Server Side Scripts and Web Servers Overview

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Which operator is used for string concatenation in PHP?

+

*

/

. (correct)

What is the result of the operation '5 + "7"' in PHP?

13

57

Not a valid operation

12 (correct)

Which function in PHP is used to obtain a variable's type as a string?

typecast

gettype (correct)

is_string

is_int

In PHP, how are single-line comments denoted similar to Java?

<h1></h1> Signup and view all the answers

What does the function 'strlen' do in PHP?

Returns the length of a string Signup and view all the answers

What is the naming convention for variables in PHP?

Names are case-sensitive and must start with $ Signup and view all the answers

Which function is used to find the position of the first occurrence of a substring within a string in PHP?

strpos Signup and view all the answers

Which variable type is not one of the basic types in PHP?

char Signup and view all the answers

What is the result of 'strcmp($name, 'Brian Le')' if $name = 'Stefanie Hatcher'?

0 Signup and view all the answers

Which PHP function is used to extract a part of a string based on starting position and length?

substr Signup and view all the answers

In PHP, what is the purpose of the 'implode' function?

Joins array elements with a string Signup and view all the answers

What is the function of a web server when you type a URL in your browser?

Look up the server's IP address using DNS Signup and view all the answers

In the context of web servers, what does PHP or ASP offer as an advantage?

Enhanced security due to hidden server code Signup and view all the answers

What does server-side scripting allow web pages to do?

Customize a web page for individual users Signup and view all the answers

Which term is used to describe programs written in languages like PHP, Java/JSP, or ASP.NET for web servers?

Server-side pages Signup and view all the answers

Which role does a web server play in providing responses to web requests?

Sending back server-side program outputs Signup and view all the answers

What is the purpose of specifying programs in URLs like 'http://www.facebook.com/home.php'?

Run the specified program on the web server Signup and view all the answers

What is the value of $nonzero after typecasting $student_count as a boolean?

1 Signup and view all the answers

In PHP, which of the following values is considered FALSE?

"0" Signup and view all the answers

What does FALSE print as in PHP?

"" Signup and view all the answers

Which PHP function is used to find the square root of a number?

sqrt Signup and view all the answers

What will be the value of $e after typecasting $d as an integer?

3 Signup and view all the answers

In PHP, what type of value can result from the division between two integers?

Float Signup and view all the answers

What is the correct way to include a variable in a string to avoid ambiguity in PHP?

{$age}th Signup and view all the answers

In PHP, when is a variable considered to be NULL?

All of the above Signup and view all the answers

How can you test if a variable is NULL in PHP?

Using the isset() function Signup and view all the answers

Which of the following will print 'This line isn't going to be reached.' in PHP?

$name = NULL; Signup and view all the answers

What does the following PHP for loop do: for ($i = 0; $i < 10; $i++) { print '$i squared is '.$i * $i;?

Prints the square of numbers from 0 to 9 Signup and view all the answers