Tata 1mg Software Engineer Interview Questions India 2026

Tata 1mg technical interview FAQ

01What is the recruitment process at Tata 1mg?

The typical Tata 1mg recruitment process has 6 stages: Apply via 1mg careers portal, LinkedIn, or Instahyre → Recruiter call to verify basics and align on role and compensation band → Proctored online test: coding problems plus CS MCQs (90 minutes) → Machine coding round (90 minutes, take-home or live) → Two technical interview rounds covering DSA, system design, and project discussion → HR round and offer letter.

02What are the interview rounds at Tata 1mg?

Tata 1mg typically conducts 5 interview rounds: Round 1 - Online Test (90 min): 2 to 3 medium-hard DSA problems and 20 to 30 MCQs on OS, DBMS, and networking.; Round 2 - Machine Coding (90 min): Build a working module (for example, a medicine search or cart service) with clean, testable code.; Round 3 - Technical Interview 1 (60 min): DSA problem-solving live, OOP concepts, and code walkthrough of your machine coding submission.; Round 4 - System Design (60 min, SDE-2 and above): Design a pharmacy order-fulfilment or real-time inventory system; covers microservices, caching, and consistency.; Round 5 - HR Round (30 min): Culture, joining timeline, and compensation negotiation..

03What framework should I use for Tata 1mg technical interviews?

HireStepX recommends the SCALE framework for this type of interview: Scope the problem, Choose data structures, Algorithm design, Look at trade-offs, Edge cases and testing

04Reverse a linked list in O(1) extra space. Then explain when you'd use this in production.

To answer this question well, HireStepX recommends the SCALE approach: Scope the problem, Choose data structures, Algorithm design, Look at trade-offs, Edge cases and testing Ground your answer in a specific real example from your own experience.

05What is the difference between a class and an object? Give an example.

To answer this question well, HireStepX recommends the SCALE approach: Scope the problem, Choose data structures, Algorithm design, Look at trade-offs, Edge cases and testing Ground your answer in a specific real example from your own experience.

06Write a SQL query to find the second-highest salary in a department.

To answer this question well, HireStepX recommends the SCALE approach: Scope the problem, Choose data structures, Algorithm design, Look at trade-offs, Edge cases and testing Ground your answer in a specific real example from your own experience.

07What is normalisation in databases? When would you de-normalise?

To answer this question well, HireStepX recommends the SCALE approach: Scope the problem, Choose data structures, Algorithm design, Look at trade-offs, Edge cases and testing Ground your answer in a specific real example from your own experience.

08What's the difference between a stack and a queue? Give a real-world use case for each.

To answer this question well, HireStepX recommends the SCALE approach: Scope the problem, Choose data structures, Algorithm design, Look at trade-offs, Edge cases and testing Ground your answer in a specific real example from your own experience.