Infollion Research Services Frontend Developer Intern Interview Questions and Answers

Quantitative aptitude, logical apptiude,

Q1. Data structure and algorithms
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Q2. Programming concepts
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We discussed on the challenges I faced in the past

Q1. Clone a Todo Application UI using ReactJS, Sass
Ans. 
Clone a Todo Application UI using ReactJS, Sass
• Create a new ReactJS project using create-react-app

• Design the UI using Sass and implement it in ReactJS

• Use state and props to manage the todo list

• Add functionality to add, delete and mark tasks as complete

• Implement local storage to persist data

• Test the application thoroughly
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Q2. Explain the order of specifity in CSS classes, elements, ids, etc
Ans. 
Explanation of CSS specificity hierarchy
• Inline styles have the highest specificity

• IDs have higher specificity than classes and elements

• Multiple selectors with the same specificity are resolved by the order in which they appear in the stylesheet

• The universal selector (*) has the lowest specificity
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This round was more focused on the problem solving. 2 coding questions were asked. The round was for an hour

Q1. How does Server-Side Rendering work?
Ans. 
Server-Side Rendering (SSR) is the process of rendering web pages on the server and sending the HTML to the client.
• SSR improves website performance and SEO by reducing load times and providing search engines with fully rendered pages.

• React provides a library called ReactDOMServer that allows developers to render React components on the server.

• SSR requires a server-side framework or library, such as Next.js or Gatsby, t...read more
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Q1. ES6,filter,map,semantic elements, life cycle hooks of angular
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Q1. Closure, promises,observable,http interceptor , custom directive, box model
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Q1. It was more of discussion to get to know about organization
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Q1. Why are you looking for a change?
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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Q1. How did you find out about us?
Ans. 
I found out about your company through a job search website.
• I was actively searching for UI Frontend Developer positions

• I came across your job posting on a popular job search website

• I researched your company and was impressed with your mission and values
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Q1. What is the difference between on-page seo and off-page seo?
Ans. 
On-page SEO refers to optimizing elements on a website to improve search engine rankings, while off-page SEO involves external factors like backlinks and social signals.
• On-page SEO includes optimizing meta tags, headings, content, and images on a website.

• Off-page SEO involves building backlinks from other websites, social media shares, and online reputation management.

• Examples of on-page SEO techniques are keyword opti...read more
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Q2. On-page seo is optimizing within the
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Quantitative aptitude, logical apptiude,

Q1. Data structure and algorithms
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Q2. Programming concepts
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Q1. What is the difference between ==and === in JavaScript?
Ans. 
The difference between == and === in JavaScript is that == compares only the values, while === compares both values and types.
• The == operator compares two variables by converting them to the same type before making the comparison.

• The === operator compares two variables without type conversion, so they must be of the same type to be considered equal.

• Example: 1 == '1' will return true, but 1 === '1' will return false.
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Q2. ==compare values with type coerion=== is that
Ans. 
Yes, the question is asking about comparing values with type coercion in JavaScript.
• In JavaScript, the == operator compares values with type coercion, meaning it will convert the operands to the same type before making the comparison.

• For example, 1 == '1' will return true because the string '1' is converted to a number before comparison.

• However, 1 === '1' will return false because the strict equality operator (===) doe
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