Recrosoft Technologies Interview Questions and Answers

Q1. What are Hooks?
Ans. 
Hooks are functions that allow you to use state and other React features without writing a class.
• Hooks were introduced in React 16.8

• They allow you to reuse stateful logic

• useState is a hook that allows you to add state to a functional component

• useEffect is a hook that allows you to perform side effects in a functional component

• useContext is a hook that allows you to consume a context in a functional component
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Q2. What is the 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 optimize expensive computations by caching the result and returning it if the inputs are the same.

• useCallback is used to optimize expensive function creation by caching the function and returning it if the inputs are the same.

• useMemo returns a value while useCallback returns a memoized function.

• useMemo is used for memo...read more
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Q3. What is Call, apply , bind
Ans. 
Call, apply, and bind are methods used to manipulate the value of 'this' in JavaScript functions.
• Call and apply are used to invoke a function with a specific 'this' value and arguments passed as an array or list respectively.

• Bind returns a new function with a specific 'this' value and any arguments passed as a list.

• Example: myFunction.call(thisValue, arg1, arg2); myFunction.apply(thisValue, [arg1, arg2]); myFunction.bi...read more
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Q4. What is the CSS box model
Ans. 
The CSS box model is a design concept that describes how elements are displayed on a web page.
• It consists of content, padding, border, and margin.

• The content is the actual element and its size is determined by width and height properties.

• Padding is the space between the content and the border.

• Border is the line that surrounds the content and padding.

• Margin is the space between the border and the next element.

• The box mo...read more
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Q5. Write a code to explain Closures.
Ans. 
Closures are functions that have access to variables in their outer scope, even after the outer function has returned.
• Closures are created when a function is defined inside another function.

• The inner function has access to the outer function's variables, even after the outer function has returned.

• Closures can be used to create private variables and methods in JavaScript.

• Example: function outer() { var x = 10; function ...read more
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One medium algorithm question was asked.

Q1. Questions related react js, javascript
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The case study Involves 1 Questions which was easy like How you will do hiring for 100 candidates for IT in specific time. Strategies, your approach will be considered

Q1. Completely Technical Discussion. Roles you have hired , which position closed, time to hire ,Boolean search , LinkedIn Sourcing. Super easy if you are Technically prepared
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Q1. This round was also involves same Question but the panel didn't went much deep she took general overview of My recruitment process . Super easy not much technical
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Q1. It was normal Discussion Why Recruitment What u know about Recro. Why u wanna Join Recro. Family Background Normal discussion. Chill Round
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Q1. Basic relevant Resume Based Questions About Tech and Project
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Q2. When you gonna join ?
Ans. 
I am available to join immediately.
• I can start as soon as possible.

• I am ready to join your team.

• I can begin working right away.
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Hackerearth Test Quiz + DSA Based + Quiz Based on the nodejs,es6,js,etc