EXPERTY DESIGNED 1Z0-809 PRACTICE TEST

Oracle 1Z0-809 Exam Questions
Total Questions: 469
Java SE 8 Programmer II
Updated On: Jan 15, 2026
Page : 1-47
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 :
Answer: C

Question 2

Given the code fragment:

Untitled1-page69-image23
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 :
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 :
Answer: A

Question 4

Given:

Untitled1-page69-image101
From what threading problem does the program suffer?

Options :
Answer: B

Question 5

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


1

and the code fragment:

2

What is the result? 

Options :
Answer: A

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