Ksolves India Limited 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
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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

Q1. Solid Principle, Design Patterns,
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Q2. React sharing data btw siblings without any state management.
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Q3. NodeJs is single threaded then why it feels concurrent?
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Q1. Questions related micro services
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Q2. Message queue related questions
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Q3. NodeJs related questions: Event loop
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Q1. Tell us about your experience.
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Q2. In english, give me a feedback you received lately.
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Q1. Brief explanation of SOLID principles
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Q2. Ref vs out arguments
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Q1. Print Longest Increasing Subsequence
Ans. 
Print the longest increasing subsequence of an array of strings.
• Use dynamic programming to find the longest increasing subsequence.

• Iterate through the array and keep track of the longest increasing subsequence ending at each index.

• Return the longest increasing subsequence found.
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Q1. What is solid principple
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SOLID is a set of five design principles that help make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses with...read more
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Q2. Whats are oops in c#
Ans. 
Object-oriented programming concepts in C#
• Encapsulation: bundling data and methods that operate on the data into a single unit

• Inheritance: allows a class to inherit properties and behavior from another class

• Polymorphism: ability for objects to take on multiple forms

• Abstraction: hiding the complex implementation details and showing only the necessary features
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Aptitude,reasoning,verbal,C language,Java,C++

Q1. What is interface in JAVA
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Q2. Explain OOPS in JAVA
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C,c++,java ,SQL, javascript and python