PHP OOP Practice Quiz

Which of the following statements accurately describes the concept of inheritance in pHP object-oriented programming (OOP)?

• Inheritance allows a child class to inherit properties and methods from multiple parent classes simultaneously.

• Inheritance is a mechanism by which a class can inherit properties and methods from one parent class only.

• Inheritance is primarily used to restrict access to certain properties and methods within a class hierarchy.

• Inheritance facilitates the creation of entirely new properties and methods in child classes, distinct from those in parent classes.

Which function activates the circular reference collector?

• Gc_rc()

• Gc_enable()

• Crc_enable()

• Gc_activate()

• Crc_activate()

Does anonymous functions allow creation of functions without specifying their name?

• Yes

• No

• There is nothing like 'anonymouss functions'

Mysql_connect() takes parameters:

• (string, string, string, bool, int)

• (string, string)

• (string, string, string, bool)

• (string, string, string, int, bool)

• (string, string, string, bool, bool)

What does pHP stand for?

• PHP: Hypertext Processor

• Private Home Page

• Personal Home Page

• Personal Hypertext Processor

• PHP: Personal Hypertext Processor

Is it possible to run several versions of pHP at the same time?

• Yes

• No

• Yes, but only commercial editions of PHP

pHP scripts are surrounded by delimiters, which?

• ...

• or

All variables in pHP are prefixed with special symbol, which?

• @

• #

• $

• \

• %

How do You get information from a form that is submitted using the "get" method?

• Request.QueryString;

• Request.Form;

• Get_request();

• $_GET[];

• Request(GET);

In pHP You can use both single quotes (' ') and double quotes (" ") for strings:

• True

• False

• None from above

Include files must have file extension *.inc

• True

• False

What is the correct way to connect to MySQL database?

• Connect_mysql("localhost");

• Mysql_open("localhost");

• Dbopen("localhost");

• Mysql_connect("localhost");

• Depends on MySQL server version

What is the correct way to add 1 to the variable?

• $variable =+ 1;

• Variable =+1;

• Variable++;

• $variable++;

• Variable +=1;

What is the correct way to add comments to pHP code?

• */.../*

• *\...\*

• #...

• …

Which one of theese variables has illegal name?

• $myVar

• $my_Var

• $my-Var

• All of them

• None of them

Can pHP be executed in Command line?

• Yes

• No

• Only on linux

• Only on Windows

What Value $bodytag contains?

• Body text='%black%'

• Body text='black'

• Body text="black"

• None

$data = "foo:*:1023:1000::/home/foo:/bin/sh"; list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data); echo $user; echo $pass; ?> What set of value it will give?

• Foo:*1023

• Foo*

• *foo

• Foo

• *

$fruits = array("lemon", "orange", "banana", "apple"); sort($fruits); foreach ($fruits as $key => $val) { echo "fruits[" . $key . "] = " . $val . "\n"; } ?> The above code will result in:

• Fruits[0] = lemon fruits[1] = orange fruits[2] = banana fruits[3] = apple

• Apple banana lemon orange

• Fruits[0] = apple fruits[1] = banana fruits[2] = lemon fruits[3] = orange

• Fruits[0] = apple fruits[1] = banana fruits[2] = orange fruits[3] = lemon

• None

$Link_ID = odbc_connect("DSN", "user", "pass"); $Return = odbc_autocommit($Link_ID, FALSE); ?> will result in:

• Set autocommit on

• Set autocommit off

• Error in code

• Nothing

What's correct result of below code? $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple"); asort($fruits); foreach ($fruits as $key => $val) { echo "$key = $val\n"; } ?>

• Apple banana lemon a = orange

• C = apple b = banana d = lemon a = orange

• A = apple b = banana c = lemon d = orange

• Apple banana lemon orange

• Apple banana lemon orange

If only one array is given in array_merge() as parameter and the array is numerically indexed, the keys get reindexed in a continuous way.

• The above sentense is true

• The above sentense is false

• Described situation will result in error

$array = array('first' => null, 'second' => 4); isset($array['first']); ?> Choose the correct answer.

• Isset returns true

• Isset returns false

• Error in code

$email = '[email protected]'; $domain = strstr($email, '@'); echo $domain; ?> Whats the result of above code?

• Name

• [email protected]

• @example

• @example.com

• Example.com

In pHP, which of the following statements about visibility and inheritance in OOP is true?

• A private method in a parent class can be accessed directly by its child class.

• A protected property in a parent class can be accessed directly by its child class.

• A public method in a parent class cannot be overridden by a child class.

• A static property cannot be inherited by a child class.

$i = 0; while ($i <= 0): echo $i; $i++; endwhile; ?> What value will it give?

• 12345

• 1

• 0

• Displays nothing

• Error in code

for ($i = 1; ; $i++) { if ($i > 10) { break; } echo $i; } ?> What result will it give?

• 12345678910

• 1234567891011

• None

$arr = array(1, 2, 3, 4); foreach ($arr as &$value) { $value = $value * 2; } echo $value; unset($value); ?> What is the result?

• NULL

• 0

• 8

• Error in code

Which function gets information about the last error that occurred?

• Getlasterror()

• Get_error()

• Get_last_error()

• Error_get_last()

Which function sets the error_reporting directive at runtime?

• Set_error()

• Error_reporting()

• Set_error_reporting()

• Set_reporting_errors()

Which function generates a user-level error/warning/notice message?

• Trigger_error()

• Error_log()

• Report_error()

• Error_report()

• Log_error()

When an object is cloned, pHP 5 will perform a shallow copy of all of the object's properties. Any properties that are references to other variables, will remain references.

• True

• False

$rest = substr("abcdef", -3, 1); ?> What dalue does $rest contain?

• E

• A

• F

• D

• C

$string = 'Hello World!'; if(stristr($string, 'earth') === FALSE) { echo '"earth" not found in string'; } ?> The above code:

• Outputs: Hello World!

• Outputs: "earth" not found in string

• No output

• Gives error in code

Which of the following keywords is used to declare a class in pHP?

• Class 

• Function 

• Object 

• New

True or False: In pHP, a class can have multiple constructors.

• True

• False

In pHP, the keyword used to ensure a method in a child class calls the method with the same name in the parent class is ______________.