1.What is the output of the code below ?

    
    $now  = new DateTime();
    $now2 = new DateTime();

    $ago  = new DateInterval('P4Y10M3W');
    $ago2 = new DateInterval('P4Y10M2W7D');

    $then  = $now->sub($ago);
    $date1 = $then->format('Y-m-d');

    $then2 = $now2->sub($ago2);
    $date2 = $then2->format('Y-m-d');

    var_dump ($date1 === $date2);
    

bool(false) - because the '2W' part in $ago2 will get overwritten by the '7D' part and therefor the second date interval will be 2 Weeks shorter than the first interval.

bool(true) - because the two interval definitions are equivalent.

bool(false) and the script will throw a notice because the date/time interval notation in the $ago2 variable is wrong.

2.How does Opcode Cache improve performance in PHP 5.5+ ?

Opcode Cache stores objects in memory so that they can be accessed directly by other processes.

Opcode Cache stores database query results thus eliminating the need of executing those queries again

OPcache stores precompiled script bytecode in memory, thus removing the need to load and parse scripts on each request.

3.What is the output of the following PHP script?

                    <?php 
                        $a = 1;
                        $b = 2.5;
                        $c = 0xFF;
                        $d = $b + $c;
                        $e = $d * $b;
                        $f = ($d + $e) % $a;
                        print ($f + $e);
                  

643.75

432

643

257

432.75

4.What is the output of the following code block? $a = "The quick brown fox jumped over the lazy dog."; $b = array_map("strtoupper", explode(" ", $a)); foreach ($b as $value) { print "$value "; }

THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG.

A PHP Error

Array Array Array Array Array Array Array Array Array

5.Which key will not be displayed from the following code block? $array = array('a' => 'John', 'b' => 'Coggeshall', 'c' => array('d' => 'John', 'e' => 'Smith')); function display($item, $key) { print "$key => $item\n"; } array_walk_recursive($array, "display");

d

c

b

a

They all will be displayed

6.Which of the following functions are used with the internal array pointer to accomplish an action?

key

forward

prev

current

next

7.The ____ construct is particularly useful to assign your own variable names to values within an array.

array_get_variables

current

each

import_variables

list

8.What is the output of the following PHP code? define("FOO", 10); $array = [10 => FOO,"FOO" => 20]; print $array[$array[FOO]] * $array["FOO"];

FOO

100

200

20

10

9.What is the output of the following? $a = 010; $b = 0xA; $c = 2; print $a + $b + $c;

20

22

$a is an invalid value

2

10.Given a PHP value, which sample shows how to convert the value to JSON?

$string = json_encode($value);

$string = Json::encode($value);

$json = new Json($value); $string = $json->__toString();

$value = (object) $value; $string = $value->__toJson();

11.Consider the following table data and PHP code. What is the outcome? Table data (table name "users" with primary key "id"): id name email ------- ----------- ------------------- 1 anna [email protected] 2 betty [email protected] 3 clara [email protected] 5 sue [email protected] PHP code (assume the PDO connection is correctly established): $dsn = 'mysql:host=localhost;dbname=exam'; $user = 'username'; $pass = '********'; $pdo = new PDO($dsn, $user, $pass); $cmd = "SELECT * FROM users WHERE id = :id"; $stmt = $pdo->prepare($cmd); $id = 3; $stmt->bindParam('id', $id); $stmt->execute(); $stmt->bindColumn(3, $result); $row = $stmt->fetch(PDO::FETCH_BOUND);

The database will return no rows.

The value of $row will be an array.

The value of $result will be empty.

The value of $result will be '[email protected]'.

12.What is the best way to ensure that a user-defined function is always passed an object as its single parameter?

function myfunction(stdClass $a)

function myfunction($a = stdClass)

Use is_object() within the function

There is no way to ensure the parameter will be an object.

function myfunction(Object $a)

13.What does the following function do, when passed two integer values for $p and $q? function magic($p, $q) { return ($q == 0) ? $p: magic($q, $p % $q); }

Loops infinitely.

Switches the values of $p and $q.

Determines if they are both even or odd?

Determines the greatest common divisor between them.

Calculates the modulus between the two.

14.What is the difference between the ``include`` and ``require`` language constructs?

Require constructs can't be used with URL filenames

Include constructs cause a fatal error if the file doesn't exist

There is no difference other than the name

Include constructs are processed at run time; require constructs are processed at compile time

Require constructs cause a fatal error if the file can't be read

15.What would you replace ??????? with, below, to make the string Hello, World! be displayed? function myfunction() { /* ??????? */ print $string; } myfunction("Hello, World!");

There is no way to do this.

$string = $argv[1];

$string = $_ARGV[0];

list($string) = func_get_args();

$string = get_function_args();

16.How does one access standard input/output and error streams in PHP 5?

STDIN, STDOUT and STDERR constants

Use stdin(), stdout() and stderr() functions

PHP::STDIN, PHP::STDOUT and PHP::STDERR class constants

Use PHP::stdin(), PHP::stdout() and PHP::stderr() class functions

17.In PHP 5 you can use the ______ operator to ensure that an object is of a particular type. You can also use _______ in the function declaration.

instanceof, is_a

instanceof, type-hinting

type, instanceof

===, type-hinting

===, is_a

18.Type-hinting and the instanceof keyword can be used to check what types of things about variables?

If a particular child class extends from it

If they are an instance of a particular interface

If they are an abstract class

If they have a particular parent class

If they are an instance of a particular class

19.The _______ method will be called automatically when an object is represented as a string.

getString()

__get()

__value()

__toString()

__getString()

20.Which php.ini directive should be disabled to prevent the execution of a remote PHP script via an include or require construct?

You cannot disable remote PHP script execution

curl.enabled

allow_remote_url

allow_url_fopen

allow_require

21.For an arbitrary string $mystring, which of the following checks will correctly determine if the string PHP exists within it?

if(strpos($mystring, "PHP") !== false)

if(!strpos($mystring, "PHP"))

if(strpos($mystring, "PHP") === true

if(strloc($mystring, "PHP") == true

if(strloc($mystring, "PHP") === false)

22.Which of the following are not valid ways to embed a variable into a string?

$a = "Value: $value->getValue()";

$a = "Value: {$value}";

$a = 'Value: $value';

$a = "Value: $value";

$a = "Value: {$value['val']}";

23.A fingerprint of a string can be determined using which of the following?

md5()

hash()

fingerprint()

None of the above

24.Which function is best suited for removing markup tags from a string?

strip_markup

strip_tags

str_replace

preg_replace

preg_strip

25.Consider the following script: $oranges = 10; $apples = 5; $string = "I have %d apples and %d oranges"; ??????? What could be placed in place of ?????? to output the string: "I have 5 apples and 10 oranges"

str_format($string, $apples, $oranges);

print($string, $apples, $oranges);

printf($string, $apples, $oranges);

print sprintf($apples, $oranges);

sprintf($string, $oranges, $apples);

26.To destroy a PHP session completely, one must which of the following?

Regenerate the session ID using session_regenerate_id()

If cookies are used, destroy it

Use session_demolish() to completely destroy the session

Change the session name using session_name()

Destroy the session data using session_destroy()

27.Consider the following HTML fragment: <select name="???????" multiple> <option value="1">Item #1</option> <!-- ... more options ... --> </select> Which of the following name attributes should be used to capture all of the data from the user in PHP?

myselectbox=array()

myselectbox[]

myselectbox['multiple']

myselectbox{'multiple'}

myselectbox

28.During an HTTP authentication, how does one determine the username and password provided by the browser?

Parse the HTTP headers manually using http_get_headers()

Use the get_http_username() and get_http_password() functions

Use the $_SERVER['HTTP_USER'] and $_SERVER['HTTP_PASSWORD'] variables

Use the $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW'] variables

Parse the $_SERVER['REQUEST_URI'] variable

29.One can ensure that headers can always be sent from a PHP script by doing what?

Enable header buffering in PHP 5

Set the header.force INI directive to true

Enable output buffering in PHP 5

There is no way to ensure that headers can always be set, they must always be checked

None of the above

30.Which of the following is not a valid fopen() access mode:

b

x

a

w

r+