CertEra 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. General questions about you, with intro etc
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Q1. General questions abot your work / exp
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Q1. Tell us about your Strengths and Weaknesses.
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Q2. What is guerrilla Marketing?
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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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Write a program to find the maximum value in an array of integers.

A bat and ball together cost $1.10. The bat costs $1 more than the ball.

Q1. Excel and Google sheet
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Good interaction with Founder

Q1. Tell me about your self
Ans. 
I am a motivated and creative individual with a passion for social media marketing.
• Experienced in creating engaging content for various social media platforms

• Proficient in analyzing social media metrics to optimize marketing strategies

• Strong communication skills and ability to work well in a team
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Q2. Your strength and weakness
Ans. 
My strength is my creativity and ability to think outside the box. My weakness is sometimes being too detail-oriented.
• Strength: Creativity in designing engaging social media content

• Strength: Ability to come up with innovative marketing strategies

• Weakness: Getting too caught up in minor details and losing sight of the bigger picture
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Q1. Trading kniowledge
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Q2. Structure of markets
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Q1. Tell me about yourself
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Q2. Why want to join sales if you are in Engineering
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