Millipixels Senior Front end Developer Interview Questions and Answers

Q1. Explain clousers with example
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Q2. What is hosting
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Q3. What is event loop?
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Q4. Explain promise? Difference between promise.all and promise.race
Ans. 
A promise is an object representing the eventual completion or failure of an asynchronous operation.
• A promise can be in one of three states: pending, fulfilled, or rejected.

• Promises allow for cleaner asynchronous code, avoiding callback hell.

• Example of a promise: const myPromise = new Promise((resolve, reject) => { /* async code */ });

• Promise.all takes an array of promises and resolves when all are fulfilled, or rej...read more
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Q5. Explain de lbouncing and throutling
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Q6. How to optimise your application in react
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Q7. Explain component Life cycle
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Component lifecycle refers to the stages a component goes through from creation to removal in a front-end framework.
• 1. Mounting: The phase when a component is being created and inserted into the DOM. Example: constructor(), render().

• 2. Updating: Occurs when a component's state or props change. Example: shouldComponentUpdate(), componentDidUpdate().

• 3. Unmounting: The phase when a component is removed from the DOM. Examp...read more
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Q1. Output questions on JavaScript.(Array, hoisting, event)
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Q2. Questions on React and Redux
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Q1. React JS and Java script
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Q1. Basic components communication
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Q2. Forms based questions
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First round is online assessment. Where we have multiple choice questions related to angular, css. Html, javascript

Q1. AOT. JIT compilers, Pipes, Services, Singleton component
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Q2. Have you developed website for physically challenged ppl, accessibility
Ans. 
Yes, I have experience developing websites for physically challenged individuals with a focus on accessibility.
• Implemented keyboard navigation for users with mobility impairments

• Utilized ARIA roles and attributes to improve screen reader compatibility

• Ensured color contrast and text size met WCAG standards

• Tested websites with assistive technologies like screen readers and voice recognition software
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Q1. What is Hositing
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Q2. What is closure
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Q1. Interviewer asked about depth in React Js and JavaScript. JavaScript questions - Hoisting, implementation of closure, difference between call, bind & apply. Logic implementation of suggestions list in sea...read more
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Q1. He asked about both technical and non technical related questions. Previous organisation works. What i have faced difficult y in previous organisation. And some scenario based questions.
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They asked JS basics and Promises, hoisting

Just asked about my work culture, as I worked in startup and product based company, they except me work in Agile and how u will adopt to MNC / service based company culture