Question 1

Given the code fragment:

You have been asked to define the ProductCode class. The definition of the ProductCode class must

allow c1 instantiation to succeed and cause a compilation error on c2 instantiation.

Which definition of ProductCode meets the requirement?

Options :

A :

B :

C :

D :

Answer: B

Question 2

Given the code fragment:

List<String> colors = Arrays.asList(“red”, “green”, “yellow”);

Predicate<String> test = n - > {

System.out.println(“Searching…”);

return n.contains(“red”);

};

colors.stream()

.filter(c -> c.length() >= 3)

.allMatch(test);

What is the result?

Options :

A :

Searching…

B :

Searching…

C :

Searching…

D :

A compilation error occurs.

Answer: C

Question 3

Given code of Test.java file:

1. package com.udayan.ocp;

2.

3. import java.util.ArrayDeque;

4. import java.util.Deque;

5.

6. public class Test {

7. public static void main(String[] args) {

8. Deque deque = new ArrayDeque<>();

9. deque.push(new Boolean("abc"));

10. deque.push(new Boolean("tRuE"));

11. deque.push(new Boolean("FALSE"));

12. deque.push(true);

13. System.out.println(deque.pop() + ":" + deque.peek() + ":" + deque.size());

14. }

15. }

What will be the result of compiling and executing Test class?

Options :

A : true:false:3

B : true:true:3

C : false:true:3

D : false:false:3

Answer: A

Question 4

Given:

and the code fragment:

Which two code fragments, when inserted at line n1 independently, enable the code to print

TruckCarBike?

Options :

A : .sorted ((v1, v2) -> v1.getVId() < v2.getVId())

B : .sorted (Comparable.comparing (Vehicle: :getVName)).reversed ()

C :

.map (v -> v.getVid())

.sorted ()

D : .sorted((v1, v2) -> Integer.compare(v1.getVId(), v2.getVid()))

E : .sorted(Comparator.comparing ((Vehicle v) -> v.getVId()))

Answer: A,D

Question 5

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?

Options :

A : The program prints employee IDs.

B : The program prints customer IDs

C : The program prints Error

D : compilation fails on line 13.

Answer: C

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