Online 1Z0-809 Practice Test

Question 1

Given code of Test.java file:

1. package com.udayan.ocp;

2.

3. public class Test {

4. private static String msg = "Hello";

5.

6. private static String changeMsg(String m) {

7. msg = m;

8. return null;

9. }

10.

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

12. if(args.length == 0) {

13. assert false : changeMsg("Bye");

14. }

15. System.out.println(msg);

16. }

17. }

What will be the result of executing Test class with below command?

java -ea com.udayan.ocp.Test

Options :

A : Bye

B : Hello

C : AssertionError is thrown at runtime and program terminates abruptly

Answer: C

Question 2

Given the code fragment:

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 table has a column ID of type integer and the SQL query matches one record.

What is the result?

Options :

A :

Compilation fails at line 14.

B :

Compilation fails at line 15.

C :

The code prints the employee ID.

D : The code prints Error.

Answer: A

Question 3

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: A

Question 4

Given:

From what threading problem does the program suffer?

Options :

A : race condition

B : deadlock

C : starvation

D : livelock

Answer: B

Question 5

Given the content of Operator.java, EngineOperator.java, and Engine.java files:

and the code fragment:

What is the result?

Options :

A : The Engine.java file fails to compile

B : The EngineOperator.java file fails to compile

C : The Operator.java file fails to compile

D : ON OFF

Answer: A

EXPERTY DESIGNED 1Z0-809 PRACTICE TEST