Free Oracle 1Z0-829 Exam Questions

Become Oracle Certified with updated 1Z0-829 exam questions and correct answers

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Total 660 Questions | Updated On: Jul 01, 2026

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Question 1

Question ID: UK8296889

Given code of Test.java file:

package com.examtest.ocp;

class GrandParent {}

class Parent extends GrandParent {}

class Child extends Parent {}

class GrandChild extends Child {}

public class Test {

public static void main(String... args) {

GrandParent obj = new Child();

if(!(obj instanceof GrandChild gc)) {

System.out.print("Not a GrandChild");

/*INSERT-1*/

}

/*INSERT-2*/

System.out.println(gc); //Line n2

}

And the statements:

1. Above code causes compilation error

2. Above code compiles successfully and prints: Not a GrandChild

3. To resolve compilation error, replace /*INSERT-1*/ with return;

4. To resolve compilation error, replace /*INSERT-2*/ with else

How many of the above statements is/are correct?

A : Only one statement

B : Only two statements

C : Only three statements

D : None of the statements

Answer: C

Question 2

Question ID: UK8298155

Following statement in a Java program compiles successfully:

student.report(course);

What can you say for sure?

A : student is the reference variable name

B : student is the class name

C : report is the method name

D : course must be of String type

Answer: C

Question 3

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?

A : There is a compilation error in Shrinkable.java file

B : There is a compilation error in AntMan.java file

C : There is a compilation error in Test.java file

D : There is no compilation error and on execution, Test class prints 80% on to the console

Answer: C

Question 4

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.

A : str.repeat(5);

B : str = str.repeat(5);

C : String.repeat(str, 5);

D : str = String.repeat(str, 5);

E : str *= 5;

F : str = str * 5;

G : for(var var = 0; var < 4; var++) { str += "*";}

H : for(var var = 0; var < 4; var++) { str += "*";}

I : for(int i = 0; i < 5; i++) { str += "*";}

Answer: A,B

Question 5

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.

A : printPrice(null);

B : printPrice(new Sellable());

C : printPrice(new Sellable() {});

D : printPrice(new Sellable() { @Override public double getPrice() { return 45.34; }});

E : var obj = new Sellable() { @Override public double getPrice() { return 20.21; } public Sellable getThisObject() { return this; }};printPrice(obj.getThisObject());

Answer: A,D

Page: 1 / 132

Total 660 Questions | Updated On: Jul 01, 2026

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