Infosys Fullstack Java Application Developer Interview Questions and Answers

Round duration - 30 Minutes
Round difficulty - Easy

There were two questions one from arrays and other one from linked list.

Q1. 
Longest Switching Subarray Problem Statement
You are provided with an array 'ARR' consisting of 'N' positive integers. Your task is to determine the length of the longest contiguous subarray that is switc...read more
Ans. 
Find the length of the longest contiguous subarray where elements at even indices are equal and elements at odd indices are equal.
• Iterate through the array and keep track of the length of the current switching subarray.

• Update the length when the switching condition is broken.

• Return the maximum length found for each test case.
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Q2. 
Cycle Detection in a Singly Linked List
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's next points back to a previous node in the ...read more
Ans. 
Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.
• Use Floyd's Cycle Detection Algorithm to determine if there is a cycle in the linked list.

• Maintain two pointers, one moving at twice the speed of the other, if they meet at some point, there is a cycle.

• If one of the pointers reaches the end of the list (null), there is no cycle.
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Round duration - 30 Minutes
Round difficulty - Easy

The interviewer was quite friendly. Asked general HR questions .

Round duration - 90 minutes
Round difficulty - Medium

CodeVita: CodeVita is an online coding contest that is conducted by TCS every year across the whole world for coders to showcase their programming skills. There are three rounds in CodeVita:

Pre Qualifier: Conducted Online
Qualifier: Conducted Online
Grand Finale: Conducted in India (offline) in TCS centers
In the Pre Qualifier round, there are 6 questions, and if you are able to solve at least 1 question and clear it’s all the test cases, there is a chance that you will get an interview call from TCS. For the safe side try to solve 2 questions or more completely.

Q1. 
Delete Alternate Nodes from a Singly Linked List
Given a Singly Linked List of integers, remove all the alternate nodes from the list.
Input:
The first and the only line of input will contain the elemen...read more
Ans. 
Remove alternate nodes from a singly linked list of integers.
• Traverse the linked list and skip every alternate node while connecting the previous node to the next node.

• Update the next pointers accordingly to remove the alternate nodes.

• Ensure to handle edge cases like empty list or list with only one node.
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Q2. 
Find All Pairs Adding Up to Target
Given an array of integers ARR of length N and an integer Target, your task is to return all pairs of elements such that they add up to the Target.
Input:
The first line ...read more
Ans. 
Given an array of integers and a target, find all pairs of elements that add up to the target.
• Iterate through the array and for each element, check if the target minus the element exists in a hash set.

• If it exists, add the pair to the result. If not, add the element to the hash set.

• Handle cases where the same element is used twice in a pair.

• Return (-1, -1) if no pair is found.
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Round duration - 60 minutes
Round difficulty - Easy

We were informed by the TCS a day before the interview about the time of our interview and all. As this year the whole process was online so a bunch of instructions was mentioned by TCS like the internet connectivity, important documents to present, and all. I joined the virtual lobby on time and my slot was from 3:30 PM to 6:30 PM, there were a few more candidates in the virtual lobby, and a lady started to speak. I was the first to give the interview and all other candidates were given different slots by that lady for their interviews.

Q1. Can you tell me something about yourself and describe the approaches you used to solve the problems in the contest?
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Round duration - 90 minutes
Round difficulty - Easy

This interview directly started with questions.

 

Q1. How has the COVID-19 pandemic affected the IT industry?
Ans. 
The COVID-19 pandemic has significantly impacted the IT industry, leading to remote work, increased demand for digital solutions, and delays in projects.
• Transition to remote work for many IT companies

• Increased demand for digital solutions such as online collaboration tools, e-commerce platforms, and telehealth services

• Delays in projects due to disruptions in supply chains and workforce availability

• Shift towards cloud c...read more
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Q2. What is the contribution of the TATA group towards the betterment of our nation?
Ans. 
TATA group has made significant contributions to the nation through various industries and philanthropic initiatives.
• TATA Steel is one of the largest steel producers in India, contributing to infrastructure development.

• TATA Motors is a leading automobile manufacturer, driving innovation in the automotive sector.

• TATA Consultancy Services (TCS) is a global IT services company, creating job opportunities and boosting the ...read more
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Round duration - 90 minutes
Round difficulty - Easy

First, she introduced herself and then asked me to give my introduction. Then she asked behavorial and general questions.
 

Q1. What are your salary expectations?
Ans. 
I am open to discussing salary based on the responsibilities and opportunities offered by the position.
• I am flexible and open to negotiation.

• I am looking for a competitive salary that reflects my skills and experience.

• I am more interested in the overall compensation package, including benefits and growth opportunities.

• I would like to learn more about the company's salary range for this position.

• I am confident that we c
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Q2. What is your family background?
Ans. 
My family background is diverse and multicultural.
• My parents are from different countries, which has exposed me to different cultures and perspectives.

• I have relatives who work in various industries, including technology and healthcare.

• Growing up, my family encouraged me to pursue my interests in computer science and supported my education in the field.
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Q3. Share details of your previous job.
Ans. 
I worked as a Software Developer at XYZ Company.
• Developed and maintained software applications using Java and Python.

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

• Participated in code reviews and debugging sessions to ensure high-quality code.

• Worked closely with clients to gather requirements and provide technical support.

• Implemented unit tests and performed software testing to identify an...read more
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Q4. Why should we hire you?
Ans. 
I have a strong background in software development and a proven track record of delivering high-quality projects on time and within budget.
• I have a deep understanding of various programming languages and frameworks, allowing me to adapt quickly to new technologies.

• I am highly skilled in problem-solving and troubleshooting, which enables me to identify and resolve issues efficiently.

• I am a team player and have excellent...read more
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Q5. Why are you looking for a change?
Ans. 
Looking for new challenges and growth opportunities.
• Seeking a more challenging role to enhance my skills and knowledge.

• Interested in working on cutting-edge technologies and projects.

• Want to be part of a dynamic and innovative team.

• Desire to expand my professional network and learn from industry experts.
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Q6. Where do you see yourself in 5 years?
Ans. 
In 5 years, I see myself as a senior software developer leading a team and working on complex projects.
• Leading a team of developers

• Working on complex projects

• Continuously learning and staying updated with new technologies

• Contributing to the growth and success of the company
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Q7. What are your strengths and weaknesses?
Ans. 
My strengths include problem-solving, attention to detail, and teamwork. My weaknesses include time management and public speaking.
• Strengths: problem-solving, attention to detail, teamwork

• Weaknesses: time management, public speaking
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Q8. Tell me about yourself.
Ans. 
I am a software developer with experience in various programming languages and a passion for creating innovative solutions.
• Experienced in Java, C++, and Python

• Developed a mobile app using React Native

• Worked on a team to create a web application using Angular

• Strong problem-solving and analytical skills
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Q9. Tell me about yourself
Ans. 
I am a software developer with experience in web development and a passion for problem-solving.
• Experienced in web development using HTML, CSS, and JavaScript

• Proficient in programming languages such as Java and Python

• Familiar with frameworks like React and Angular

• Strong problem-solving and analytical skills

• Excellent teamwork and communication abilities
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Q10. What are your strength and weakness
Ans. 
My strength is problem-solving and my weakness is sometimes overthinking.
• Strength: Problem-solving

• Weakness: Overthinking
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Q11. Where do you see yourself in 5 year's
Ans. 
In 5 years, I see myself as a senior software developer leading a team and working on complex projects.
• Leading a team of developers

• Working on complex projects

• Continuously learning and improving my skills

• Contributing to the growth and success of the company
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Q12. Why are you looking for a change
Ans. 
Seeking new opportunities for professional growth and challenges.
• Looking for a more challenging role

• Want to expand my skill set

• Seeking better career prospects

• Interested in working with new technologies

• Want to work in a more collaborative environment
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Q13. I think I am very flexible and adaptive to learning new things
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Q14. Share your details for your previous job
Ans. 
I worked as a Software Developer at XYZ Company.
• Developed and maintained web applications using Java and Spring framework

• Collaborated with cross-functional teams to gather requirements and design solutions

• Implemented unit tests and performed code reviews to ensure code quality

• Participated in Agile development process and attended daily stand-up meetings

• Troubleshooted and resolved software defects reported by users
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Q15. What is your family background
Ans. 
My family background is diverse and multicultural, with members from different professions and cultural backgrounds.
• My father is a doctor and my mother is a teacher.

• I have two siblings, one is an engineer and the other is a lawyer.

• We celebrate various cultural festivals and traditions together.

• My family values education and encourages continuous learning.
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Q16. What are your salary expectations
Ans. 
I am open to discussing salary based on the responsibilities and opportunities offered by the position.
• I am flexible and open to negotiation.

• I am looking for a fair and competitive salary based on my skills and experience.

• I am more interested in the overall compensation package, including benefits and growth opportunities.

• I am confident that we can come to a mutually beneficial agreement.
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