200-550 Online Practice Questions and Answers

What is the output of the following code?

class Base {

protected static function whoami() {

echo "Base ";

}

public static function whoareyou() {

static::whoami();

}

}

class A extends Base {

public static function test() {

Base::whoareyou();

self::whoareyou();

parent::whoareyou();

A. :whoareyou();static::whoareyou();}public static function whoami() {echo "A ";}}class B extends A {public static function whoami() {echo "B ";}}

B. :test();

C. B B B B B

D. Base A Base A B

E. Base B B A B

F. Base B A A B

What information can be used to reliably determine the type of an uploaded file?

A. MIME type

B. File name extension

C. Contents of the file

Which interfaces could class C implement in order to allow each statement in the following code to work?

(Choose 2)

$obj = new C();

foreach ($obj as $x => $y) {

echo $x, $y;

}

A. Iterator

B. ArrayAccess

C. IteratorAggregate

D. ArrayObject

What is the output of the following code?

$a = array('a', 'b'=>'c');

echo property_exists((object) $a, 'a')?'true':'false'; echo '-';

echo property_exists((object) $a, 'b')?'true':'false';

A. false-false

B. false-true

C. true-false

D. true-true

Given a php.ini setting of

default_charset = utf-8

what will the following code print in the browser?

header('Content-Type: text/html; charset=iso-8859-1');

echo 'and#9986;and#10004;and#10013;';

A. Three Unicode characters, or unreadable text, depending on the browser

B. and#9986;and#10004;and#10013;

C. A blank line due to charset mismatch

How can you determine whether a PHP script has already sent cookies to the client?

A. Use $_COOKIE

B. Use the getcookie() function

C. Use the headers_sent() function

D. Use JavaScript to send a second HTTP request

How many times will the function counter() be executed in the following code?

function counter($start, and$stop)

{

if ($stop > $start)

{

return;

}

counter($start--, ++$stop);

}

$start = 5;

$stop = 2;

counter($start, $stop);

A. 3

B. 4

C. 5

D. 6

Which of the following statements about Reflection is correct?

A. Reflection is an extension that can be disabled

B. Reflection is a new extension present only in PHP 5.3+

C. Reflection only allows to reflect on built-in classes

D. Built-in classes can be reflected on command line using php --rc

Which of the following rules must every correct XML document adhere to? (Choose 2) A. It has to be well-formed.

B. It has to be valid.

C. It has to be associated to a DTD.

D. It may only contain UTF-8 encoded characters.

Given the default PHP configuration, how can all of the parameters provided via GET be accessed in a form of a string?

A. $_GET['ALL']

B. $_SERVER['QUERY']

C. $_SERVER['QUERY_STRING']

D. $_ENV['QUERY']

E. $QUERY_STRING