Infosys Senior Angular 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.