TekFriday Processing Solutions UI Developer Interview Questions, Process, and Tips

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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Q1. Indroduction
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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. Given UI task display like display boxes side by side in desktop screen and one after the other in mobile screen using media queries?
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Q2. Explain difference between authorization vs authentication?
Ans. 
Authentication verifies a user's identity, while authorization determines what a user can access.
• Authentication confirms a user's identity through credentials like username and password.

• Authorization controls access to resources based on the authenticated user's permissions.

• Example: Logging into a website (authentication) and then being able to view/edit specific pages based on your role (authorization).
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Q3. How to render list in react? Also explain difference between state vs prop in react?
Ans. 
To render a list in React, use map() function to iterate over an array of data and return a list of components. State is mutable data managed within a component, while props are immutable data passed from parent to child components.
• To render a list in React, use map() function to iterate over an array of data and return a list of components.

• Example: const items = ['item1', 'item2', 'item3']; items.map(item =>

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Q1. What are the webpage optimization techniques? How to check webpage optimization? In lighthouse optimization reports , how to fix issue related render blocking scripts?
Ans. 
Webpage optimization techniques include minifying CSS and JS files, optimizing images, using asynchronous loading for scripts, and reducing render-blocking scripts.
• Minify CSS and JS files to reduce file sizes and improve loading times.

• Optimize images by compressing them and using the correct file format (e.g. JPEG for photographs, PNG for graphics).

• Use asynchronous loading for scripts to prevent them from blocking the ...read more
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Q2. Write scss code nested li element by applying background color 2 element and also use mixins?
Ans. 
Use SCSS to apply background color to nested li elements and utilize mixins.
• Use nesting to target the li elements within a parent element

• Apply background color to the 2nd li element using the :nth-child() selector

• Define and use mixins to reuse styles across the codebase
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Q3. How to fix cumulative layout shift issues?
Ans. 
To fix cumulative layout shift issues, ensure all images and media have dimensions specified in HTML, use CSS aspect ratio boxes, and prioritize loading critical resources.
• Specify dimensions for all images and media in HTML to prevent layout shifts.

• Use CSS aspect ratio boxes to reserve space for images before they load.

• Prioritize loading critical resources to avoid sudden layout changes.
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