1.What happens when you run the following MySQL Query ?

  
  CREATE TABLE PRIMARY (ID int);
  

Syntax Error - PRIMARY is reserved in MySQL and should be quoted to be used as a table name

Syntax Error - PRIMARY is reserved in MySQL and can not be used as a table name

A table called PRIMARY containing a column called ID is created

2.What is the output of the following script ?

  <?php
  function generate() {
      for ($i = 1; $i <= 3; $i++) 
          yield $i;
  }
  $generator = generate();
  if(is_array($generator))
    echo "Is Array";
  elseif(is_object($generator))
    echo "Is Object";
  else
    echo "Is none of the above";
  ?>

Is Array

Is Object

Is none of the above

3.What happens when the code below is executed ?

  <?php
    class foo
    {
      private $variable;

      function __construct()
      {
        $this->variable = 1;
      }

      function __get($name)
      {
        return $this->$name;
      }
    }
    $a = new foo;
    echo $a->variable;
  ?>

The script outputs 1

Fatal error: Cannot access private property foo::$variable

The script outputs 0

4.Considering the code below ...

  
    <?php 
        
    class AppException extends Exception
    {
      function __toString()
      {
        return "Your code has just thrown an exception: {$this->message}\n";
      }
    }

    class Students
    {
      public $first_name;
      public $last_name;

      public function __construct($first_name, $last_name)
      {
        if(empty($first_name))
        {
          throw new AppException('First Name is required', 1);
        }

        if(empty($last_name))
        {
          throw new AppException('Last Name is required', 2);
        }
      }
    }

    try {
     new Students('', ''); 
    } catch (Exception $e) {
      echo $e;
    }
  

... which of these statements are correct ?

The catch (Exception $e) statement is wrong because it accepts an instance of the Exception class as the parameter. It should use an instance of the AppException class instead.

The __toString() method can't be overwritten in a child class because the methods in the Exception class are all final but for the constructor

The magic __toString() method will be invoked automatically when the code enters the catch() statement and the custom exception message will be printed

5.Assuming that the code below is in a file named "test.php" and that PHP has full rights over the file, what happens if the file is executed from the command line without any arguments ?

  exec("rm -f " . dirname(__FILE__) . "/" .  $argv[0]);

The script exits without doing anything

The file test.php is deleted

A notice is thrown because $argv[0] is not defined and the script fails.

6.Considering the following code which of the statements below is true ?

    class entity {
        public $name;
    }
    $human = new entity();
    $dog = new entity();
    $human->name = 0;
    $dog->name = "";

($human == $dog)

($human === $dog)

($human->name == $dog->name)

7.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.

8.What happens if you execute the code below ?

<?php
    class someclass
    {
        public $someprop;
        
        function __construct()
        {
            $this->someprop = 1;
        }
    }

    function somefunc(&$instance) {
        unset($instance);
    }

    $instance = new someclass;
    somefunc($instance);
    var_dump($instance);

NULL

object(someclass)#1 (1) { ["someprop"]=> int(1) }

Warning (Only variables can be passed by refence) NULL

9.How do you access standard I/O and error streams ?

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

STDIN, STDOUT and STDERR constants

10.What is the output of this code snippet? $a = array(0.001 => 'b', .1 => 'c'); var_dump($a);

An empty array

0.001 => 'b', .1 => c

0 => 'c'

'0.001' => 'b', '0.1' => c'

A Syntax Error

11.What is the output of the following code block? $array = array(1 => 0, 2, 3, 4); array_splice($array, 3, count($array), array_merge(array('x'), array_slice($array, 3))); var_dump($array);

1 => 1, 2 => 2, 3 => x, 4 => 4

0 => 1, 2 => 2, 3 => 3, 4 => 4, x => 3

0 => 0, 1 => 2, 2 => 3, 3 => x, 4 => 4

0 => x, 1 => 0, 2 => 1, 3 => 2, 4 => 3

1 => 1, 3 => x, 2 => 2, 4 => 4

12.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

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

array_get_variables

current

each

import_variables

list

14.Which of the following are valid PHP variables?

@$foo

&$variable

${0x0}

$0x0

15.What is the output of the following PHP script? $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

16.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

17.Which one of the following XML declarations is NOT valid?

<?xml version="1.0" ?>

<?xml version="1.1" encoding="UTF-8" ?>

<?xml standalone="no" ?>

<?xml standalone="1" ?>

18.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

19.How to access standard error stream in PHP ?

$stderr = STDERR;

$stderr = fopen("php://stderr", "w");

$stderr = stderr("w")

$stderr = fwrite("php://stderr");

20.When checking to see if two variables contain the same instance of an object, which of the following comparisons should be used?

if($obj1->equals($obj2) && ($obj1 instanceof $obj2))

if($obj1->equals($obj2))

if($obj1 instanceof $obj2)

if($obj1 === $obj2)

21.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

22.What is the output of the following script? class ClassOne { protected $a = 10; public function changeValue($b) { $this->a = $b; } } class ClassTwo extends ClassOne { protected $b = 10; public function changeValue($b) { $this->b = 10; parent::changeValue($this->a + $this->b); } public function displayValues() { print "a: {$this->a}, b: {$this->b}\n"; } } $obj = new ClassTwo(); $obj->changeValue(20); $obj->changeValue(10); $obj->displayValues();

a: 30, b: 30

a: 30, b: 20

a: 30, b: 10

a: 20, b: 20

a: 10, b: 10

23.To ensure that a given object has a particular set of methods, you must provide a method list in the form of an ________ and then attach it as part of your class using the ________ keyword.

array, interface

interface, implements

interface, extends

instance, implements

access-list, instance

24. Which of the following list of potential data sources should be considered trusted?

$_ENV

$_GET

$__COOKIE

$_SERVER

None of the above

25.What is the best measure one can take to prevent a cross-site request forgery?

Disallow requests from outside hosts

Add a secret token to all form submissions

Turn off allow_url_fopen in php.ini

Filter all output

Filter all input

26.When implementing a permissions system for your Web site, what should always be done with regards to the session?

You should not implement permission systems using sessions

Sessions should be cleared of all data and re-populated

The session key should be regenerated

The session should be destroyed

None of the above

27.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);

28.If regular expressions must be used, in general which type of regular expression functions available to PHP is preferred for performance reasons?

strtok() using regular expressions

preg_* regular expression functions

parse_str() using regular expressions

strregex* regular expression functions

ereg* regular expression functions

29.If you would like to change the session ID generation function, which of the following is the best approach for PHP 5?

Set the session.hash_function INI configuration directive

Use the session_set_id_generator() function

Set the session id by force using the session_id() function

Use the session_regenerate_id() function

Implement a custom session handler

30.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