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PHP Interview Questions on Variables - 10

Question: 1

In PHP all variables must begin with a dollar sign character?

(A) True
(B) False

Compiler
Level: Beginner Category of MCQ: variables

Question: 2

Find correct way of declaring variables:

(A) $-a = 10;
(B) $1a = 10;
(C) $1a1 = 10;
(D) $a1 = 10;

Compiler
Level: Beginner Category of MCQ: variables

Question: 3

Find incorrect way of declaring variables:

(A) $a1 = 10;
(B) $$a = 10;
(C) $$$a = 10;
(D) $1a = 10;

Compiler
Level: Beginner Category of MCQ: variables

Question: 4

<?php

$a = 10 + 10 * (2 + 3) / 3+ 1;

echo "$a";
?>

(A) 32
(B) 27.67
(C) 27
(D) 34.33

Compiler
Level: Beginner Category of MCQ: variables

Question: 5

<?php

$a = 10+10*5+15/5;
echo "$a";

?>

(A) 23
(B) 63
(C) 90
(D) 80

Compiler
Level: Beginner Category of MCQ: variables

Question: 6

<?php

$a = (10+10)*5+15/5;
echo "$a";

?>

(A) 63
(B) 103
(C) 23
(D) 160

Compiler
Level: Beginner Category of MCQ: variables

Question: 7

<?php

$a = 5/3;
echo "$a";

?>

(A) 1.67
(B) 1.60
(C) 1.6666666666667
(D) 1.0

Compiler
Level: Beginner Category of MCQ: variables

Question: 8

<?php

$a = 5;
echo "$a-$a";

?>

(A) 0
(B) 5-5
(C) $a-$a
(D) Compilation Error

Compiler
Level: Beginner Category of MCQ: variables

Question: 9

<?php
$x = 4/5*3;
$y = 1/.3;
$x ^= $y;
$y ^= $x;
$x ^= $y;
echo "$x, $y";
?>

(A) 0, 3
(B) 2, 3
(C) 3, 2
(D) 0, 4

Compiler
Level: Expert Category of MCQ: variables

Question: 10

<?php
$a=0;
$b=0;

for($i=0;$i<10;$i++)
{
      if(++$a<5 || $b++<7){  }
}
echo $a." ".$b;
?>