Tag: php

Question 1

What PHP stands for?

php

Hypertext Preprocessor
Pre Hypertext Processor
Pre Hyper Processor
Pre Hypertext Process

Answer

Correct Option: A

Question 2

How does the identity operator === compare two values?

php

It converts them to a common compatible data type and then compares the resulting values
It returns True only if they are both of the same type and value
If the two values are strings, it performs a lexical comparison
It bases its comparison on the C strcmp function exclusively

Answer

Correct Option: B

Question 3

Under what circumstance is it impossible to assign a default value to a parameter while declaring a function?

php

When the parameter is Boolean
When the function is being declared as a member of a class
When the parameter is being declared as passed by reference
When the function contains only one parameter

Answer

Correct Option: C

Question 4

Variables always start with a ........ in PHP

php

Pond-sign
Yen-sign
Dollar-sign
Euro-sign

Answer

Correct Option: C

Question 5

What is the value displayed when the following is executed? Assume that the code was executed using the following URL:

testscript.php?c=25

php

25
10
-5
0

Answer

Correct Option: C

Question 6

Choose the appropriate function declaration for the user-defined function is_leap(). Assume that, if not otherwise defined, the is_leap function uses the year 2000 as a default value:

{
$is_leap = (!($year %4) && (($year % 100) ||
!($year % 400)));
return $is_leap;
}
var_dump(is_leap(1987)); /* Displays false /
var_dump(is_leap()); / Displays true */

php

function is_leap($year = 2000)
function is_leap($year default 2000)
function is_leap($year)
is_leap($year default 2000)

Answer

Correct Option: A

Question 7

What is the best way to iterate through the $myarray array, assuming you want to modify the value of each element as you do?

$myarray = array ("My String","Another String","Hi, Mom!");

php

Using a for loop
Using a foreach loop
Using a while loop
Using a do..while loop

Answer

Correct Option: A

Question 8

Which language construct can best represent the following series of if conditionals?

if($a == 'a') {
  somefunction();
} else if ($a == 'b') {
  anotherfunction();
} else if ($a == 'c') {
  dosomething();
} else {
  donothing();
}

php

A switch statement without a default case
A recursive function call
A switch statement using a default case
A while statement

Answer

Correct Option: C

Question 9

What will the following script output?

$array = '0123456789ABCDEFG';
  $s = '';
  for ($i = 1; $i < 50; $i++) {
     $s .= $array[rand(0,strlen ($array) - 1)];
  }
echo $s;

php

A string of 50 random characters
A string of 49 copies of the same character, because the random number generator
A string of 49 random characters
has not been initialized

Answer

Correct Option: C

Question 10

What is the output of the following script?

$a = 10;
$b = 20;
$c = 4;
$d = 8;
$e = 1.0;
$f = $c + $d * 2;
$g = $f % 20;
$h = $b - $a + $c + 2;
$i = $h << $c;
$j = $i * $e;
print $j;

php

128
42
256
342

AI Explanation

AI 1

To find the output of the given script, let's go through each line of code:

$a = 10;
$b = 20;
$c = 4;
$d = 8;
$e = 1.0;

Here, we are assigning values to the variables $a, $b, $c, $d, and $e.

$f = $c + $d * 2;

In this line, $c is added to the result of multiplying $d by 2. $f is assigned the value of 4 + (8 * 2) = 4 + 16 = 20.

$g = $f % 20;

In this line, $g is assigned the remainder when $f is divided by 20. Since $f is equal to 20, the remainder is 0. Therefore, $g is assigned the value of 0.

$h = $b - $a + $c + 2;

In this line, $b is subtracted by $a, and $c is added to the result. Then, 2 is added to the result. $h is assigned the value of 20 - 10 + 4 + 2 = 16.

$i = $h &lt;&lt; $c;

In this line, $h is shifted left by $c bits. Since $c is equal to 4, $h is shifted left by 4 positions. Shifting a binary number left by n positions is equivalent to multiplying it by 2^n. So, $i is assigned the value of $h multiplied by 2^4. $i is assigned the value of 16 * 16 = 256.

$j = $i * $e;

In this line, $i is multiplied by $e. Since $i is equal to 256 and $e is equal to 1.0, $j is assigned the value of 256 * 1.0 = 256.

print $j;

Finally, the value of $j, which is 256, is printed as the output.

Therefore, the correct answer is C) 256.

Answer

Correct Option: C

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