PHP Operators Aptitude Questions and Answers

1. Arithmetic Operators
2. Logical Operators
3. Array Operators
4. String Operators

Options:

1. A and B
2. C and D
3. A, B, and C
4. A, B, C, and D

<?php
$NUM1 = 3;
$NUM2 = 4;

$NUM3 = $NUM1 ** $NUM2;
echo $NUM3;
?>

1. 12
2. 81
3. Garbage value
4. None of the above

1. Arithmetic operator
2. Logical operator
3. Comparison operator
4. Conditional operator

1. ==
2. !=
3. ===
4. < = >

Options:

1. A and B
2. C and D
3. A, B, and C
4. A, B, C, and D

<?php
$NUM1 = 3;
$NUM2 = 4;

var_dump($NUM1 != $NUM2);
?>

1. bool(true)
2. bool(false)
3. Error
4. None of the above

<?php
$NUM1 = 3;
$NUM2 = 4;

var_dump($NUM1 !== $NUM2);
?>

1. bool(true)
2. bool(false)
3. Error
4. None of the above

<?php
$NUM1 = 3;
$NUM2 = 4;

var_dump($NUM1 <=> $NUM2);
?>

1. int(0)
2. int(-1)
3. int(1)
4. Error

<?php
$num = "Hello";
var_dump($num);
?>

1. Dot (.)
2. =
3. .=
4. @

<?php
echo $country = $country ?? "india";
?>  

1. india
2. garbage value
3. Error
4. None of the above

1. < == >
2. ===
3. ??
4. ?