Online 1Z0-829 Practice Test

Question 1

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};

Options :

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

Question 2

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 :

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 3

Question ID: UK8295509

Given code of Test.java file:

package com.examtest.ocp;

public class Test {

public static void main(String[] args) {

String arr1 [], arr2, arr3 = null; //Line n1

arr1 = new String[2];

arr1[0] = "A";

arr1[1] = "B";

arr2 = arr3 = arr1; //Line n2

System.out.println(String.join("-", arr2)); //Line n3

}

What is the result?

Options :

A : Line n1 causes compilation error

B :

Line n2 causes compilation error

C :

Line n3 causes compilation error

D : It executes successfully and prints A-B on to the console

E : It executes successfully and prints B-A on to the console

F : It executes successfully and prints A on to the console

G : It executes successfully and prints B on to the console

Answer: B

Question 4

Question ID: UK8295123

Given code of Test.java file:

package com.examtest.ocp;

import java.util.ArrayList;

import java.util.List;

public class Test {

public static void main(String[] args) {

List<Character> list = new ArrayList<>();

list.add(0, 'E');

list.add('X');

list.add(1, 'P');

list.add(3, 'O');

if(list.contains('O')) {

list.remove('O');

}

for(char ch : list) {

System.out.print(ch);

}

What is the result?

Options :

A : Compilation error

B :

Runtime error

C : EPX

D : EXP

E : EPXO

F :

EXPO

Answer: B

Question 5

Question ID: UK8291953

Consider below code of Test.java file:

package com.examtest.ocp;

public class Test {

public static void main(String [] args) {

var text = """

I gave him $200 and \

he returned me €120, \

so I am left with £80.""";

System.out.println(

text.transform(Test::removeCurrencySymbols)

.transform(String::toUpperCase)

.formatted("¥", "¥", "¥"));

}

private static String removeCurrencySymbols(String s) {

return s.replaceAll("\\$", "%s")

.replaceAll("€", "%s")

.replaceAll("£", "%s");

}

What is the result?

Options :

A : An exception is thrown at runtime

B : I GAVE HIM ¥200 AND HE RETURNED ME ¥120, SO I AM LEFT WITH ¥80.

C : I gave him ¥200 and he returned me ¥120, so I am left with ¥80.

D : I GAVE HIM %S200 AND HE RETURNED ME %S120, SO I AM LEFT WITH %S80.

Answer: B

EXPERTY DESIGNED 1Z0-829 PRACTICE TEST