TCS

TCS Interview Preparation

Preparing for an interview at TCS requires a solid understanding of core computer science fundamentals, along with specialized knowledge relevant to their specific domain and engineering culture.

System Design Focus

For system design rounds at TCS, you should be prepared to discuss architectures that can handle their specific scale and product requirements. Practice explaining why each component belongs in your design and the trade-offs involved.

Here are previously asked system design questions to help you practice specifically for TCS:

• Design an enterprise banking transaction processing system.
• Design a scalable legacy mainframe integration layer.
• Design a global IT support ticketing and resolution system.
• Design an automated employee onboarding and provisioning portal.
• Design a robust supply chain inventory management platform.
• Design a real-time fraud detection engine for digital payments.
• Design a cloud cost management and governance dashboard.
• Design an enterprise role-based access control (RBAC) service.
• Design a highly available secure API gateway for enterprise clients.
• Design a centralized logging and observability platform.
• Design a document management system with full-text search.
• Design a distributed rate limiter for internal microservices.
• Design an asynchronous batch processing system for end-of-day reports.
• Design an offline-capable mobile app for logistics tracking.
• Design a system to sync on-premise Active Directory with Cloud IAM.

General Preparation Advice

• Coding & Algorithms: Ensure your foundation in data structures (Arrays, Strings, Hash Maps, Trees, Graphs) is solid. Practice writing solutions out loud so your reasoning is visible while you code.
• Behavioral: Prepare short STAR stories that show ownership, collaboration, debugging, conflict resolution, learning, and measurable impact. Keep the examples specific and tied to real decisions you made.