Zend-Technologies 200-550 問題集

質問 1：
What is the output of the following code?
class Bar {
private $a = 'b';
public $c = 'd';
}
$x = (array) new Bar();
echo array_key_exists('a', $x) ? 'true' : 'false';
echo '-';
echo array_key_exists('c', $x) ? 'true' : 'false';
A. true-false
B. false-true
C. true-true
D. false-false
正解：B

質問 2：
What super-global should be used to access information about uploaded files via a POST request?
A. $_ENV
B. $_POST
C. $_GET
D. $_SERVER
E. $_FILES
正解：E

質問 3：
Which of the following is NOT true about PHP traits? (Choose 2)
A. Multiple traits can be used by a single class.
B. A trait can implement an interface.
C. Traits are able to be auto-loaded.
D. A trait can declare a private variable.
E. Traits automatically resolve conflicts based on definition order.
正解：B,E

質問 4：
Which php.ini setting is usually required to use an opcode cache?
A. extension
B. optimizer
C. zend_extension
D. dl
正解：C

質問 5：
CORRECT TEXT
Which PHP function sets a cookie whose value does not get URL encoded when sending it to the browser?
正解：
setrawcookie, setrawcookie()

質問 6：
What will an opcode cache ALWAYS automatically improve?
A. Running time of a loop in a PHP script
B. Memory footprint of a PHP script
C. Execution speed of a PHP script
D. Efficiency of HTML markup generated by a PHP script
E. None of the above
正解：E

質問 7：
What is the output of the following code?
function ratio ($x1 = 10, $x2) {
if (isset ($x2)) {
return $x2 / $x1;
}
}
echo ratio (0);
A. A warning, because $x2 is not set
B. 0
C. A warning, because $x1 is not set
D. Nothing
E. An integer overflow error
F. A floating-point overflow error
正解：A