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: Aug 24, 2026

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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?

A : Line n1 causes compilation error

B : Line n2 causes compilation error

C : Line n3 causes compilation error

D : Line n7 causes compilation error

E : Code compiles successfully and on execution prints SPORTMAD on to the console

F : Code compiles successfully and on execution prints SPORT-MAD on to the console

G : An exception is thrown at runtime

Answer: A

Question 2

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

Question 3

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?

A : Output is any int value between 1 and 10

B : Output is any int value between 1 and 9

C : Output is any int value between 0 and 10

D : Output is any int value between 0 and 9

Answer: D

Question 4

Question ID: UK8291180

Given code of Test.java file:

package com.examtest.ocp;

sealed abstract class Animal permits Cat, Dog { } //Line n1

non-sealed class Cat extends Animal { } //Line n2

final class Dog extends Animal { } //Line n3

final class Tiger extends Animal { } //Line n4

public class Test {

public static void main(String [] args) {

System.out.println("PERMITS CLAUSE");

}

What is the result?

A : Given code compiles successfully and on execution prints PERMITS CLAUSE

B : Line n1 causes compilation error

C : Line n2 causes compilation error

D : Line n3 causes compilation error

E : Line n4 causes compilation error

Answer: A

Question 5

Question ID: UK8295518

How many of the below code statements, written inside main method will compile successfully?

1. var arr1 = new int[]{10};

2. var arr2 = new String[][] {};

3. var arr3 = new char[][] {{}};

4. var arr4 = {10, 20, 30};

5. var arr5 = new String[][] {new String[]{"LOOK"}, new String[] {"UP"}};

6. var [] arr6 = new int[] {2, 3, 4};

A : None of the statements compile successfully

B : Only 1 statement compiles successfully

C : 2 statements compile successfully

D : 3 statements compile successfully

E : 4 statements compile successfully

F : 5 statements compile successfully

G : All 6 statements compile successfully

Answer: A

Page: 1 / 132

Total 660 Questions | Updated On: Aug 24, 2026

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