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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-3 section-1

Each section contains 100 MCQs on Operators and Expressions in php .
21
What will be the output of the following PHP code ? 
<?php
$one = "Hello";
$two = "World";
echo $one, $two;
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
Echo can print two variables which are seperated by a comma.
22
What will be the output of the following PHP code ? 

<?php
$one = "Hello";
$two = "World";
echo "$one$two";
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Even though both the variables are inside the double-quotes, the value of the variable is substituted and then printed to the screen.
23
What will be the output of the following PHP code ? 

<?php
$one = "Hello";
$two = "World";
echo "$one"+"$two";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
In the given PHP code, the concatenation operator (.) should be used instead of the addition operator (+) to concatenate strings. When using the addition operator with strings, PHP will attempt to convert the strings to numbers for addition. If a string cannot be converted to a number, it will be treated as 0.

So, in this code, "$one" and "$two" are treated as numeric strings, which will be converted to 0 when converted to numbers. Therefore, the output of the expression "$one" + "$two" will be 0.

Option A: HelloWorld is incorrect because the correct output is 0, not the concatenation of the two strings.
Option B: Hello+World is incorrect because the correct output is 0, not the two strings separated by a plus sign.
Option D: Error is incorrect because there is no syntax error in the code, but the output is 0
24
What will be the output of the following PHP code ? 
<?php
echo "This is India";
?>
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
25
What will be the output of the following PHP code ? 
<?php
$cars = array("Volvo", "BMW", "Toyota");
echo "My car is a {$cars[0]}";
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
In the echo statement the {$cars[0]} is replaced by the 1st element in cars that is Volvo.
26
What will be the output of the following PHP code ? 
<?php
print "echo hello world";
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
The print statement will print what ever is present inside the double-quotes.
27
What will be the output of the following PHP code ? 
<?php
$one = 1;
print($one);
print $one;
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
Print can be used with or without parantheses.
28
What will be the output of the following PHP code ? 
<?php
$cars = array("Volvo", "BMW", "Toyota");
print $cars[2];
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
Print statement can be used to output a specific array member.
29
What will be the output of the following PHP code ? 
<?php
$one = "one";
$two = "two";
print($one$two);
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
The above syntax will produce an error, unlike the echo statement.
30
What will be the output of the following PHP code ? 
<?php
$one = "one";
$two = "two";
print($one,$two);
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
The above syntax will produce an error, unlike the echo statement.