INVESMATE Full Stack Developer Interview Questions and Answers

Q1. Difference between useMemo and useCallback ?
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Q2. How we do error handling in js ?
Ans. 
Error handling in JavaScript involves using try-catch blocks, throwing errors, and using error objects.
• Use try-catch blocks to catch errors and handle them gracefully

• Throw errors using the throw keyword to indicate when something goes wrong

• Use error objects like Error, SyntaxError, TypeError, etc. to provide more information about the error

• Handle asynchronous errors using promises and the .catch() method
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Q3. What is Promises ? Write a Polyfill of Promise.all()
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• Promise.all() takes an array of promises and returns a single promise that resolves when all of the input promises have resolved.

• A polyfill for Promise.all() can be implemented using a combination of Promise and Array.prototype.reduce().
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Frontend assignment make the CRUD application using of reactj.s

Q1. Very Polite in nature and good human
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Q2. Some basic Hr question and telephonic tech round
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Q1. Video tech round by Technical hr team
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Q1. All the question are basic and some output based Js question no any practical question base on react and node
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Q2. The interviewer voice is too slow as you can guess very average communication skills .They are asking for question from sheet provided by seniors .make it seems like they aren't well prepared for conductin...read more
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Q1. Tell me about your self
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Q2. Why should I hire u
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Q3. How much salary ru expecting
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Q1. What is virtual Dom
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The Virtual DOM is a lightweight representation of the actual DOM, optimizing updates and rendering in web applications.
• The Virtual DOM is a concept used in libraries like React to improve performance.

• It allows for efficient updates by minimizing direct manipulation of the actual DOM.

• When changes occur, a new Virtual DOM is created and compared to the previous one (diffing).

• Only the differences are updated in the actua...read more
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Q2. What is usememo
Ans. 
useMemo is a React hook that optimizes performance by memoizing the result of a computation.
• useMemo takes two arguments: a function and a dependency array.

• It only recalculates the memoized value when one of the dependencies changes.

• Example: const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);

• Helps avoid unnecessary re-renders and improves performance in functional components.

• Commonly used for ex...read more
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Q1. Speak in good mood
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Q2. Tell me about your profile, job with a good humor
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Learn the basic concept

Q1. ⁸about candidate
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Q2. Experience in last company
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I have 5 years of experience in my last company as a Team Lead.
• Led a team of 10 members in project execution

• Implemented new strategies to improve team productivity

• Conducted regular performance reviews and provided feedback

• Collaborated with other teams to ensure project success
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Q3. Knowledge about current company and process
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Q1. Tell me about yourself ?
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Q2. Do you have any prior experience in sales?
Ans. 
Yes, I have prior experience in sales.
• Worked as a sales associate for 2 years at XYZ company

• Achieved 120% of sales target in the last quarter

• Implemented new sales strategies to increase revenue
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Q1. Why you choose. The role of business development
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I chose the role of business development because of my passion for building relationships and driving growth.
• I have a strong interest in networking and connecting with potential clients and partners.

• I enjoy identifying new business opportunities and developing strategies to capitalize on them.

• I have a track record of successfully growing revenue and expanding market reach in previous roles.

• I am excited about the challe...read more
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Q2. WHERE YOU WILL SEE YOURLSEF AFTER 5 YEARS
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