最新の1z1-815問題集で試験を準備する

Oracle 1z1-815 試験概要:

Oracle 1z1-815 試験シラバストピック:

Oracle Java SE 11 Programmer I 認定 1z1-815 試験問題：

1. Given the code fragment:

What is the output?

A) [-3, -2, -1]
B) [-1, -2, -3]
C) A runtime exception is thrown.
D) The compilation fails.

2. Given:

It is required that if p instanceof Pair then p.isValid() returns true.
Which is the smallest set of visibility changes to insure this requirement is met?

A) setLeft and setRight must be protected.
B) isValid must be public.
C) left, right, setLeft, and setRight must be private.
D) left and right must be private.

3. Given:

What is the output?

A) 100
B) 200
C) 300
D) Exception

4. Given:

What is the result?

A) java.lang.ArrayIndexOutOfBoundsException thrown
B) [0,0] = Red
[1,0] = Black
[2,0] = Blue
C) [0,0] = Red
[0,1] = White
[1,0] = Black
[2,0] = Blue
[2,1] = Yellow
[2,2] = Green
[2,3] = Violet
D) [0,0] = Red
[0,1] = White
[1,0] = Black
[1,1] = Blue
[2,0] = Yellow
[2,1] = Green
[3,0] = Violet

5. Given:
public class SampleClass {
public static void main(String[] args) {
AnotherSampleClass asc = new AnotherSampleClass(); SampleClass sc = new SampleClass(); sc = asc; System.out.println("sc: " + sc.getClass()); System.out.println("asc: " + asc.getClass());
}}
class AnotherSampleClass extends SampleClass {
}
What is the result?

A) sc: class SampleClass
asc: class AnotherSampleClass
B) sc: class Object
asc: class AnotherSampleClass
C) sc: class AnotherSampleClass
asc: class AnotherSampleClass
D) sc: class AnotherSampleClass
asc: class SampleClass

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