Tata Consultancy Services (TCS) interview experience Real time questions & tips from candidates to crack your interview
Software Developer
Tata Consultancy Services (TCS)
2 rounds | 2 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 3 months
Topics: Data Structures, OOPS, Algorithms, Quantitative Aptitude, Logical Reasoning, Verbal Ability
Tip 1 : Practice as many questions as you can
Tip 2 : Practice variety of questions from different topics
Tip 3 : Try to solve more of intermediate and hard difficulty level questions and dont waste time on easy questions
Application process
Where: Campus
Eligibility: Above 6.5 CGPA and not more than one backlog ( which will have to be cleared before joining TCS)
Tip 1 : Have some projects on your resume
Tip 2 : Make your resume specific to the role you are applying for
Interview rounds
01
Round
Medium
Online Coding Interview
Duration180 minutes
Interview date9 Oct 2020
Coding problem1
This round was online and take from home. The timings were in the day itself with 3 windows of 3 hours each. We could login in any of those specified time windows. The entire test was 180 mins duration consisting of MCQ sections of Quantitative Aptitude, Logical Reasoning and Verbal Ability. Also, it consisted of Programming Fundamentals MCQ section and advanced coding section at the end with two coding questions.
1. Binary Tree Zigzag Traversal
Easy
15m average time
85% success
0/40
Asked in companies
You have been given a Binary Tree of 'N' nodes, where the nodes have integer values. Your task is to print the zigzag traversal of the given tree.
Note:
In zigzag order, level 1 is printed from left to right fashion, level 2 is printed from right to left. and level 3 is printed from left to right again, and so on…..
For example:
For the given binary tree
The zigzag traversal is [1, 4, 3, 5, 2, 7, 6]
Problem approach
1. I used a queue for level order traversal
2. I declared a flag variable to keep track of the alternate level to reverse the order of the corresponding level.
3. If flag = true, it means the elements have to be inserted from left to right in the arraylist or else if flag = false, it means the elements have to be inserted from right to left in the arraylist.
02
Round
Medium
Video Call
Duration40 minutes
Interview date23 Oct 2020
Coding problem1
This was the interview round which consisted of two sub rounds : technical and HR round. It was conducted on Google Meet video conference call online. The questions asked in the technical interview were about my introduction and my projects mentioned in my resume. Also, the asked few coding questions of string manipulation on Java and OOPs concepts. The technical round went very well and the interviewer was satisfied with my answers. In the HR round, the questions were related to cultural fit and location and relocation preferences. After few weeks of the interview, I got a job offer stating that I have been selected for the role of Software Developer at TCS.
1. Reverse the String
Easy
15m average time
85% success
0/40
Asked in companies
You are given a string 'STR'. The string contains [a-z] [A-Z] [0-9] [special characters]. You have to find the reverse of the string.
For example:
If the given string is: STR = "abcde". You have to print the string "edcba".
follow up:
Try to solve the problem in O(1) space complexity.
Problem approach
1. The idea is to traverse the length of the string
2. Extract each character while traversing
3. Add each character in front of the existing string
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
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