200-710 試験問題を無料オンラインアクセス

What is the output of the following code?
class Foo Implements Array Access {
function offsetExists($k) { return true;}
function offsetGet($k) {return 'a';}
function offsetSet($k, $v) {}
function offsetUnset($k) {}
}
$ x = new Foo();
echo array_key_exists('foo', $x)?'true':'false';

• A.true
• B.false

Which PHP function is used to validate whether the contents of $_FILES['name']['tmp_name'] have really
been uploaded via HTIP, and also save the contents into another folder?

Which technique should be used to speed up joins without changing their results?

• A.Add a WHERE clause
• B.Add a LIMIT clause
• C.Add indices on joined columns
• D.Use an inner join

What is the output of the following code?
for ($i = 0; $i < 1.02; $i += 0.17) {
$ a[$i] = $i;
}
echo count($a);

• A.0
• B.1
• C.6
• D.7
• E.2

PHP's array functions such as array_values() can be used on an object if the object...

• A.implements Traversable
• B.is an instance of ArrayObject
• C.None of the above
• D.implements Array Access