10+ Front end Web Developer Interview Questions and Answers for Freshers

Geographic position of a user can be obtained using HTML5 Geolocation API.

• Use navigator.geolocation.getCurrentPosition() method to get the user's current position

• The method takes a success callback function which receives a Position object containing the coordinates

• Coordinates include latitude, longitude, and accuracy information

Yes, JavaScript code can be broken into several lines for better readability and organization.

• JavaScript code can be broken into multiple lines using line breaks or the backslash character.

• Line breaks are automatically interpreted as the end of a statement in JavaScript.

• The backslash character can be used to continue a statement onto the next line.

• Breaking code into multiple lines can improve code readability and make it easier to understand and maintain.

• Example: var message ...read more

Use the HTML entity © to insert the copyright symbol in an HTML file.

• Use the HTML entity © to represent the copyright symbol in HTML.

• Place © where you want the copyright symbol to appear in the HTML file.

HTML contains six types of headings, from h1 to h6.

• HTML contains six levels of headings: h1, h2, h3, h4, h5, and h6.

• Each heading tag represents a different level of importance and hierarchy in the content.

• The h1 tag is the highest level of heading and h6 is the lowest level.

The isNaN function is used to determine whether a value is NaN (Not-a-Number) or not.

• The isNaN function returns true if the value is NaN, otherwise false.

• It is commonly used to validate numeric input in JavaScript.

• NaN is a special value representing an unrepresentable or undefined value in JavaScript.

• The isNaN function can be used with both numbers and strings.

JavaScript has several datatypes including string, number, boolean, object, array, null, and undefined.

• String: represents a sequence of characters

• Number: represents numeric values

• Boolean: represents true or false

• Object: represents a collection of key-value pairs

• Array: represents an ordered list of values

• Null: represents the intentional absence of any object value

• Undefined: represents an uninitialized variable

Webkit is a rendering engine used by browsers to display web pages and is used for CSS3 animations and transitions.

• Webkit is a layout engine used by Safari, Chrome, and other browsers.

• It is used for CSS3 animations and transitions.

• Webkit is responsible for rendering web pages in the browser.

• It supports various CSS3 features like gradients, shadows, and reflections.

• Webkit prefixes are used to target specific browsers for CSS3 properties.

The Marquee tag is an HTML element used to create scrolling text or images on a web page.

• The <marquee> tag is used to create a scrolling effect horizontally or vertically.

• It has attributes like behavior, direction, scrollamount, scrolldelay, etc.

• Example: <marquee behavior='scroll' direction='left'>Scrolling text</marquee>

Embedded style sheet is CSS code written within the <style> tag in the head section of an HTML document.

• Embedded style sheet is used to define styles for a single HTML document.

• It is written within the <style> tag in the head section of the HTML document.

• Styles defined in the embedded style sheet will only apply to the HTML document it is written in.

Z-index is a CSS property that controls the stacking order of elements on a web page.

• Higher z-index values place elements on top of lower ones

• Z-index only works on positioned elements (position: absolute, position: relative, position: fixed)

• Negative z-index values place elements behind the default stacking order

• Z-index can be used to create layered effects on a web page

To center a div element, use CSS properties like display, margin, and text-align.

• Set the display property of the div element to 'block' or 'inline-block'.

• Use margin property with 'auto' value for left and right margins.

• For inline elements, use text-align property with 'center' value on the parent container.

HTML is a markup language used for creating the structure of web pages.

• HTML stands for HyperText Markup Language

• It is used to create the structure of web pages by using tags

• Tags are enclosed in angle brackets, like <tag>

• Example: <h1>This is a heading</h1>

Working with arrays of objects is essential in frontend development for managing and displaying data efficiently.

• Use map() to iterate over an array of objects: const names = users.map(user => user.name);

• Filter objects based on a condition: const activeUsers = users.filter(user => user.isActive);

• Sort objects by a property: const sortedUsers = users.sort((a, b) => a.age - b.age);

• Access properties using dot notation: const firstUserName = users[0].name;

• Combine multiple arrays of...read more