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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: UK8295913
Given code of Test.java file:
package com.examtest.ocp;
 
record Rectangle(double length, double width) {}
 
record Square(double side) extends Rectangle {}
 
public class Test {
    public static void main(String[] args) {
        Square sq = new Square(10.0);
        System.out.println(sq);
    }
}
What is the result?

Options :
Answer: A
Question 2

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 3

Question ID: UK8292860
Given code of Test.java file:
package com.examtest.ocp;
 
class Car {
    void speed(Byteval) { //Line n1
        System.out.println("DARK"); //Line n2
    } //Line n3
 
    void speed(byte... vals) {
        System.out.println("LIGHT");
    }
}
 
public class Test {
    public static void main(String[] args) {
        byte b = 10; //Line n4
        new Car().speed(b); //Line n5
    }
}
Which of the following needs to be done so that LIGHT is printed on to the console?

Options :
Answer: B
Question 4

Question ID: UK8297291
Consider below code snippet:
var x = Double.valueOf(Math.random() * 10).intValue();
System.out.println(x);
Which of the following statements is correct?

Options :
Answer: D
Question 5

Given code of Test.java file:
package com.examtest.ocp;

public class Test {
    private static String print(String... args) {
        return String.join("-", args); //Line n1
    }
    
    private static Object print(Object... args) {
        String str = "";
        for(Object obj : args) {
            if(obj instanceof String) { //Line n2
                str += (String) obj; //Line n3
            }
        }
        return str; //Line n4
    }
    
    public static void main(String... args) {
        Object obj1 = new String("SPORT"); //Line n5
        Object obj2 = new String("MAD"); //Line n6
        System.out.println(print(obj1, obj2)); //Line n7
    }
}
What is the result?

Options :
Answer: A
Page : 1-66

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