Question 1

What will be the result of compiling and executing Test class?

package com.udayan.oca;

import java.util.ArrayList;

import java.util.List;

public class Test {

public static void main(String[] args) {

List list = new ArrayList<>();

list.add(100);

list.add(7);

list.add(50);

list.add(17);

list.add(10);

list.add(5);

list.removeIf(a -> a % 10 == 0);

System.out.println(list);

}

Options :

A : [7, 17, 5]

B : [100, 50, 10]

C : [100, 7, 50, 17, 10, 5]

D : Compilation error

E : Runtime Exception

Answer: A

Question 2

Which of the following is not a valid array declaration?

Options :

A : int arr4[][] = new int[][8];

B : int [] arr1 = new int[8];

C : int [] arr3 [] = new int[8][];

D : int [][] arr2 = new int[8][8];

Answer: A

Question 3

What will be the result of compiling and executing Test class?

package com.udayan.oca;

public class Test {

private static void add(double d1, double d2) {

System.out.println("double version: " + (d1 + d2));

}

private static void add(Double d1, Double d2) {

System.out.println("Double version: " + (d1 + d2));

}

public static void main(String[] args) {

add(10.0, null);

}

Options :

A : Double version: 10.0

B : An exception is thrown at runtime

C : Compilation error

Answer: B

Question 4

Examine the content of App.java:

Which is true?

Options :

A : The App.class file is stored within the p1 folder. The Test.class file is stored within the p2 sub-folder of p1.

B : The App class is accessible within the Test class without an import statement.

C : import p1.App; is used to access the App class within the Test class.

D : It is optional to have the package statement as the first line of class definitions

Answer: C

Question 5

Which statement best describes encapsulation?

Options :

A : Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects

B : Encapsulation ensures that classes can be designed so that their methods are inheritable.

C : Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.

D : Encapsulation ensures that classes can be designed so that if a method has an argument MyType x, any subclass of MyType can be passed to that method

Answer: A

Confidently Practice Online with Free 1Z0-808 Exam Cram

Buying Options: