TCS Senior Front end Developer Interview Questions and Answers

Q1. What are states and props in React?
Ans. 
States and props are important concepts in React for managing and passing data between components.
• States are mutable data that can be changed within a component

• Props are read-only data passed from parent to child components

• States are managed within a component using setState() method

• Props are accessed using this.props in a component
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Q2. What is Virtual DOM
Ans. 
Virtual DOM is a lightweight copy of the actual DOM that allows for efficient updates and rendering in web applications.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing direct manipulation of the actual DOM.

• When changes are made to the virtual DOM, a comparison is done with the actual DOM to determine the minimal updates needed for rendering.

• This process helps reduce the numbe...read more
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Q3. Build a fetch and filter component
Ans. 
A fetch and filter component for data retrieval and manipulation
• Use fetch API to retrieve data from an API endpoint

• Implement a filter function to manipulate the retrieved data based on user input

• Display the filtered data in the UI
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Javascript and React snippets

Q1. Interviewer asked about depth in React Js and JavaScript. JavaScript questions - Hoisting, implementation of closure, difference between call, bind & apply. Logic implementation of suggestions list in sea...read more
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Q1. He asked about both technical and non technical related questions. Previous organisation works. What i have faced difficult y in previous organisation. And some scenario based questions.
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Q1. Basic components communication
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Q2. Forms based questions
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Q1. How are you doing?
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Q2. What do you do in your life?
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Q1. No problem with this
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Q2. The only way you could be
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First round is online assessment. Where we have multiple choice questions related to angular, css. Html, javascript

Q1. AOT. JIT compilers, Pipes, Services, Singleton component
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Q2. Have you developed website for physically challenged ppl, accessibility
Ans. 
Yes, I have experience developing websites for physically challenged individuals with a focus on accessibility.
• Implemented keyboard navigation for users with mobility impairments

• Utilized ARIA roles and attributes to improve screen reader compatibility

• Ensured color contrast and text size met WCAG standards

• Tested websites with assistive technologies like screen readers and voice recognition software
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Q1. General intro to the hr person
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Q1. JS related questions
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Q1. JS related questions
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Q1. JS related questions
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