Jb Academy Interview Questions and Answers

Q1. Difference between useMemo and useCallback ?
Ans. 
useMemo is used to memoize a value, while useCallback is used to memoize a function.
• useMemo is used to memoize a computed value and recompute it only when its dependencies change.

• useCallback is used to memoize a callback function and prevent unnecessary re-renders.

• Example: useMemo can be used to memoize the result of a complex computation, while useCallback can be used to memoize an event handler function.
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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. Introduce yourself Tell about the company Job role description General marketing questions
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Q2. Difference between market and sales
Ans. 
Market is the overall demand for a product or service, while sales is the actual process of selling that product or service to customers.
• Market refers to the potential customer base and overall demand for a product or service

• Sales is the actual process of selling the product or service to customers

• Market analysis helps in understanding the demand and competition in the market

• Sales strategies focus on converting leads i...read more
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Q1. No response two time going for interview fisrt secound and third around cleyer but till the time no response...
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Q2. Yet no response for interview result. Three raund complete my interview but no response...all most 1 month and 5 day completed
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Q1. General questions about you, with intro etc
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Q1. General questions abot your work / exp
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Q1. Tell me about yourself and our introduction
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Q2. What is your knowledge about business development
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Q3. Why did you choose marketing field
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Q1. Introduce yourself
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Q2. What are the skills which possess
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Q3. What is your educational and professional background
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Q4. What is your expectations from the company
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Q1. Excel and Google sheet
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