Updated June 2, 2023
Introduction to Web Technology Interview Questions and Answers
Web technology is defined as the process of communication between two computers means by which two computers communicate between them using a Markup language and different multimedia packages is called web technology. Web technology can also be defined as mediator or medium between a server (web server) and client (web client). Web technology is a front-end programming language used for web development (front end development of a website). These languages are HTML, CSS, and JavaScript where HTML is Hyper Text Markup Language, CSS Cascading Style Sheet for styling the web page and JavaScript is used for the backend of the web development. Web technologies are used to create, maintain and development of web applications and it collectively stands for World Wide Web. A developer will think these as a programming language, Frameworks, and data storage mechanism services which are helpful in the setup of platforms and web applications which can be a host on the web using World Wide Web. Web frameworks such as JavaScript and Python and client-side technologies or programming languages such as HTML, CSS, and JavaScript. In the present job market, there are many job openings for web developers. So we will have a brief look on web technologies and different topics which people may come across during the interview.
Now, if you are looking for a job which is related to Web Technology then you need to prepare for the 2023 Web Technology Interview Questions. It is true that every interview is different as per the different job profiles. Here, we have prepared the important Web Technology Interview Questions and Answers which will help you get success in your interview.
In this 2023 Web Technology Interview Questions article, we shall present 10 most important and frequently asked Web Technology Interview Questions. These questions are divided into two parts are as follows:
Part 1 – Web Technology Interview Questions (Basic)
This first part covers basic Web Technology Interview Questions and Answers
Q1. What is the use of Webkit in CSS3?
Answer:
Webkit is a core software component or module which will render the HTML code and CSS on different browsers like Chrome and Safari. In the market, there are some rendering tool engines for other browsers such as Presto for Opera, Gecko for Mozilla Firefox and Microsoft Edge for Internet Explorer. In order to use Webkit in web pages we need to render “-webkit” along with CSS in HTML code. Let us see an example as below:
-box-shadow {
-webkit-box-shadow : 0px 5px 0px 5px #ffffff;
-box-shadow : 0px 0px 5px 5px #ffffff;
}
Q2. What are the CSS Box Model and its components?
Answer:
The box model is common in HTML as everything mostly will represent in form of boxes only. Similarly, box model in CSS also used in modeling and designing the layouts for its elements and its main components as below:
- Border: The border component will get affected by the padding and content fields used around the border and we can change the background color of the border also.
- Margin: This component is the top layer of the CSS box model.
- Padding: This component defines the spacing in the box model that is the positioning of elements in the box.
- Content: This component represents the content needs to show in the box.
Let us move to the next Web Technology Interview Questions
Q3. What is the difference between undefined value and Null value in JavaScript?
Answer:
In general, an undefined value will be assigned to a particular variable when a variable is declared but not assigned any value to it than the JavaScript engine assigns some garbage value to that variable. Whereas Null value is assigned to a variable when a variable is declared and assigned with null value in code. The null value is an object whereas undefined value is a type.
Q4. Mentions the APIs which are approved by HTML5 recently?
Answer:
This is the basic Web Technology Interview Questions asked in an interview. The APIs which are approved by HTML5 are media API, application cache API, text tracking API, history API, data transfer API, command API, user interaction API, and constraint validation API are the APIs approved by HTML5 recently.
Q5. How JavaScript handles automatic type conversion of variables?
Answer:
As JavaScript is a dynamic language as per ECMS standards and weekly typed which means in JavaScript, we can use a function as an argument to the other function ( one function accepts another function as an argument). JavaScript handles automatic type conversion as it supports auto-type conversion whenever a variable or expression or statement is not getting its type as input then JavaScript will perform auto-type conversion to match the variable data type.
Part 2 – Web Technology Interview Questions (Advanced)
Let us now have a look at the advanced Web Technology Interview Questions.
Q6. What is the difference between session storage and local storage objects in HTML?
Answer:
The difference between session storage and local storage is described as below
- Local Storage: In local storage, objects don’t have any expiry for the data stored in it and local storage object have no permission to delete the data after the browser is closed.
- Session Storage: Whereas session storage keeps objects in it up to when the session is alive and it clears the data stored in it when the session is closed.
Q7. What are the different types of popup boxes available in JavaScript?
Answer:
In JavaScript, there are three types of popup boxes we can use and they are as below
- Alert: This popup box will display a message with an Ok button to proceed further.
- Confirm: This popup window will have display a message with an Ok and Cancel buttons and we need to click one to proceed further.
- Prompt: This popup is a dialog box which asks input from a user and has Ok and Cancels buttons after entering user input to proceed further.
Let us move to the next Web Technology Interview Questions
Q8. What is Z-index in CSS?
Answer:
The z-index in CSS is a property which is used to define the stack order of the elements based on which elements will display on the web page (i.e. higher order elements will display before the lower order elements in the web page) and we can apply z-index only to position elements like position: absolute, position: relative, position: fixed etc.
e.g:
div {--
Position: absolute;
Left: 10px;
z-index: -1;
}
Q9. What is the difference between Canvas and SVG?
Answer:
This is the most asked Web Technology Interview Questions in an interview. The difference between Canvas and SVG is defined as below:
Canvas doesn’t provide support for event handlers, depends on the resolution, ideal for graphic-intensive games development, and works for only small rendering areas of the web page whereas SVG doesn’t depend on the resolution and provides support for event handlers, not suitable for gaming, and performs well for the rendering of large areas like Google map etc.
Q10. What are the new form elements in HTML5?
Answer:
The new form elements introduced in HTML5 are as below:
- Output: This form element defines the result of an expression.
- Datalist: This form element is used to specify a list of options for input controls.
- Keygen: This form element is used to generate encrypted keys.
Conclusion
Finally, it’s an overview of interview questions and topics discussed on web technologies. I hope you are preparing well for the interview and this article will help you further in the preparation and enables you to crack the interview.
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