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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-2 section-1

Each section contains 100 MCQs on Operators and Expressions in php .
11
What will be the output of the following PHP code ? 
<?php
$color = "red";
$color = "green";
echo "$color";
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
The variable contains the last value which has been assigned.
12
What will be the output of the following PHP code ? 
<?php
$color1 = "red";
$color2 = "green";
echo "$color1" . "$color2";
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
The . operator is used to join to strings.
13
What will be the output of the following PHP code ? 
<?php
$color1 = "red";
$color2 = "green";
echo "$color1" + "$color2";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
+ operator does not join both the strings.
14
What will be the output of the following PHP code ? 
<?php
$color1 = "red";
$color2 = "red";
echo "$color1" + "$color2";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
+ does not return 1 if the variables are equal.
15
What will be the output of the following PHP code ? 
<?php
$color1 = "red";
$color2 = "1";
echo "$color1" + "$color2";
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
+ just returns the numeric value even though it is inside double quotes.
16
What will be the output of the following PHP code ? 
<?php
$color1 = "1";
$color2 = "1";
echo "$color1" + "$color2";
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
+ can be used to add to integer values which are enclosed by double-quotes.
17
What will be the output of the following PHP code ? 
<?php
$color1 = "red";
$color2 = "1";
$color3 = "grey"
echo "$color1" + "$color2" . "$color3";
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
+ gives the value 1 and . is used to give join 1 and grey.
18
What will be the output of the following PHP code ? 
<?php
echo "This", "was", "a", "bad", "idea";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
In an echo statement the comma operator is used to join strings.
19
What will be the output of the following PHP code ? 
<?php
echo "This"."was"."a"."bad"."idea";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
In an echo statement the dot operator is used to join strings.
20
What will be the output of the following PHP code ? 
<?php
echo "This","was"|"a","bad"."idea";
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
You can use only comma and dot operator to join starings, other characters do not have the same function.