Sharpener Interview Questions and Answers

Array, string, and some map questions

Q1. About js , and about react js
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Q2. What is callback?
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A callback is a function passed as an argument to another function, which is then executed after the first function has completed.
• Callback functions are commonly used in asynchronous programming to handle responses or events.

• Callbacks can be synchronous or asynchronous.

• Example: setTimeout(callback, 1000) will execute the callback function after 1 second.
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Q3. What is useEffect
Ans. 
useEffect is a hook in React that allows functional components to perform side effects.
• Used to perform side effects in functional components

• Executes after render

• Can be used to fetch data, subscribe to events, update the DOM, etc.
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Q4. When we use useEffect
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useEffect is used in React to perform side effects in function components.
• useEffect is used to perform side effects in function components, such as data fetching, subscriptions, or manually changing the DOM.

• It runs after every render by default, but you can specify dependencies to control when it runs.

• Example: useEffect(() => { console.log('Component mounted'); }, []);
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Q1. They will take more mock interviews to upskill the students which helps me to broaden my skills
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Return a reverse string from first to last

Q1. What are microservices in javascript
Ans. 
Microservices in JavaScript are small, independent, and loosely coupled services that work together to form a larger application.
• Microservices are designed to be modular and scalable

• Each microservice performs a specific task and communicates with other microservices through APIs

• They can be written in different programming languages and can run on different servers

• Examples of microservices in JavaScript include Netflix,...read more
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Q1. Hobbies, Introduction, About.
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Q1. Asked about pitch. Know about me, asked some different questions.
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