Besant Technologies Junior Web Developer Interview Questions and Answers

Q1. Hoisting in javascript
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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. Elevator pitch. About the past exp .....
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Q1. Simple introduction
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Q1. Was asked a basic sliding window question.
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Q1. Also a brief introduction about my self
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Q1. Show project and explain
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Q2. Basic javascript
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Mostly quantitative and qualitative reasoning questions

Graph,trees,arrays and strings

Q1. Self Introduction
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Q2. Why you choos this domain
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Q1. What's are my qualifications?
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Q2. How Much Experience Does I Have?
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Q3. How Can I Manage The Pressure?
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Managing pressure involves setting priorities, staying organized, taking breaks, and seeking support.
• Set priorities and focus on high-impact tasks first

• Stay organized with to-do lists and schedules

• Take breaks to recharge and avoid burnout

• Seek support from colleagues or mentors for guidance and advice
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Q1. What I Know About Them or Their Product?
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Q2. How Can I Convince Parents and Students To Join Us?
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Q3. What Will I Do If Pressure Is High ?
Ans. 
I thrive under pressure and use it as motivation to excel in my work. I remain calm, prioritize tasks, and communicate effectively with my team.
• Stay calm and composed

• Prioritize tasks based on urgency and importance

• Communicate effectively with team members to delegate tasks and support each other

• Focus on problem-solving and finding solutions rather than getting overwhelmed
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Q4. How Can I Manage This With My Study?
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Q5. How Can I Represent Their Product If Somebody Says'Not Interested'?
Ans. 
By addressing their concerns, highlighting benefits, and offering a solution, you can turn a 'Not Interested' into a potential sale.
• Ask open-ended questions to understand their objections

• Address their concerns and offer solutions

• Highlight the unique benefits and features of the product

• Share success stories or case studies to demonstrate value

• Offer a trial or demo to showcase the product in action
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Q6. Why You Quit Your Previous Job?
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Q7. What are Your Works In Previous Job?
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