Antino Reactjs Developer Interview Questions and Answers

Q1. What is your expected CTC
Ans. 
My expected CTC is based on my experience, skills, and the market rate for Reactjs Developers.
• My expected CTC is in line with industry standards for Reactjs Developers.

• I have considered my level of experience and expertise in Reactjs development.

• I am open to negotiation based on the overall compensation package offered by the company.
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Q2. What version of React you use?
Ans. 
I use the latest stable version of React for my projects.
• I always make sure to update to the latest stable version to take advantage of new features and improvements.

• For example, I am currently using React version 17.0.2 in my projects.

• I also keep an eye on the React release notes to stay informed about any breaking changes or deprecations.
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Q1. What is reconcilation in ReactJs
Ans. 
Reconciliation in ReactJs is the process of updating the DOM to match the virtual DOM after a state change.
• Reconciliation is the algorithm that React uses to update the UI efficiently.

• It compares the virtual DOM with the previous virtual DOM and only updates the necessary components.

• Reconciliation is a key feature that helps React achieve high performance.

• Example: When a user clicks a button causing a state change, Rea...read more
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Q2. How does Virtual DOM work
Ans. 
Virtual DOM is a lightweight copy of the actual DOM that React uses to efficiently update the UI.
• Virtual DOM is a representation of the actual DOM in memory.

• When state changes, React compares the Virtual DOM with the actual DOM to identify the differences.

• React then updates only the necessary parts of the actual DOM, minimizing performance impact.
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Form builder basically similar to Google forms

It was mixed like aptitude and from technical.

Q1. It was F2F round. Where technical questions were asked.
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Q1. Managerial round. It includes technical and managerial both
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Q1. HR round. It includes all the HR level questions
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Coding cum aptitude test on Hackerrank

Q1. First round interview . Consisted questions based on projects , dsa
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Q1. Round 2 . Question based from core technology. Micro services , etc
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Q1. Basic hr questions . Why are you fit for this role kind of things
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Written test on Basics of c and c++ is asked.
Also be thorough with mathematical topics like vectors,calculus.

Q1. C++ basic questions Oops concepts
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Q2. Math questions on vectors and calculus Predict the output for a given program
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Q1. Find repeated nos in arrays
Ans. 
Find repeated numbers in arrays of strings
• Iterate through each string in the array

• Convert each string to an array of numbers

• Use a hash map to track the frequency of each number

• Identify and return the repeated numbers
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Q1. Current company work, reason for change, etc.
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Q1. Project based backend and frontend
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Q2. How to connect to backend
Ans. 
To connect to the backend, you can use APIs, database connections, or web services.
• Use APIs to send and receive data between the frontend and backend

• Establish database connections to retrieve and store data

• Utilize web services for communication between different systems
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It was an aptitude test consisting of 40 questions in 30 minutes.

There were coding questions
1.) Find the sum of 4 largest no in an array.
2.)find area of the largest rectangle in a histogram.
3.)Sudoko challenge