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: UK8298130
Consider below code of Test.java file:
package com.examtest.ocp;
 
class A {
    public String toString() {
        return null;
    }
}
 
public class Test {
    public static void main(String [] args) {
        String text = null;
        text = text + new A(); //Line n1
        System.out.println(text.length()); //Line n2
    }
}
What is the result?

Options :
Answer: A

Question 2

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 3

Question ID: UK8296802
Given code:
package com.examtest.ocp;
 
class A {
    A() {
        System.out.print(1);
    }
    class B {
        B() {
            System.out.print(2);
        }
    }
}
 
public class Test {
    public static void main(String [] args) {
        B obj = new A().new B();
    }
}
What is the result?

Options :
Answer: A

Question 4

Question ID: UK8291525
Below is the code of TestSellable.java file:
package com.examtest.ocp;
 
interface Sellable {
    double getPrice();
}
 
public class TestSellable {
    private static void printPrice(Sellable sellable) {
        System.out.println(sellable.getPrice());
    }
 
    public static void main(String[] args) {
        /*INSERT*/
    }
}
Which of the following options can replace /*INSERT*/ such that there are no compilation errors?
Choose 3 options.

Options :
Answer: A,D

Question 5

Given the content of the in. tart file:

23456789

and the code fragment:




What is the content of the out .txt file? 

Options :
Answer: D

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