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EXPERTY DESIGNED 1Z0-829 PRACTICE TEST

Oracle 1Z0-829 Exam Questions
Total Questions: 660
Java SE 17 Developer
Updated On: Dec 07, 2025
Page : 1-66
Question 1

Question ID: UK8292005
Given code of Test.java file:
package com.examtest.ocp;
 
public class Test<T> {
    private T t;
 
    public T get() {
        return t;
    }
 
    public void set(T t) {
        this.t = t;
    }
 
    public static void main(String args[]) {
        Test obj = new Test();
        obj.set("OCP");
        obj.set(85);
        obj.set('%');
 
        System.out.println(obj.get());
    }
}
What is the result?

Options :
Answer: D
Question 2

Question ID: UK8297735
Given code of Test.java file:
package com.examtest.ocp;
 
public class Test {
    enum TrafficLight {
        private String message;
        GREEN("go"), AMBER("slow"), RED("stop");
        
        TrafficLight(String message) {
            this.message = message;
        }
        
        public String getMessage() {
            return message;
        }
    }
    
    public static void main(String[] args) {
        System.out.println(TrafficLight.AMBER.getMessage().toUpperCase());
    }
} 
What is the result?

Options :
Answer: C
Question 3

Question ID: UK8298570
Consider below code of Test.java file:
package com.examtest.ocp; 
 
public class Test extends String {
    @Override
    public String toString() {
        return "TEST";
    }
    
    public static void main(String[] args) {
        Test obj = new Test();
        System.out.println(obj);
    }
}
What is the result?

Options :
Answer: D
Question 4

Question ID: UK8296869
Given code of Test.java file:
package com.examtest.ocp;
 
class Parent {
    int var = 1000; // Line n1
 
    int getVar() {
        return var;
    }
}
 
class Child extends Parent {
    private int var = 2000; // Line n2
 
    int getVar() {
        return super.var; //Line n3
    }
}
 
public class Test {
    public static void main(String[] args) {
        Child obj = new Child(); // Line n4
        System.out.println(obj.var); // Line n5
    }
}
There is a compilation error in the code.
Which three modifications, done independently, print 1000 on to the console?

Options :
Answer: A,B,D
Question 5

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
Page : 1-66

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