1Z0-808 (OCAJP 8) sample exam questions by Oracle

1. Given:

import java.util.ArrayList;
import java.util.List;
public class JavaSETest {
    public static void main(String[] args) {
        List<Integer> elements = new ArrayList<>();
        elements.add(10);
        int firstElmnt = elements.get(1);
        System.out.println(firstElmnt);
    }
}

What is the result?

A) null
B) 10
C) 0
D) An IndexOutOfBoundsException is thrown at runtime.

2. Given the code fragment:

// Line n1
switch (cardVal) {
    case 4: case 5: case 6:
    case 7: case 8:
        System.out.println("Hit");
        break;
    case 9: case 10: case 11:
        System.out.println("Double");
        break;
    case 15: case 16:
        System.out.println("Surrender");
        break;
    default:
        System.out.println("Stand");
}

Which two code fragments can be inserted at Line n1, independently, enable to print Stand?

A) int cardVal = 6;
B) int cardVal = 10;
C) int cardVal = 14;
D) int cardVal = 18;

3. Given:

abstract class Writer {
    public static void write() {
        System.out.println("Writing...");
    }
}
class Author extends Writer {
    public static void write() {
        System.out.println("Writing book");
    }
}
public class Programmer extends Writer {
    public static void write() {
        System.out.println("Writing code");
    }
    public static void main(String[] args) {
        Writer w = new Programmer();
        w.write();
    }
}

What is the result?

A) Writing…
B) Writing book
C) Writing code
D) Compilation fails.

4. Given:

class SuperClass {
    SuperClass(int x) {
        System.out.println("Super");
    }
}

public class SubClass extends SuperClass {
    SubClass() {
        // Line n1
        System.out.println("Sub 2");
    }
}

Which statement, when inserted at Line n1, enables the code to compile?

A) this(10);
B) super(10);
C) SuperClass(10);
D) super.SuperClass (10);

5. Given the code fragment:

public class TestClass {
    public static void main(String[] args) {
        List<String> items = new ArrayList<>();
        items.add("Pen");
        items.add("Pencil");
        items.add("Box");
        for (String i : items) {
            if (i.indexOf("P") == 0) {
                continue;
            } else {
                System.out.print(i + " ");
            }
        }
    }
}

What is the result?

A) Pen Pencil Box
B) Pen Pencil
C) Box
D) Compilation fails.

6. Which access modifier makes a member available only to classes within the same package or subclasses?

A) private
B) protected
C) public
D) package-private

7. Given the code fragment:

public class Test {
    public static void main(String[] args) {
        int x = 10;
        int y = 2;
        try {
            for (int z = 2; z >= 0; z--) {
                int ans = x / z;
                System.out.print(ans + " ");
            }
        } catch (Exception e1) {
            System.out.println("E1");
        } catch (ArithmeticException e1) {
            System.out.println("E2");
        }
    }
}

What is the result?

A) E1
B) E2
C) 5 10 E1
D) Compilation fails.

8. Given the code fragment:

StringBuilder s1 = new StringBuilder("Java");
String s2 = "Love";
s1.append(s2);
s1.substring(4);
int foundAt = s1.indexOf(s2);
System.out.println(foundAt);

What is the result?

A) -1
B) 3
C) 4
D) A StringIndexOutOfBoundsException is thrown at runtime.

Answers:

1) D
2) C and D
3) A
4) B
5) C
6) B
7) D
8) C

 
Source: Oracle, Exam 808: Java SE 8