Tata Consultancy Services (TCS) interview experience Real time questions & tips from candidates to crack your interview
System Engineer
Tata Consultancy Services (TCS)
2 rounds | 4 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 6 Months
Topics: Data Structures, Algorithms, OOPS, DBMS, OS, System Design
Tip 1 : Do lots of competitive programming
Tip 2 : Practice more using coding platform like LeetCode or CodeChef.
Tip 3 : Focus more on time and space complexities and explore different ways to solve problem.
Application process
Where: Company Website
Eligibility: 7 CGPA, good in programming/DSA
Tip 1 : Put some impactful projects in your resume.
Tip 2 : Do not put false things and over skills in your resume.
Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 Minutes
Interview date27 Nov 2019
Coding problem2
Timing-60 minutes is the Duration Of Assessment
you need to give the test within 5 days of getting the test mail.
Test is conducted virtually through TCS platform. Test covers DSA, OOPS concept, DBMS, SQL, Programming and some general question related to Leadership Principles and workstyles.
1. Pascal's Triangle
Easy
20m average time
80% success
0/40
Asked in companies
You are given an integer N. Your task is to return a 2-D ArrayList containing the pascal’s triangle till the row N.
A Pascal's triangle is a triangular array constructed by summing adjacent elements in preceding rows. Pascal's triangle contains the values of the binomial coefficient. For example in the figure below.
For example, given integer N= 4 then you have to print.
1
1 1
1 2 1
1 3 3 1
Here for the third row, you will see that the second element is the summation of the above two-row elements i.e. 2=1+1, and similarly for row three 3 = 1+2 and 3 = 1+2.
Problem approach
Approach-
Pick last row of res-> [1]
add [0] in the starting or ending -> [0,1,0]
add 2 value from temp-> 0+1=1, 1+0=1 => [1,1]
append in row[] -> [1,1]
append row in res -> [[1],[1,1]]
return res
Solution-
res=[[1]]
for i in range(numRows-1):
temp=[0]+res[-1]+[0]
row=[]
for j in range(len(res[-1])+1):
row.append(temp[j]+temp[j+1])
res.append(row)
return res
2. DBMS based questions
we need to answer questions related to DBMS, SQL, programming, OOPS concept, Leadership Principles, candidate behavior questions and workstyles.
For Example-
What is relational and non relational database?
What is sql and no-sql?
What is DDL, DML and also explain its types?
Do you agree with your seniors whether that guy is correct or not.
Are you open to learn new technology or still want to work on those technologies on which you are familiar.
02
Round
Medium
Face to Face
Duration60 Minutes
Interview date4 Dec 2019
Coding problem2
We need to solve 1 or 2(based on interviewer) coding question within 1 hour in which we need to explain our approach before writing the code and we need to give optimal solution of the approach.
Interviewer also ask some other question related to DBMS, SQL, OOPS concept and etc.
1. Zigzag Binary Tree Traversal
Easy
10m average time
90% success
0/40
Asked in companies
You are given a ‘Binary Tree’.
Return the level-order traversal of the Binary Tree.
Example:
Input: Consider the following Binary Tree:
Output:
Following is the level-order traversal of the given Binary Tree: [1, 2, 3, 5, 6, 4]
Problem approach
Solution in Python:-
class Solution:
def zigzagLevelOrder(self, root: Optional[TreeNode]) -> List[List[int]]:
if root is None:
return []
s1=[root]
s2=[]
level=[]
res=[]
while s1 != [] or s2 !=[]:
while s1:
root=s1.pop()
level.append(root.val)
if root.left is not None:
s2.append(root.left)
if root.right is not None:
s2.append(root.right)
res.append(level)
level=[]
while s2:
root=s2.pop()
level.append(root.val)
if root.right is not None:
s1.append(root.right)
if root.left is not None:
s1.append(root.left)
if level != []:
res.append(level)
level=[]
return res
2. DBMS Questions
we need to answer questions related to DBMS, SQL, programming, OOPS concept, Leadership Principles, candidate behavior questions and workstyles.
For Example-
Difference between relational and non relational database?
What is foreign key in SQL queries?
What is the output of given program?
What is OPPS concept and its types?
Difference between function overloading and function overriding?
Write a query to find out second highest salary of an employee.
Do you agree with your seniors whether that guy is correct or not.
Are you open to learn new technology or still want to work on those technologies on which you are familiar.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
To make an AI less repetitive in a long paragraph, you should increase:
Choose another skill to practice
Similar interview experiences
System Engineer
3 rounds | 5 problems
Interviewed by Tata Consultancy Services (TCS)
Selected 
0 views
0 comments
0 upvotes
System Engineer
4 rounds | 10 problems
Interviewed by Tata Consultancy Services (TCS)
Selected 1000 views
0 comments
0 upvotes
System Engineer
2 rounds | 2 problems
Interviewed by Tata Consultancy Services (TCS)
Selected 2957 views
0 comments
0 upvotes
System Engineer
2 rounds | 2 problems
Interviewed by Tata Consultancy Services (TCS)
Rejected
330 views
0 comments
0 upvotes
Companies with similar interview experiences
System Engineer
2 rounds | 2 problems
Interviewed by Cognizant
Selected 4965 views
5 comments
0 upvotes
System Engineer
2 rounds | 4 problems
Interviewed by HCL Technologies
Selected 1370 views
0 comments
0 upvotes
System Engineer
2 rounds | 3 problems
Interviewed by Accenture
Rejected
907 views
0 comments
0 upvotes