TCS
Large multinational IT services and consulting enterprise based in India.
3 Rounds
~14 Days
Medium
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Data Engineer
•
Coding
•
medium
Write a Python generator function to read a 50GB CSV file chunk by chunk to prevent Out-Of-Memory (OOM) errors.
#Python
#Memory Management
#Generators
Data Engineer
•
Coding
•
medium
Write a Python decorator that calculates and logs the execution time of any data transformation function it is applied to.
#Python
#Decorators
#Logging
Data Scientist
•
Coding
•
medium
Write a Pandas code snippet to fill missing values in a 'Sales' column with the rolling 7-day average of that specific store.
#Pandas
#Data Imputation
#Time Series
Data Scientist
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Coding
•
medium
Write a Python function to merge two overlapping Pandas DataFrames based on a common ID, keeping only the updated values from the second DataFrame.
#Pandas
#Data Manipulation
Data Scientist
•
Coding
•
easy
Write a Python program to extract all valid email addresses from a given large text file.
#Regex
#String Parsing
Data Scientist
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Technical
•
medium
How would you optimize a Pandas script that is currently taking 2 hours to process 10 million rows of data?
#Optimization
#Pandas
#Big Data
Machine Learning Engineer
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Coding
•
medium
Implement a custom F1-score calculation function from scratch using pure Python and NumPy, without using scikit-learn.
#Python
#NumPy
#Evaluation Metrics
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.