Free Practice Oracle 1Z0-829 Exam Questions 2025

Stay ahead with 100% Free Java SE 17 Developer 1Z0-829 Dumps Practice Questions

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Total 660 Questions | Updated On: Jun 05, 2022

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Question 1

Given:

Which two method invocation execute?

A : IFace myclassobj = new Myc ();myclassObj.m3 ();

B : Ifnce.m3 ();

C : iFace mucloassObj = new Myc ();myClassObj.m4();

D : new MyC() .m2 ();

E : IFace .,4():

F : IFace.m2();

Answer: D,E

Question 2

Question ID: UK8293374

Which of the following are Java Exception classes?

Choose 3 options.

A : ClassCastException

B : NullException

C : NumberFormatException

D : IllegalArgumentException

E : ArrayIndexException

Answer: A,C,D

Question 3

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 4

Given the content of the in. tart file:

23456789

and the code fragment:

What is the content of the out .txt file?

A : 01234567801234

B : 012345678

C : 0123456789234567

D : 0123456789

E : 012345678901234

F : 01234567

Answer: D

Question 5

Question ID: UK8292860

Given code of Test.java file:

package com.examtest.ocp;

class Car {

void speed(Byteval) { //Line n1

System.out.println("DARK"); //Line n2

} //Line n3

void speed(byte... vals) {

System.out.println("LIGHT");

}

public class Test {

public static void main(String[] args) {

byte b = 10; //Line n4

new Car().speed(b); //Line n5

}

Which of the following needs to be done so that LIGHT is printed on to the console?

A : No changes are required as given code prints LIGHT on execution

B : Delete Line n1, Line n2 and Line n3

C : Replace Line n4 with byte... b = 10;

D : Replace Line n5 with new Car().speed((byte...)b);

Answer: B

Page: 1 / 132

Total 660 Questions | Updated On: Jun 05, 2022

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