Active Server Pages (ASP) Interview Questions and Answers

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What is ASP?

ASP stands for Active Server Pages.
It is a
server
side technology which
is used to display dynamic content on web pages. For example you could write
code that would give your visitors different information, different images or
even a totally different page depending on what browser
version they are using.


How can you disable the browser to view the code?


Writing codes within the Tag


What is a “Virtual Directory”?


Virtual directories are aliases for directory paths on the server. It allows
moving files on the disk between different folders, drives or even servers
without changing the structure of web pages. It avoids typing an extremely long
URL each time to access an ASP page.


Give the comment Tags for the following?


VBScript : REM & ‘(apostrophe)


JavaScript
: // (single line
comment)

/* */ (Multi-line comments)


Which is the default Scripting Language of ASP (server-side)?

VBScript


Which is the default Data types in VBScript?


Variant is the default data type in VBScript, which can store a value of any
type.


What is a variable?


Variable is a memory location through which the actual values are
stored/retrieved. Its value can be changed.



What is the maximum
size of an
array?


Up to 60 dimensions.


What is Query string collection?


This collection stores any values that are provided in the URL. This can be
generated by three methods:

By clicking on an anchor tag

By sending a form to the server by the GET method

Through user-typed HTTP address

It allows you to extract data sent to the server using a GET request.


What are the attributes of the tags? What are their functions?


The two attributes are ACTION and METHOD

The ACTION gives the name of the ASP file that should be opened next by which
this file can access the information given in the form The METHOD determines
which of the two ways (POST or GET) the browser can send the information to the
server


What are the methods in Session Object?


The Session Object
has only one method, which is Abandon. It destroys all the objects stored in
aSession Object and releases the
server resources they occupied.


What is ServerVariables collection?


The ServerVariables collection holds the entire HTTP headers and also additional
items of information about the server.


What is the difference between Querystring collection and Form collection?


The main difference is that the Querystring collection gets appended to a URL.


What is a Form collection?


The Form collection holds the values of the form elements submitted with the
POST method. This is the only way to generate a Form collection.


What are the ASP Scripting Objects?


The Dictionary object, the FileSystemObject object, TextStream object.


What happens to a HTML page?


The browser makes a HTTP request; the server gives a HTTP response to the
browser and the browser converts into a HTML
page
.


What happens to ASP pages?


The browser makes a HTTP request; the server does the processing and gives a
HTML response to the browser.


How can you change the primary scripting language for a page?


Specify


What is application Object?


Shares information among users of an application.
Gives a notification when
an application starts
or ends.


What is the difference between client-side script and server-side script?


Scripts executed only by the browser without contacting the server is called
client-side script. It is browser dependent. The scripting code is visible to
the user and hence not secure. Scripts executed by the web server and processed
by the server is called server-side script.


What is the command to display characters to the HTML
page?


Response.Write


Explain the POST & GET Method or Explain the difference between them?


POST METHOD:

The POST method generates a FORM collection, which is sent as a HTTP request
body. All the values typed in the form will be stored in the FORM collection.

GET METHOD:

The GET method sends information by appending it to the URL (with a question
mark) and stored as A Querystring collection. The Querystring collection is
passed to the server as name/value pair.

The length of the URL should be less than 255 characters.


How many global.asa files can an Application have?

Only one global.asa file and it’s placed in the virtual directory’s root.


How many global.asa files can an Application have?


Only one global.asa file and it’s placed in the virtual directory’s root.


What are Scripting Objects?


Objects that can enhance the application are
known as the Scripting Objects.


What is the Order of precedence for LOGICAL Operators ?


NOT, AND, OR, XOR, EQV, IMP


What is an Err Object?


Name it’s properties and methods.


What are LOCAL and GLOBAL variables?


Local variables lifetime ends when the Procedure ends.
Global variables lifetime begins at the start of the script and ends at the end
of the script and it can be used by any procedure within
the script. Declaring a variable by using the keyword PRIVATE makes the variable
global within the script, but if declared using PUBLIC, then all scripts can
refer the variable.


Which is the default Scripting Language on the client side?


JavaScript


What is HTML (Hypertext Markup Language)?


It’s a method by which web pages can be built and generally used for formatting
and linking text.


What is a Web Server?

It’s a Computer that provides Web services on the Internet or on a
local Intranet. It is designed to locate, address and send out simple HTML pages
to all other users who access these pages.


What is Session Object?


It stores information about a User’s session.
Gives a notification when
a user session begins
or ends.


What is Server-Side includes?


It provides extra information by which it makes the site easier to manage. It
can include text files using the #include statement, retrieve the size and last
modification date of a file, defines how variables and error messages are
displayed and inserts the values of HTTP variables in the page sent back to the
browser.


What is a FileSystemObject object?

It provides access to the physical file system of the web server. It
gets and manipulates information about all drives in a
server, folders and sub-folders on a drive and files inside a folder.


What is a Scripting Language?


It permits to create more interactive Web Pages. Validation, formatting of web
pages can be done. VBScript, JavaScript are
some examples.


What is a Dictionary object?


It lets you store and retrieve information in a flexible data structure. Each
value or information stored in a Dictionary is associated with a key through
which the information can be retrieved.


What is Global.asa file?


It is text file that contains details about an ASP application,
such as when it should begin and end.


What is an .ASP file?


It is a Text File that contains the combination of the following:

Text

HTML tags

Script Commands


What is Response Object?


It controls the information sent to the user. The various methods are:

Response.Write – Sends information directly to a browser

Response.Redirect – Directs a user to a URL other than the requested URL

Response.ContentType – Controls the type of content sent

Response.Cookies – Sets cookie values

Response.Buffer – To Buffer information


Naming constraints for a variable ?


It can be up to 255 characters Must start with an alphabet Must not contain an
embedded period or full-stop


What is a TextStream object?


It allows you to access(read/write) the contents of text files stored on the web
server.


What is IIS?


IIS is a Web Server that provides Web services, not only for web pages but also
for ftp sites and video and audio services. It integrates with the database
facilities of SQL Server.


What is Request Object?


Gets information from the user. It has five collections by which values can be
accessed. They are: Query string, Form, Cookies, Server Variables & Client
Certificate


What are the special sub-types in VBScript?


EMPTY: has no value

NULL: Value does not exist (conjunction with database)

OBJECT:


What is Cookies collection?


Cookies are text files that store information about the user by which the web
server identifies and marks each different visitor to a web site and determines
where a user has been before. A cookie can store information only when the user
sends it. Individual cookies are limited to 4KB of data. The maximum number of
cookies allowed is 300.

Cookies are stored on client’s machine.


What is the difference between Cookies collection and Form/Query string
collection?


Cookie collection does not have the Count property. Cookies can have multiple
values for the same cookie name but each value can be referred using a key
whereas in a Form/Query string cookie each value has to be referred using an
index value.


What is Server Object?


Controls the ASP execution environment. It can set the amount of time script can
run before an error occurs. Converts a virtual path to a physical path on the
server. Takes a user supplied string and encode it into proper format for a URL
string.


What is Collection?


Collection is a set of name/value pairs where the information supplied by the
client is stored.


How will you delete a Cookie?

By setting its Expires property to any date prior to today
Response.Cookies(“cookie name”). Expires = Date 1.


What is the function of Buffer in Response Object?


Buffer controls the HTML output stream manually.


How are scripts executed?


ASP provides scripting engines that execute the corresponding scripting
languages on the server side. Scripts should be encoded within the Delimiters.


What is ASP (Active Server Pages)?


ASP is a server side-scripting environment for building dynamic and interactive
web pages. Since the scripts run on the server side, the web server does all the
processing.


What are ARRAYS?


Arrays are variables that store items of similar information.DIM ARRAY1(4)
(declares an array with the name array1 with 5 elements)


What is Application-scope?


Application-scope means that variables (and objects) can be accessed from any
ASP pages that is part of the application.


What is Extranet?


An area of a web site available only to a set of registered visitors.


< SCRIPT LANGUAGE=”VBScript” RUNAT=Server >

a = 1

< /SCRIPT >

< SCRIPT LANGUAGE=”VBScript” >

a = 2

< /SCRIPT >

< %

Response.Write a

% <

In the sample code shown above, what will be written to the screen?


A. 1

B. 2

C. 1, 2

D. 1&2

E. Nothing. (Answer)


< % iPos = Instr(“Hello World”,”r”) % <

Referring to the above, what is the value of iPos?


A. 0

B. 1

C. 2

D. 8

E. 9 (Answer)


What are the types of HTML?


Static HTML Browser uses HTTP to request HTML file from the Web Server

Dynamic HTML Browser uses HTTP to request an executable application rather than
a Static HTML file


What are the properties of Session Object?


SessionID returns the session identification number for each user.

Timeout sets the timeout period assigned to the Session object for any
application, in minutes.

CodePage determines the code page that will be used to display content.

LCID a locale identifier, which determines time zone and language, rules for the
system


What are the event handlers of Session Object?


Session _OnStart This event will be fired when a new user begins a session with
the web site.

Session_OnEnd This event is called whenever a session terminates.


Name the ASP Objects?


Request Object

Response Object

Server Object

Session Object

Application Object


What are the advantages of using ASP?

Minimizes network traffic by limiting the need for the browser and
server to talk to each other

Makes for quicker loading time since HTML pages are only downloaded

Allows to run programs in languages that are not supported by the browser

Can provide the client with data that does not reside on the client’s machine

Provides improved security measures since the script cannot be viewed by the
browser


What are the methods in Application Object?


Lock prevents clients from modifying the variables stored in the Application
object.

Unlock removes the lock from variables stored in the Application object.


What are the methods in Application Object?


Internet Information Server (IIS) on Windows NT

Personal Web Server (PWS) on Windows 95

Peer Web Services on Windows NT


What are the browsers that can access ASP pages?


Internet Explorer (supports VBScript, JavaScript)

Netscape Communicator/ Navigator (supports only JavaScript, VBScript can be also
added too)


How does the server identify and execute the server-side scripts within HTML
code?

Including the RUNAT=SERVER attribute


What are the methods by which output stream is controlled?


Flush sends previous buffered output to the client immediately, but continues
processing the script.

Clear erases any already-buffered HTML.

End causes the server to stop processing the script.


What are the properties used to control the expiration of the page?


Expires specifies the number of minutes before a page cached on a browser
expires.

ExpiresAbsolute sets the date and time at which a page cached on a browser
expires.


What are the collections of Session Object?


Contents collection contains all the variables established for a session without
using the tag.

Static collection contains all the objects created



What is the difference between ASP and HTML
? Or Why ASP is better than
HTML?


– ASP executes code on the server side whereas the browser interprets HTML.

– ASP can use any scripting languages

– Gets feedback from the user and return information to the user

– Create pages that will be customized to display only things that will be of
interest to a particular user

– Can edit contents of a web page by updating a text file or a database rather
than the HTML code itself


What are the event handlers of Application Object?


Application_OnStart- This event will be fired when the first visitor hits the
page.

Application_OnEnd- This event runs when the server is stopped.


Name some of the ASP components?


Ad Rotator component- a way to manage advertisements on the web site.

Content Linker component – a technique to direct users through a set of pages on
a web site by creating a list of URLs and description of the next and previous
pages.

Browser Capabilities component – allows to customize the page to the ability of
the browser viewing it.

Database Access component – allows to access data from the database


What are the tasks performed by < FORM > tags?


tags provides space for the user to input values

the form has a button to submit information back to the server

It transfers control to another ASP page

It carries the information in the fields to another ASP page


What are the tags necessary to be present within the <FORM > tag?

—–tag: Provides input spaces (text boxes, combo boxes, radio button,
etc.) on a form called fields. It has three attributes TYPE, NAME and VALUE.
TYPE provides the characteristics of the field and the NAME specifies a name to
the field by which it can be referred.


What are the collections of Application Object?


* Contents collection – contains all variables added via scripts in global.asa.

* Static collection – contains the names of all objects.


How do you create a recordset object in VBScript?

Answer1

//First of all declare a variable to hold the Recordset object, ex-

Dim objRs

//Now, Create this varible as a Recordset object, ex-

Set objRs=Server.CreateObject(ADODB.RECORDSET)

Answer2

” rs.MoveNext

wend

end if

%’>

*. Create Recordset object

*. Place form field value in a variable named “param”

*. Define query by concatenating strings and variable value

*. Open RecordSet Object. Note that the first parameter is the Command Text. The
second parameter is the Connection String. The Command Object and Connection
Object are created implicitly.

*. Make sure the RecordSet isn’t empty

*. Begin executing a loop which goes through all records in the RecordSet.

*. Write each record’s “firstname” and “lastname” fields to the page on a
separate line.

*. Move to Next Record.


Explain the difference between POST and GET Method.


GET requests are string data that is visible to the end user via the URL and a
limit of 2kb, POST requests have no limit on total data and the user can’t see
the data in a query string.


Why do we use Option Explicit?


Answer1

To avoid multiple variables of the same name.

Answer2:

Correct answer is – This statement force the declaration of variables in VB
before using them.


How do you write an SQL insert statement?


insert into tablename (fieldA, fieldB, fieldC)Values(’dataA’, ‘dataB’, ‘dataC’);


How can you have different number of cells for each row of a table in HTML?


using colspan and rowspan


What variable can you use to share info across the whole application for one
user?

Use the sessions object


What is string concatenation function in VBScript?


the ampersand symbol and ampersand space underscore across multiple lines


How do you get the value of a combo box in Javascript?


Answer1.

document.forms[’formName’].elements[’comboName’].options[i].value

Answer2.

document.form_name.element_name.value


What is a class in CSS?


Answer1

A class allows you to define different style characteristics to the same HTML
element.

Answer2

class is a child to the id, id should be used only once, a css class can be used
multiple times:

div id=”banner”

p class=”alert”


When inserting strings into a SQL table in ASP what is the risk and how can you
prevent it?

SQL Injection, to prevent you probably need to use Stored Procedures
instead of inline/incode SQL


Which is the default Data types in VBScript?


Variant.

 

 

 

Source:http://blog.shashankk.com/

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