Linkedin PHP Assessment Cevapları

Soru 1: What is the best way to explain what this script does?

if (!$_SESSION['myusername'])
{
    header('locaton: /login.php');
    exit;
}

This script times out the session for myusername.
This script is on a page that requires the user to be logged in. It checks to see if the user has a valid session.
Cookies are starting to be stored as a result of this script.
This script validates the username and password.

Soru 2: Which operator would you use to find the remainder after division?

Soru 3: What is the purpose of adding a lowercase “u” as a modifier after the final delimiter in a Perl-compatible regular expression?

It makes the dot metacharacter match anything, including newline characters.
It makes the pattern match uppercase letters.
It inverts the greediness of the quantifiers in the pattern so they are not greedy by default.
Both the pattern and subject string are treated as UTF-8.

Soru 4: What is the value of $total in this calculation?

$total = 2 + 5 * 20 - 6 / 3

44
138
126
100

Soru 5: Which value equates to true?

0
NULL
-1
”

Soru 6: What is a key difference between GET and POST?

GET is used with the HTTP protocol. POST is used with HTTPS.
GET displays the submitted data as part of the URL. During POST, this information is not shown, as it’s encoded in the request body.
GET is intended for changing the server state and it carries more data than POST.
GET is more secure than POST and should be used for sensitive information.

Soru 7: Which are valid PHP error handling keywords?

try, throw, catch, callable
try, throw, catch, finally
try, yield, catch, finally
yield, throw, catch, finally

Soru 8: The _ operator is useful for sorting operations. It compares two values and returns an integer less than, equal to, or greater than 0 depending on whether on whether the value on the ___is less than, equal to, or greater than the other.

greater-than; right
equality; right
spaceship; left
comparison; left

Soru 9: In the following script, which line(s) will cause an error(s)?

<?php
       $count = 0
       $_xval = 5
       $_yval = 1.0
       $some_string = "Hello there!";
       $some_string = "How are you?";
       $will i work = 6;
       $3blindmice = 3;
 ?>

Line 6 will cause an error because you can’t reassign a new value to a variable that has already been set.
Line 5 will cause an error because some_string should be someString.
Line 3 and 4 will cause an error because a variable cannot start with an underscore(_).
Line 7 and 8 will cause an error. Line 7 has whitespace in $will i work and should be $will_i_work. Line 8 cannot start with a number befcause it is a variable.

Soru 10: What does this script do?

$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);
if ($email === false) {
  $emailErr = "Please re-enter valid email";
}

It makes sure the email address is a good and functioning address
It makes an email safe to input into a database
It assigns an email to a variable and then removes all illegal characters from the $email variable
It verifies that an email address is well formed.

Soru 11: Which code snippet uses the correct syntax for creating an instance of the Pet class?

$dog = new Pet;
$horse = (new Pet);
$cat = new Pet();
All of these answers

Soru 12: Which is the correct format for adding a comment to a PHP script?

#This is a comment
/* This is a comment /*
// This is a comment
All of these answers

Soru 13: What is missing from this code, which is supposed to create a test cookies?

1 $string_name = " testcookie";
2 $string_value = "This is a test cookie";
3 $expiry_info = info()+259200;
4 $string_domain = "localhost.localdomain";

The $_REQUEST is missing.
The call to setcookie() is missing.
The $_COOKIES array is missing.
The cookie session is missing.

Soru 14: All variables in PHP start with which symbol?

Soru 15: In a conditional statement, you want to execute the code only if both value are true. Which comparison operator should you use?

Bir yanıt yazın Yanıtı iptal et