Wap Interview Questions with Answers
Question: 1. Why Is Wap Used In The Browser?
Answer:
WAP is also regarded ad Wireless Application Protocol that is used for the technical requirements.
This provides the gaining access to of the information over the wireless network of the cell services.
WAP is used for the cell devices and act as a browser for the cellular phones that makes use of the protocol used only in telephones.
WAP additionally provide programs like e-mail with the aid of cellular, tracking gadget, sports associated activities, news headlines, and many others.
WAP provides the offerings to be extra secure and open to many clients on the same time with interactive information services.
Question: 2. What Are The Differences Being Brought From Wap 1.1 To Wap 1.3?
Answer:
WAP has developed in supplying the software program and the releases being made by the use of the WAP specs.
WAP offers the software protocol that may be used to beautify the specification over time.
WAP helps group of massive number of cellular operators and marketplace and consists of no in-built technology.
WAP makes use of the efforts by way of offering the signals and notifications to the customers that makes use of mobile and the present day era of it.
PAP is also called Push Access Protocol by means of the usage of the WAP specification that offers greater security.
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Question: 3. What Is The Use Of Deck And Card In Wap?
Answer:
WAP allows the programs to have interaction with the customers the usage of the cell devices or WAP enabled devices.
The display at the devices is small or huge consistent with the requirement and the defining of size is likewise referred to as deck.
Deck is the region in which all the consumer’s enter and responses are evaluated and shown and change takes place consistent with that.
Individual displays are used for the records that carries out the extraordinary tasks and this manner of carrying out the issue is called cards.
The cards appear inside the deck one after another at a time and shop the cardboard in separate documents at the server.
Question: four. What Is The Process To Write Wap Applications?
Answer:
WAP programs are represented in the equal manner as HTML pages and it require no skills of programming.
It presents the use of WMLScript applications this is loosely certain to the programming and its policies.
Scripts that are used within the software provide mini software jogging at the WAP device and carrying out the calculations.
WAP applications also are made to have interaction with the consumer like JavaScript and HTML pages.
WAP programs can be created the use of the server side scripting language and the database that is used to save the statistics like spreadsheet, and many others.
WAP uses the server-based totally programming environment, consisting of Java, and in keeping with that the applications or WML gets generated dynamically.
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Question: 5. What Is The Function Of Wap Simulator?
Answer:
WAP simulator is used to explain the software program that permits the implementation of it is to be carried out on software program at once.
It is used to put in force the tool on the software program in preference to the bodily device like cell phone, and so on.
It permits local WAP improvement of gadgets that may be used as SDKs and through which the WAP applications can be tested.
Simulators are used to jot down the content on line that without delay connects to a given internet site the usage of the HTTP.
WAP simulator is used to view the content written in WML format and it’ll be read through the web browsers as nicely.
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Question: 6. What Is The Procedure To Access Wml Content Using A Simulator?
Answer:
WML content material can be accessed with the aid of the use of the internet browser and typing within the URL this is used to load the web website online.
WAP devices offer special URLs that load the content at once from the hand held gadgets.
It offers the configuration information with the database or others the usage of the simulator like deal with books.
It permits the access of the WML based assets at the web with the use of monitoring offerings.
WAP primarily based content material uses the naming conference that adjustments or alters the www to wap that provides the sources on the WAPsite.
Question: 7. What Are The Limitations Of Accessing The Resources Using Wap?
Answer:
WAP doesn’t permit the getting access to the resources on the Internet because of the constraints of the internet browsers.
It doesn’t show the result when the WAP is used with the Internet on non-public computer systems.
WAP doesn’t offer logistics with the currently running machine and it simply provides a way to get right of entry to to the net content.
WAP can best engage with the backend scripts and databases to fetch the information from the web browsers to show it.
WAP doesn’t offer the having access to of the resources due to the incompatibility of large number of resources to be shared with the users.
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Question: eight. What Is The Difference Between Wmlscript And Javascript?
Answer:
WMLScript is used with the WML pages, whereas JavaScript is used with the HTML pages and it isn’t like minded with WML.
JavaScript is the part of the WAP or Wireless Application Protocol, while WMLScript comes under WML handiest.
WMLScript is used for the customer side scripting and it is not one of a kind from JavaScript, while JavaScript is used for appearing tasks like user input validations and producing of mistakes messages.
WMLScript makes use of the ECMAScript but it isn’t well matched with the JavaScript, whereas JavaScript is absolutely well matched with the HTML.
Question: 9. What Is The Process To Differentiate Between Html And Wml Clients?
Answer:
The differentiation is done on the premise of the person requesting the URL from the net browser having the WAP well matched device.
Web server is hooked up with the WAP Gateway that serves the request by way of sending the HTTP Header that differentiates special User Agent.
The person agents request the URL and on the premise of the request server reaction the use of the server facet scripts.
Server aspect script examines the value and generates the WML corresponding to the utility this is going for walks.
WML gets generated on the idea of request if the devices are WAP like minded in any other case HTML receives generated where the person agent can be detected.
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Question: 10. What Is The Process Of Configuring The Web Server Using Mime Types To Serve Wml?
Answer:
HTML files are accessed by means of the internet browser by sending the request to the web server concerning the files.
MIME extension is used to deliver the messages from the net browser to server and vice versa.
The MIME kind needs to be stored on the server to apply the formats like pix, sounds, phrase processed documents and others.
The association is being made using the filename and the extension through which it needs to be attached and sent over to the Web.
As the request is being given in HTML record inside the browser the extension gets related to the browser and it’s miles being rendered right into a browser.
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Question: eleven. What Is The Process To Integrate Odbc Database With Wml?
Answer:
ODBC database isn’t always an open source generation and used within the computing structures with WML.
ODBC database calls for a bridge to connect it with other technologies used in the software program.
ODBC gets applied inside the software that lets in the application to be created to get admission to the records from the third party database.
SQL queries are embedded with the script and the information can be accessed and written returned to a formatted WML code.
The server this is used to get admission to the content type uses HTTP header from which the WML receives generated.
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Question: 12. Write A Program To Pass Variable To Server-side Scripts?
Answer:
The server side scripts consist of CGI scripts and ASP scripts that allow the WML to insert the data in among the tags.
The tags are used to enter the facts like man or woman’s call, magnificence, deal with, etc using the tag.
The name of the variable is used having the
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Question: thirteen. What Are The Events Loaded By Choosing An Action By The User?
Answer:
User selects the OK choice using the WAP enabled devices then the occasion “onpick” is loaded with the script of sendto.Cgi.
The price is surpassed to the variable termed as sendto as the parameter used in CGI and then it makes use of the WML variable that starts offevolved with $.
The variable call gets encapsulated inside the URL containing the CGI formatted call and fee i.E. Name=fee.
The URL presentations the URL that is being entered by using the WAP person and it calls the URL that is being given within the code.
The use of cgi-lib libraries takes region to make it viable to fetch the cost from the URL.
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Question: 14. What Is The Method To Obtain User Input In Wml Page?
Answer:
WAP permits the use of WML that defines positive tags and elements that can be used to fetch the records from one object to some other object.
The inputs are of different kinds depending upon the selections of the users and imparting the described types.
The enter types can be used to provide the text subject wherein the user can insert the alphanumeric characters to represent the facts.
It additionally affords a manner to select an appropriate alternative from range of alternatives like tag is used to expose the text field.
Question: 15. What Are The Ways Through Which It Can Be Prevent The Wml Deck From Being Read From The Cache?
Answer:
WML deck gets downloaded on the WAP device and the code is saved inside the device until the utility is being shut down or the time is expired.
The code is stored within the WAP device and it permits the request to be despatched locally from the tool to the community.
The caching approach is available that provide a way to use the cache of the net browser and keep the facts.
Caching is time sensitive records and it changes right away consistent with the web pages or the requirements.
Caching may be avoided from the WML deck is by forcing the refreshment of the URL and no longer the usage of the cache that is being stored previously.
Domain Name System(DNS) Interview Questions
Question: 16. What Are The Headers Required In Url?
Answer:
There are four headers required in URL:
Expires: Mon, 01 Jan 1999 12:00:00 GMT: this is used to tell the WAP device about the expiry of the deck and it units the date that was given in the past.
The code this is being written additionally receives expired and removed as soon as the utility receives close down.
Last-Modified: 01 July 2000 12:00:00 GMT: that is used to inform about the date of the deck that became changed before.
It may be used to replace with the valid date and the time values that is being defined using the programming surroundings.
Cache-Control: no-cache, ought to-revalidate: this provides an HTTP header used for the caching of the web page and it is used to save the version of the HTTP header of the server.
Pragma: no-cache
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Question: 17. What Are The Ways In Which An Application Can Notify The User Regarding Specific Events?
Answer:
Notifications are very essential because it maintains the device and the user updated with the information.
Notifications are furnished on WAP gateways and it now not available to be used at present however it has been installed and coded for the consumer’s use.
Notifications can be despatched directly thru the mail to the user in order that they can be notified whilst an event is taking area.
Notifications may be sent on any motion taken by way of the user that involves interplay with the consumer.
This permits the notifications to be disbursed to all of the customers that have implemented for it and interested by getting it.
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Question: 18. What Is The Way To Initiate A Voice Call From A Wap/wml Application?
Answer:
WAP application makes use of WTAI standards to allow the voice calls that may be initiated through the use of WAP.
The software may be run from the WML deck used to save the facts either at once or using the cache.
The code will be written as:
This code gives a WML hyperlink that initiates the technique of voice calls the use of 1-10 digits and calling internationals additionally became famous.
The support for that is being supplied for national and global level of communique and the browser helps WTAI so that it’s far effortlessly reachable.
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Question: 19. What Is The Procedure To Create Graphics Using Wml Pages?
Answer:
Use of bitmap writer that allows the vicinity to, be to be had so that portraits may be created according to the necessities.
Bitmap library isn’t always used for icons and small pix so bitmap editor edits the bitmaps which might be getting created using pixel grid.
Use, of image editing, software and Java converter converting, the images dynamically, in keeping with the necessities.
The graphic may be cropped upto the size of the picture wished after which it is made according to the WAP specification that allocates WAP device memory.
The dimensions are carefully checked and discovered on the WAP gadgets with the same photographs being inserted for the cellular phones.
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Question: 20. What Are The Technical Specifications Required By Wap?
Answer:
WAP provides a fashionable defining the protocol suite that lets in the interoperability of WAP and its software gadget.
WAP is divided in a few protocol suite and it’s far as follows:
Wireless Application Environment (WAE): is used as representation of the facts in human readable shape and execute it to the user facet.
Wireless Session Protocol (WSP): this continues the consultation statistics of the users that are interacting with each other at specific time c language.
Wireless Transaction Protocol (WTP): it continues a node or reproduction of the transaction that occurred among parties.
Wireless Transport Layer Security (WTLS): it affords the security to the statistics this is getting transported to top layer.
Wireless Datagram Protocol (WDP): it’s far used as a adaptation layer and allow the network to offer the shipping to the statistics to top layers.
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Question: 21. What Does The Fieldset Tag Do?
Answer:
When constructing WAP programs, you need to remember the fact that the consumer tool will possibly have a completely small display screen. If you are trying to design a big form, you will want to specify which shape factors are saved collectively on one screen. The fieldset tag agencies together shape elements, and the microbrowser will attempt to maintain corporations on one display. The WML Specification offers an incredible example.
Question: 22. What Does The Postfield Tag Do?
Answer:
The postfield element lets in you to POST a field name and value submission in a URL request, without it having been seen on the posting shape. The WML Specification gives an example of postfield in use.
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Question: 23. What Bearer Types Are Used For Wap In Gsm?
Answer:
In GSM, WAP may be run over the Short Message Service (SMS) or via Circuit Switched Data (CSD). The latter affords a lot greater bandwidth.
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Question: 24. Is Wml Case-sensitive?
Answer:
Yes! And be careful, due to the fact WAP v1.1 uses lower-case tags.
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Question: 25. How Secure Is Wap?
Answer:
One of the layers of the WAP stack, called WTLS, gives encryption and authentication for server-to-client protection. This prevents fraudulent get admission to to WAP transactions and opens the way for e-commerce- and intranet-type programs.
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Question: 26. Does Wap Run Over Gprs?
Answer:
Yes, it is able to do. GPRS is a brand new over-the-air carrier that transmits records packets at hand-held gadgets. It will allow a whole lot faster WAP transmission than presently available over SMS or CSD whilst the usage of GSM.
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Question: 27. Can I Use Java Servlets To Produce Wml Pages?
Answer:
Yes. You can create WML in exactly the identical manner that you create HTML. If you’ve got written your servlets to provide WML,
simply take into account to set the MIME kind correctly:
response.SetContentType(“textual content/vnd.Wap.Wml”);
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Question: 28. Do I Need A Wap Gateway?
Answer:
No. Not always. If you need to serve up easy WAP content material, you may use an current internet server (and simply change the MIME sorts). A cell will connect to your server through a WAP gateway positioned of their cellular operator’s network.
However, there are some advantages to web hosting your applications on a WAP gateway – given that it is a part of the cell network. You can have get entry to to information just like the mobile’s wide variety, identity, and probably vicinity.
Question: 29. Can I Use Cookies With Wap?
Answer:
In principle, sure. However, now not all WAP handsets will support them. Another method to consultation control is to apply hidden form fields containing session identifiers (either in the header using the ‘POST’ method or inside the URL the usage of the ‘GET’ technique.)
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Question: 30. Wsp To Http Witch Part Will Convert In Wap?
Answer:
Actually there’s a getway called wap getway works like a converter. It converts wsp request coming from ME to http to get entry to the net.
Question: 31. What Are The Signals Transferred In Gprs?
Answer:
GPRS is 2.5 generation of GSM. Radio interface is equal as GSM. So i think it also makes use of the same frequency band and moulation. I.E 900/1800Mhz,GMSK modulation.
Question: 32. What Is Wap (wireless Application Protocol)?
Answer:
Wireless Application Protocol (WAP) is a protocol for transmitting statistics between servers and customers (normally small wireless gadgets like cellular phones). WAP is similar to HTTP inside the World Wide Web. Many cell phones consist of WAP browser software program to permit customers get right of entry to to Internet WAP sites.