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最新的 Java and Middleware 1z0-808 免費考試真題 (Q227-Q232):

問題 #227
Given:

Which two actions, used independently, will permit this class to compile?

  • A. Adding throws IOException to the doSoomething() method signature
  • B. Adding throws IOException to the main() method signature and changing the catch argument to IOException
  • C. Adding throws IOException to the main() method signature and to the dosomething() method
  • D. Adding throws IOException to the main() method signature
  • E. Adding throws IOException to the dosomething() method signature and changing the catch argument to IOException

答案:C,E

解題說明:
The IOException must be caught or be declared to be thrown.
We must add a throws exception to the doSomething () method signature (static void doSomething() throws IOException).
Then we can either add the same throws IOException to the main method (public static void main(String[] args) throws IOException), or change the catch statement in main to IOException.


問題 #228
Which two code fragments cause a compilation error? (Choose two.)

  • A. Float flt = 100.00;
  • B. float flt = (float) 1_11.00;
  • C. float flt = 100.00F;
  • D. double y1 = 203.22;float flt = y1;
  • E. int y2 = 100;float flt = (float) y2 ;

答案:C,D


問題 #229
Given:

What is the result?

  • A. Compilation fails
  • B. myStr: 7007, myNum: 9009
  • C. myStr: 9009, myNum: 9009
  • D. myStr: 7007, myNum: 7007

答案:B


問題 #230
Given:
public class Natural {
private int i;
void disp() {
while (i <= 5) {
for (int i = 1; i <= 5; ) {
System.out.print(i + " ");
i++;
}
i++;
}
}
public static void main (String args[]) {
new Natural().disp();
}
}

  • A. Prints 1 3 5 once
  • B. Prints 1 2 3 4 5 five times
  • C. Compilation fails
  • D. Prints 1 2 3 4 5 once
  • E. Prints 1 2 3 4 5 six times

答案:E


問題 #231
Which of the following can fill in the blank in this code to make it compile? (Select 2 options.)

  • A. On line 1, fill in throws
  • B. On line 2, fill in throws new
  • C. On line 2, fill in throws
  • D. On line 1, fill in throws new
  • E. On line 2, fill in throw new

答案:A,E

解題說明:
Option A and C are the correct answer.
In a method declaration, the keyword throws is used. So here at line 1 we have to use option A.
To actually throw an exception, the keyword throw is used and a new exception is created,
so at line 2 we have to use throw and new keywords, which is option C.
Finally it will look
like;
public void method() throws Exception {
throw new Exception0;
}
REFERENCE : httpsy/docs.oracle.com/javase/tutorial/essential/io/fileOps.html#exception
The correct answer is: On line 1, fill in throws. On line 2, fill in throw new


問題 #232
......

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