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Operators And Expressions MCQ question and answer with solution | PHP Programming

Learn Operators And Expressions MCQ Questions and answers with easy and logical explanations. Operators And Expressions MCQ in PHP programming provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-5 section-1

Each section contains 100 MCQs on Operators and Expressions in php .
41
What will be the output of the following PHP code ? 
<?php
class myObject { }
define('myObject::CONSTANT', 'test');
echo myObject::CONSTANT; 
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
Class constants cannot be defined outside class.
42
What will be the output of the following PHP code ? 
<?php
$x = 5;
$y = 10;
$z = "$x + $y";
echo "$z";
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
Variable z will store 10 + 5 because 10 + 5 is given in double-quotes.
43
What will be the output of the following PHP code ? 
<?php
$x = 4;
$y = 3;
$z = 1;
echo "$x = $x + $y + $z";
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Again since the variables are inside double quotes we get this result.
44
What will be the output of the following PHP code ? 
<?php
$x = 4;
$y = 3
$z = 1;
$z = $z + $x + $y;
echo "$z";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
Normal addition of variables x, y and z occurs and result of 8 will be displayed.
45
What will be the output of the following PHP code ? 
<?php
$x = 3.3;
$y = 2;
echo $x % $y;
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
% is the modulo operator. Unlike in C we can use it get reminder or floating point numbers in PHP.
46
What will be the output of the following PHP code ? 
<?php
$x = 10;
$y = 4;
$z = 3;
echo $x % $y % $z;
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
The expression is considered as ($x%$y)%z in this case (10%4)%3 which is 2.
47
What will be the output of the following PHP code ? 
<?php
$x = 10;
$y = 4;
$z = 3;
echo ($x % ($y) + $z);
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
The inner most bracket is evaluated first, since it covers only variable y it is as good as not using brackets.
48
What will be the output of the following PHP code ? 
<?php
$x = 30;
$y = 20;
$z = 10;
echo $x + $y - $z / ($z - $y);
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
First ($z – $y) is evalulated then -$z/($z – $y) is evaluated this results in 1 which is added to $x + $y therefore we get 51.
49
What will be the output of the following PHP code ? 
<?php
$x = 4;
$y = -3;
$z = 11;
echo 4 + $y * $z / $x;
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
First the * is evaluated then / followed by + therefore we can rewrite this expression as 4 +((- 3 * 11) / 4) which results in -4.25.
50
What will be the output of the following PHP code ? 
<?php
$x = 3.5;
$y = 2;
$z = 2;
echo $x / $y / $z;
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
First $x / $y is evaluated then this is divided by $z therefore we get 0.875.