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Q:

Why was PHP developed, what it is used for, and where can you get it?

Answer

PHP developed for less script, time saving, Free Open Source Software and runs on different platforms such as Windows, Linux, Unix, etc. PHP compatible with almost all servers used today such as Apache, IIS, etc.

The PHP scripting language resembles JavaScript, Java, and Perl, These languages all share a common ancestor, the C programming language. PHP has full access to the information that the server has, and very little access to information that the client has. In fact, it only has information that the client tells the server and that the server passes on to PHP. Because it is on the server, however, PHP cannot be modified by the client. While you cannot necessarily trust the information that the client gives to PHP, you can trust that your PHP is doing what you told it to do. Because PHP is on the server end, your PHP scripts can affect your server -- such as by keeping an activity log or updating a database.

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Subject: PHP

Q:

What is the difference between "==" and "==="?

Answer

"==" checks equality only,
"===" checks for equality as well as the type.

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Subject: Web Technology

Q:

What does isNaN function do?

Answer

It Return true if the argument is not a number.

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Subject: Web Technology

Q:

What is mean by "this" keyword in javascript?

A) It refers current object B) It referes previous object
C) It is variable which contains value D) None of the above
 
Answer & Explanation Answer: A) It refers current object

Explanation:
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Q:

Which of the following navigator object properties is the same in both Netscape and IE?

A) navigator.appCodeName B) navigator.appName
C) navigator.appVersion D) None of the above
 
Answer & Explanation Answer: A) navigator.appCodeName

Explanation:
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Q:

How do you put a message in the browser's status bar ?

A) status("put your message here") B) window.status = "put your message here"
C) statusbar = "put your message here" D) window.status("put your message here")
 
Answer & Explanation Answer: B) window.status = "put your message here"

Explanation:
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Q:

Which of the following is not considered a JavaScript operator?

A) new B) this
C) delete D) typeof
 
Answer & Explanation Answer: B) this

Explanation:
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Q:

What is the correct JavaScript syntax to write “Hello World”?

A) System.out.println( B) println (
C) document.write( D) response.write(
 
Answer & Explanation Answer: C) document.write(

Explanation:

document.write() is a JavaScript command that literally writes out whatever you place between the opening and closing parentheses.

 

 

What_is_the_correct_JavaScript_syntax_to_write_“Hello_World”1556279922.jpg image 

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