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EXPERTY DESIGNED 1Z0-829 PRACTICE TEST

Oracle 1Z0-829 Exam Questions
Total Questions: 660
Java SE 17 Developer
Updated On: Nov 11, 2025
Page : 1-66
Question 1

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
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: UK8298565
Consider below code of Test.java file:
package com.examtest.ocp; 
 
public class Test {
    public static void main(String[] args) {
        String str = "*";
        /*INSERT*/
        System.out.println(str);
    }
}
Which of the following options, if used to replace /*INSERT*/, will compile successfully and on execution will print ***** on to the console?
Choose 2 options.

Options :
Answer: A,B
Question 4

Question ID: UK8292097
Below is the code of Test.java file:
package com.examtest.ocp;
 
import java.util.*;
 
public class Test {
    public static void main(String[] args) {
        var list = new ArrayList<>(); //Line n1
        list.add("TAKE");
        list.add("THE");
        list.add("RISK");
 
        System.out.println(String.join(".", list)); //Line n2
    }
}
What is the result?

Options :
Answer: B
Question 5

Question ID: UK8291585
Given code of Test.java file:
package com.examtest.ocp;
 
public class Test {
    public static void main(String[] args) {
        var i = 1;
        var j = 5;
        var k = 0;
        A: while(true) {
            i++;
            B: while(true) {
                j--;
                C: while(true) {
                    k += i + j;
                    if(i == j)
                        break A;
                    else if (i > j)
                        continue A;
                    else 
                        continue B;
                }
            }
        }
        System.out.println(k);
    }
}
What is the result?

Options :
Answer: A
Page : 1-66

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