Oracle 1z0-808 問題集

質問 1：
Given:

What is the result?
A. C B A
B. C
C. A B C
D. Compilation fails at line n1 and line n2
正解：C

質問 2：
Given the code fragment:

What is the result?
A. true
true
B. 28false29
true
C. 285 < 429
true
D. compilation fails
正解：A

質問 3：
Given the code fragment:

What is the result?
A. HiHowAreYou removed
B. The program compiles, but it prints nothing.
C. An UnsupportedOperationException is thrown at runtime.
D. Compilation fails.
正解：A

質問 4：
Given the code fragment:

What is the result?
A. 0
B. 3
C. Compilation fails.
D. -1
正解：D

質問 5：
Consider:
Integer number = Integer.valueOff 808.1");
Which is true about the above statement?
A. It will not compile.
B. The value of the variable number will be 0.
C. The value of the variable number will be 808
D. A NumberFormatException will be throw.
E. The value of the variable number will be 808.1
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Which of the following exception will be thrown due to the statement given here? int array[] = new int[-2];
A. ArrayIndexOutOfBoundsException
B. IndexOutOfBoundsException
C. NegativeArraySizeException
D. NullPointerException
E. This statement does not cause any exception.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Given:
Class A { }
Class B { }
Interface X { }
Interface Y { }
Which two definitions of class C are valid?
A. Class C extends B implements X, Y { }
B. Class C implements Y extends B { }
C. Class C implements X, Y extends B { }
D. Class C extends A implements X { }
E. Class C extends A, B { }
正解：A,D
解説: (Topexam メンバーにのみ表示されます)

質問 8：
Given the code fragment:

Which modification enables the code to print 54321?
A. Replace line 12 With return (x > 0) ? false: true;
B. Replace line 6 with System, out. print (--x) ;
C. Replace line 6 with --x; and, at line 7, insert system, out. print (x);
D. At line 7, insert x --;
正解：D

質問 9：
Given the following class:

And given the following main method, located in another class:

Which three lines, when inserted independently at line n1, cause the program to print a o balance?
A. acct.changeAmount(-acct.getAmount());
B. amount = 0;
C. acct.changeAmount(0);
D. acct. getAmount () = 0;
E. acct.changeAmount(-acct.amount);
F. acct.amount = 0;
G. this.amount = 0;
H. acct (0) ;
正解：A,E,F
解説: (Topexam メンバーにのみ表示されます)