TCS Javascript Developer Interview Questions and Answers

Q1. Why should we hire you?
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Exam used to determine an individual's skill or propensity to succeed in a given activity

Q1. An interview to assess your technical ability for the role, and the depth and breadth of your knowledge in your chosen field.
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Q2. Coding, Data analysis, etc. Technical interviews differentiate from general interviews and focus solely on the technical skills of the candidates.
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Q1. What is Promise in JS?
Ans. 
Promise in JS is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() method to handle success and failure cases.

• Example: new Promise((resolve, reject) => { ... }).then(result => { ... }).catch(error => { ... });
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Q2. What is Call back?
Ans. 
A callback is a function passed as an argument to another function to be executed later.
• Callback functions are commonly used in asynchronous programming to handle responses or events.

• Callbacks can be synchronous or asynchronous.

• Example: setTimeout function in JavaScript takes a callback function as an argument to be executed after a specified time.
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Q1. Share details of your previous job.
Ans. 
I worked as a Javascript Developer at XYZ Company.
• Developed and maintained web applications using Javascript, HTML, and CSS.

• Collaborated with a team of developers to implement new features and fix bugs.

• Optimized code for performance and scalability.

• Worked on integrating APIs and third-party libraries.

• Participated in code reviews and provided feedback to improve code quality.
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Q2. What are your strengths and weaknesses?
Ans. 
My strengths include problem-solving, attention to detail, and collaboration. My weaknesses include time management and public speaking.
• Strengths: problem-solving, attention to detail, collaboration

• Weaknesses: time management, public speaking
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Q3. Why are you looking for a change?
Ans. 
Looking for new challenges and growth opportunities in a dynamic and innovative environment.
• Seeking a change to expand my skill set and work on more complex projects.

• Interested in joining a company that values creativity and encourages learning.

• Want to be part of a team that fosters collaboration and innovation.

• Desire to work in a fast-paced and evolving industry.

• Looking for a change to improve work-life balance and ex
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Q4. Where do you see yourself in 5 years?
Ans. 
In 5 years, I see myself as a senior Javascript developer, leading a team and working on complex projects.
• Becoming a senior Javascript developer

• Leading a team

• Working on complex projects
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Q5. Tell me about yourself.
Ans. 
I am a passionate Javascript developer with experience in building web applications.
• I have a strong understanding of core Javascript concepts and frameworks like React and Node.js.

• I have worked on various projects, including e-commerce websites and interactive web applications.

• I am skilled in writing clean and efficient code, and I enjoy solving complex problems.

• I am constantly learning and keeping up with the latest t...read more
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B.tech

Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
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Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.