Techweirdo Interview Questions and Answers

Q1. Basic questions on React.js and Node.js
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Q2. Also express.js was asked
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After resume screening, I was asked to create a data-driven form on a webpage using React and NodeJS.
A data-driven form is a kind of form where we do not hard code the fields(i.e. the data we want to gather by the form) we get the fields from the database instead.

Q1. What is multithreading in Javascript?
Ans. 
Multithreading is not natively supported in JavaScript, but can be achieved through Web Workers.
• JavaScript is a single-threaded language, meaning it can only execute one task at a time.

• Web Workers allow for multithreading in JavaScript by running scripts in the background.

• Web Workers can communicate with the main thread using message passing.

• Examples of tasks that can benefit from multithreading include heavy computati
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Q2. A situation-based question on React.js regarding listing data on a page from an API.
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Q3. Questions on setInterval() and setTimeout()
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Q4. Question on how DOM manipulation works in React.js
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Q5. What is virtual DOM?
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Virtual DOM is a lightweight copy of the actual DOM used for efficient updates.
• Virtual DOM is a concept used in modern web development frameworks like React.

• It is a lightweight copy of the actual DOM that is used to track changes and update the actual DOM efficiently.

• When a change is made to the virtual DOM, it is compared with the previous version to identify the minimum number of changes required to update the actual...read more
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Q6. Easy questions on Node.js event loop.
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