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Entro Labs IT Solutions Interview Questions and Answers
12 Interview questions
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
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.
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.
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
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.
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.
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>
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
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 browse...
CSS can be integrated on a web page by linking an external CSS file, using inline styles, or embedding CSS within the HTML document.
Link an external CSS file using the tag in the
section of the HTML document.Use inline styles by adding the 'style' attribute to HTML elements.
Embed CSS within the HTML document using the