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Basic PHP Quiz 1

Description: Basic PHP Quiz 1
Number of Questions: 10
Created by:
Tags: php

What PHP stands for?

php
  1. Hypertext Preprocessor

  2. Pre Hypertext Processor

  3. Pre Hyper Processor

  4. Pre Hypertext Process

Answer: 1

How does the identity operator === compare two values?

php
  1. It converts them to a common compatible data type and then compares the resulting values

  2. It returns True only if they are both of the same type and value

  3. If the two values are strings, it performs a lexical comparison

  4. It bases its comparison on the C strcmp function exclusively

Answer: 2

Under what circumstance is it impossible to assign a default value to a parameter while declaring a function?

php
  1. When the parameter is Boolean

  2. When the function is being declared as a member of a class

  3. When the parameter is being declared as passed by reference

  4. When the function contains only one parameter

Answer: 3

Variables always start with a ........ in PHP

php
  1. Pond-sign

  2. Yen-sign

  3. Dollar-sign

  4. Euro-sign

Answer: 3

What is the value displayed when the following is executed? Assume that the code was executed using the following URL:

testscript.php?c=25

php
  1. 25

  2. 10

  3. -5

  4. 0

Answer: 3

Choose the appropriate function declaration for the user-defined function is_leap(). Assume that, if not otherwise defined, the is_leap function uses the year 2000 as a default value:

{
$is_leap = (!($year %4) && (($year % 100) ||
!($year % 400)));
return $is_leap;
}

var_dump(is_leap(1987)); /* Displays false /
var_dump(is_leap()); /
Displays true */

php
  1. function is_leap($year = 2000)

  2. function is_leap($year default 2000)

  3. function is_leap($year)

  4. is_leap($year default 2000)

Answer: 1

What is the best way to iterate through the $myarray array, assuming you want to modify the value of each element as you do?

$myarray = array ("My String","Another String","Hi, Mom!");

php
  1. Using a for loop

  2. Using a foreach loop

  3. Using a while loop

  4. Using a do..while loop

Answer: 1

Which language construct can best represent the following series of if conditionals?

if($a == 'a') {
somefunction();
} else if ($a == 'b') {
anotherfunction();
} else if ($a == 'c') {
dosomething();
} else {
donothing();
}

php
  1. A switch statement without a default case

  2. A recursive function call

  3. A switch statement using a default case

  4. A while statement

Answer: 3
Explanation:

A series of if…else if code blocks checking for a single condition as above is a perfect place to use a switch statement

What will the following script output?

$array = '0123456789ABCDEFG';
$s = '';
for ($i = 1; $i < 50; $i++) {
$s .= $array[rand(0,strlen ($array) - 1)];
}

echo $s;

php
  1. A string of 50 random characters

  2. A string of 49 copies of the same character, because the random number generator

  3. A string of 49 random characters

  4. has not been initialized

Answer: 3

What is the output of the following script?

$a = 10;
$b = 20;
$c = 4;
$d = 8;
$e = 1.0;
$f = $c + $d * 2;
$g = $f % 20;
$h = $b - $a + $c + 2;
$i = $h << $c;
$j = $i * $e;
print $j;

php
  1. 128

  2. 42

  3. 256

  4. 342

Answer: 3
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