TRINITY SALES & SERVICES 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.
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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().
Answered by AI
Add your answer

Frontend assignment make the CRUD application using of reactj.s

Q1. General questions about you, with intro etc
Add your answer

Q1. General questions abot your work / exp
Add your answer

Q1. Tell me about yourself and our introduction
Add your answer
Q2. What is your knowledge about business development
Add your answer
Q3. Why did you choose marketing field
Add your answer

Q1. Introduce yourself
Add your answer
Q2. What are the skills which possess
Add your answer
Q3. What is your educational and professional background
Add your answer
Q4. What is your expectations from the company
Add your answer

Q1. Excel and Google sheet
Add your answer

Good interaction with Founder