GetMyUni UI Developer 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. What is your salary expectation ?
Ans. It need to be less than lacks otherwise they will directly reject.
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Q2. How many days you can work ?
Ans. They want you to work Seven days a week. it is like working for 24/7.
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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. Self Introduction
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Q2. Why you choos this domain
Ans. 
I chose the sales domain for its dynamic nature, opportunities for growth, and the ability to connect with diverse people.
• Passion for building relationships: I enjoy meeting new people and understanding their needs, which is crucial in sales.

• Thriving in a competitive environment: Sales challenges motivate me to push my limits and achieve targets.

• Desire for continuous learning: The sales field constantly evolves, allowi...read more
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Q1. Hoisting in javascript
Ans. 
Hoisting in JavaScript is the behavior of moving declarations to the top of their containing scope during compilation.
• Variables declared with 'var' are hoisted, but their initialization is not. Example: console.log(a); var a = 5; // undefined

• Function declarations are fully hoisted, allowing them to be called before their definition. Example: greet(); function greet() { console.log('Hello'); }

• Variables declared with 'le...read more
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Q1. How does your experience align with the role?
Ans. 
My experience in sales includes exceeding targets, building strong client relationships, and implementing successful sales strategies.
• Exceeded sales targets by 20% in my previous role

• Built and maintained strong relationships with key clients, resulting in repeat business

• Implemented a new sales strategy that increased revenue by 30%
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Q2. How did you achieve your targets?
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Q1. Tell me about your self
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Q2. Why should I hire u
Ans. 
I bring a unique blend of technical skills, creativity, and a passion for user-centric design that drives impactful web experiences.
• Proven experience in HTML, CSS, and JavaScript, having built responsive websites that enhance user engagement.

• Strong understanding of frameworks like React and Vue.js, demonstrated by a project where I improved load times by 30%.

• A keen eye for design, as shown in my portfolio where I trans...read more
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Q3. How much salary ru expecting
Ans. 
I expect a competitive salary based on my skills, experience, and industry standards for a Front End Developer.
• Research industry standards: For example, Glassdoor or Payscale can provide insights into average salaries.

• Consider my experience level: With 3 years of experience, I might expect a salary in the range of $70,000 to $90,000.

• Location matters: Salaries can vary significantly based on the cost of living in differ...read more
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Q1. What is virtual Dom
Ans. 
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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