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EXPERTY DESIGNED 1Z0-829 PRACTICE TEST

Oracle 1Z0-829 Exam Questions
Total Questions: 660
Java SE 17 Developer
Updated On: Jan 13, 2026
Page : 1-66
Question 1

Question ID: UK8291153
Given code of Test.java file:
package com.examtest.ocp;
 
import java.util.ArrayList;
import java.util.List;
 
class Person {
    private String name;
    private int age;
    
    Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    
    public String toString() {
        return "Person[" + name + ", " + age + "]";
    }
    
    public boolean equals(Person obj) {
        if(obj instanceof Person) {
            Person person = (Person)obj;
            if(this.name.equals(person.name) && this.age == person.age) {
                return true;
            }
        }
        return false;
    }
}
 
public class Test {
    public static void main(String[] args) {
        List<Person> persons = new ArrayList<>();
        persons.add(new Person("Liam", 25));
        persons.add(new Person("Liam", 27));
        persons.add(new Person("Liam", 25));
        persons.add(new Person("Liam", 25));
        
        persons.remove(new Person("Liam", 25));
        
        for(Person person : persons) {
            System.out.println(person);
        }
    }
}
What is the result?

Options :
Answer: D
Question 2

Question ID: UK8291961
Consider below statements:
1. int x = 5____0;
2. int y = ____50;
3. int z = 50____;
4. float f = 123.76_86f;
5. double d = 1_2_3_4;
How many statements are legal?

Options :
Answer: C
Question 3

Question ID: UK8297797
Given code:
package com.examtest.ocp;
 
import java.util.ArrayList;
import java.util.List;
 
public class Test {
    public static void main(String[] args) {
       var list = new ArrayList<String>(); //Line n1
       list.add("A");
       list.add("M");
       var list_of_list = List.of(list); //Line n2
       list_of_list.get(0).set(1, "N"); //Line n3
       list_of_list.get(0).forEach(System.out::print); //Line n4
    }
}
What is the result?

Options :
Answer: D
Question 4

Question ID: UK8294682
Consider below codes of 3 java files:
//Shrinkable.java
package com.examtest.ocp;
 
public interface Shrinkable {
    public static void shrinkPercentage() {
        System.out.println("80%");
    }
}
//AntMan.java
package com.examtest.ocp;
 
public class AntMan implements Shrinkable { }


//Test.java
package com.examtest.ocp;
 
public class Test {
    public static void main(String[] args) {
        AntMan.shrinkPercentage();
    }
}
Which of the following statements is correct?

Options :
Answer: C
Question 5

Question ID: UK8292809
Consider below code of Test.java file:
package com.examtest.ocp; 
 
public class Test {
    public static void main(String[] args) {
        System.out.println(add(90, 7));
        System.out.println(add('a', 1)); //ASCII code for 'a' is 97 and 'b' is 98
    }
    
    public static var add(int v1, int v2) {
        return v1 + v2;
    }
}
What is the result?

Options :
Answer: A
Page : 1-66

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