PHP quiz questions

The PHP syntax is most similar to:

1. Perl and C

2. VBScript

3. JavaScript

What is the correct way to end a PHP statement?

1. </php>

2. ;

3. New line

4. .

All variables in PHP start with which symbol?

1. $

2. !

3. &

How do you write "Hello World" in PHP

1. "Hello World";

2. echo "Hello World";

3. Document.Write("Hello World");

PHP server scripts are surrounded by delimiters, which?

1. <&>...</&>

2. <?php...?>

3. <?php>...</?>

4. <script>...</script>

Which statement about the code below is correct?

class A {}
class B {}
class C extends A, B {}

1. the code is perfectly fine

2. classes can not be empty

3. class C can not extend both A and B

4. qualifiers 'public' or 'private' are missing in class definitions

What gets printed?

$str = 'a\\b\n'; 
echo $str;

1. ab(newline)

2. a\b(newline)

3. a\b\n

4. a\\b(newline)

5. a\\b\n

What will be printed by the below code?

$a = 1;
{
  $a = 2;
}
echo $a, "\n";

1. 1

2. 2

What will be printed?

$a = array();
if ($a[1]) null;
echo count($a), "\n";

1. 0

2. 1

3. 2

4. this code won't work

What gets printed?

class MyException extends Exception {}
try {
  throw new MyException('Oops!');
} catch (Exception $e) {
  echo "Caught Exception\n";
} catch (MyException $e) {
  echo "Caught MyException\n";
}

1. Caught Exception

2. Caught MyException

What will be printed?

$a = array(
  null => 'a',
  true => 'b',
  false => 'c',
  0 => 'd',
  1 => 'e',
  '' => 'f'
);
echo count($a), "\n";

1. 2

2. 3

3. 4

4. 5

5. 6

What will be printed?

$var = 'a';
$VAR = 'b';
echo "$var$VAR";

1. aa

2. bb

3. ab

Which of the following is NOT a valid PHP comparison operator?

1. !=

2. >=

3. &&&

4. <>

5. ===

What will be printed?

if ('2' == '02') {   
  echo 'true';
} else {
  echo 'false';
}

1. true

2. false

What will be the value of $var below?

$var = true ? '1' : false ? '2' : '3';

1. 1

2. 2

3. 3

What gets printed?

<?php
$RESULT = 11 + 011 + 0x11;
echo "$RESULT";
?>

1. 11

2. 22

3. 33

4. 37

5. 39

What will be printed?

if (null === false) {
  echo 'true';
} else {
  echo 'false';
}

1. true

2. false

3. there is a syntax error

What will be printed?

$a = array();
if ($a == null) { 
  echo 'true';
} else {
  echo 'false';
}

1. true

2. false

Which of the following is NOT a magic predefined constant?

1. __LINE__

2. __FILE__

3. __DATE__

4. __CLASS__

5. __METHOD__

How do we access the value of 'd' later?

$a = array(
    'a',
    3 => 'b',
    1 => 'c',
    'd'
);

1. $a[0]

2. $a[1]

3. $a[2]

4. $a[3]

5. $a[4]