FIS UI Developer Interview Questions and Answers

Q1. Reverse a String in Javascript
Ans. 
To reverse a string in Javascript, we can use the built-in reverse() method.
• Convert the string to an array using split() method

• Use the reverse() method to reverse the array

• Convert the reversed array back to a string using join() method
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Q1. Explain difference between inline and inline block
Ans. 
Inline elements do not start on a new line and only take up as much width as necessary, while inline-block elements can have a width and height set.
• Inline elements do not start on a new line and only take up as much width as necessary

• Inline-block elements can have a width and height set

• Inline elements ignore top and bottom margins and padding, while inline-block elements respect them
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Q2. Described semantic html
Ans. 
Semantic HTML is a way of writing HTML that focuses on the meaning of the content rather than its appearance.
• Semantic HTML uses tags that clearly define the purpose of the content, such as <header>, <footer>, <nav>, <article>, <section>, <aside>, <main>.

• It helps improve accessibility for users with disabilities by providing more context to screen readers and other assistive tec...read more
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Q1. Indroduction
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Q1. What is lazy loading? What is routing and how to implement it? How to implement observables? What is promise? How to achieve asynchronous call in javascript?
Ans. 
Lazy loading is a technique to defer loading of non-critical resources until they are needed.
• Lazy loading improves page load time and performance.

• It is commonly used for images, videos, and other media files.

• Lazy loading can be implemented using JavaScript libraries like LazyLoad or by using the Intersection Observer API.

• Lazy loading can also be implemented in frameworks like Angular and React.
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Q2. What is HTML5? What is css3? How to achieve media queries?
Ans. 
HTML5 is the latest version of the HTML standard, CSS3 is the latest version of the CSS standard, and media queries are used in CSS to apply different styles based on device characteristics.
• HTML5 is the fifth and latest version of the HTML standard used for structuring content on the web.

• CSS3 is the latest version of the CSS standard used for styling web pages.

• Media queries in CSS allow for responsive design by applyin...read more
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Q1. React State Management
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Q2. State vs Props, Redux, Routing
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Q1. For loop fine the array value
Ans. 
Using a for loop to find a specific value in an array of strings.
• Use a for loop to iterate through the array

• Check each element to see if it matches the desired value

• Return the index of the matching element or -1 if not found
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Q2. For loop fine the array valu
Ans. 
To find array values using for loop
• Declare a variable to store the sum of array values

• Use a for loop to iterate through the array

• Access each element using array[index] syntax

• Add the element value to the sum variable

• Return the sum variable
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