

C. {1002 = C, 1003 = B, 1007 = A} 

D. {1007 = A, 1001 = B, 1003 = B, 1002 = C} 

Answer:


Q44. Given: 

interface Rideable {Car getCar (String name); } 

class Car { 

private String name; 

public Car (String name) { 

this.name = name; 

Which code fragment creates an instance of Car? 

A. Car auto = Car (“MyCar”): : new; 

B. Car auto = Car : : new; 

Car vehicle = auto : : getCar(“MyCar”); 

C. Rideable rider = Car : : new; 

Car vehicle = rider.getCar(“MyCar”); 

D. Car vehicle = Rideable : : new : : getCar(“MyCar”); 

Answer:


Q45. Given: 

What is the result? 

A. Good Day! Good Luck! 

B. Good Day! Good Day! 

C. Good Luck! Good Day! 

D. Good Luck! Good Luck! 

E. Compilation fails 

Answer:


Q46. Given: 

public class MainMethod { 

void main() { 

System.out.println("one"); 

static void main(String args) { 

System.out.println("two"); 

public static void main(String[] args) { 

System.out.println("three"); 

void mina(Object[] args) { 

System.out.println("four"); 

What is printed out when the program is excuted? 

A. one 

B. two 

C. three 

D. four 

Answer:


Q47. Given the records from the Employee table: 

and given the code fragment: 

try { 

Connection conn = DriverManager.getConnection (URL, userName, passWord); 

Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, 

ResultSet.CONCUR_UPDATABLE); 

st.execute(“SELECT*FROM Employee”); 

ResultSet rs = st.getResultSet(); 

while (rs.next()) { 

if (rs.getInt(1) ==112) { 

rs.updateString(2, “Jack”); 

rs.absolute(2); 

System.out.println(rs.getInt(1) + “ “ + rs.getString(2)); 

} catch (SQLException ex) { 

System.out.println(“Exception is raised”); 

Assume that: 

The required database driver is configured in the classpath. 

The appropriate database accessible with the URL, userName, and passWord exists. 

What is the result? 

A. The Employee table is updated with the row: 

112 Jack 

and the program prints: 

112 Jerry 

B. The Employee table is updated with the row: 

112 Jack 

and the program prints: 

112 Jack 

C. The Employee table is not updated and the program prints: 

112 Jerry 

D. The program prints Exception is raised. 

Answer:


Q48. Given: 

public class Foo<K, V> { 

private K key; 

private V value; 

public Foo (K key, V value) (this.key = key; this value = value;) 

public static <T> Foo<T, T> twice (T value) (return new Foo<T, T> (value, value); ) 

public K getKey () (return key;) 

public V getValue () (return value;) 

Which option fails? 

A. Foo<String, Integer> mark = new Foo<String, Integer> (“Steve”, 100); 

B. Foo<String, String> pair = Foo.<String>twice (“Hello World!”); 

C. Foo<?, ?> percentage = new Foo <> (97, 32); 

D. Foo<String, String> grade = new Foo <> (“John”, “A”); 

Answer:


Q49. Given the definition of the Vehicle class: 

class Vehicle { 

String name; 

void setName (String name) { 

this.name = name; 

String getName() { 

return name; 

Which action encapsulates the Vehicle class? 

A. Make the Vehicle class public. 

B. Make the name variable public. 

C. Make the setName method public. 

D. Make the name variable private. 

E. Make the setName method private. 

F. Make the getName method private. 

Answer:


Q50. Given the code fragment 

Which code fragments, inserted independently, enable the code compile? 

A. t.fvar = 200; 

B. cvar = 400; 

C. fvar = 200; cvar = 400; 

D. this.fvar = 200; this.cvar = 400; 

E. t.fvar = 200; Test2.cvar = 400; 

F. this.fvar = 200; 

Test2.cvar = 400; 

Answer:


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