Oracle 1Z0-803 問題集

質問 1：
Given:

What is the result?
A. There is no result because this is not correct way to determine the hash code
B. Compilation fails
C. Hash is: 111111, 44444444, 999999999
D. An exception is thrown at runtime
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 2：
Given the fragments:

Which line causes a compilation error?
A. Line n3
B. Line n4
C. Line n2
D. Line n1
正解：D

質問 3：
Given: What is the result?

A. 10 20 30 40
B. Compilation fails
C. 0 0 30 40
D. An exception is thrown at runtime
正解：C

質問 4：
Given the code fragment:
float x = 22.00f % 3.00f;
int y = 22 % 3;
System.out.print(x + ", "+ y);
What is the result?
A. 1.0f, 1
B. Compilation fails
C. 7.33, 7
D. 1.0, 1
E. An exception is thrown at runtime
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Given the code fragment: What is the result?

A. Found Red Found Blue Found White
B. Found Red
C. Found Red Found Blue
D. Found Red Found Blue Found White Found Default
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Which two are valid array declaration?
A. Float[2] array;
B. Boolean array[3];
C. int[] array;
D. Object array[];
正解：C,D

質問 7：
Given:
public class Test {
public static void main(String[] args) {
try {
String[] arr =new String[4];
arr[1] = "Unix";
arr[2] = "Linux";
arr[3] = "Solarios";
for (String var : arr) {
System.out.print(var + " ");
}
} catch(Exception e) {
System.out.print (e.getClass());
}
}
}
What is the result?
A. Unix Linux Solaris
B. Null Unix Linux Solaris
C. Class java.lang.Exception
D. Class java.lang.NullPointerException
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 8：
Given:

Which statement, when inserted into line 5, is valid change?
A. asc = sc.clone ()
B. asc = sc;
C. asc = (object) sc;
D. sc = asc;
正解：D
解説: (Topexam メンバーにのみ表示されます)