Tcs Interview Questions (3+ Questions)
Last Updated: June 8, 2026 • 3 Questions • Real Company Interviews
Prepare for your Tcs interview with our comprehensive collection of 3+ real interview questions and detailed answers. These questions have been curated from actual Tcs technical interviews across various roles including DevOps Engineer, Data Engineer, QA Engineer, and more.
Table of Contents
- Debug SSH Lockout (medium)
- Overall System Downtime Aggregation (medium) 🔒
- Store Performance Comparison (easy) 🔒
Our Tcs interview questions cover a wide range of technical topics and difficulty levels, from entry-level positions to senior roles. Each question includes detailed explanations and answers to help you understand the concepts and prepare effectively for your interview.
💡 Pro Tips for Tcs Interviews
- Practice each question and understand the underlying concepts
- Review Tcs's specific technologies and methodologies
- Prepare follow-up questions and edge cases
- Practice explaining your solutions clearly and concisely
Interview Questions & Answers
1. Debug SSH Lockout
Resolve SSH authentication lockouts caused by exceeding MaxAuthTries limits. Learn how to search authentication logs for failed SSH attempts, count login failures to determine the threshold exceeded, modify /etc/ssh/sshd_config to increase MaxAuthTries, and restart the SSH service to apply changes. This guide covers analyzing /var/log/auth.log for failure patterns, understanding SSH daemon authentication limits, and balancing security with legitimate retry scenarios. Essential for troubleshooting locked-out accounts, debugging CI/CD deployment failures, and maintaining SSH accessibility during key rotation events.
2. Overall System Downtime Aggregation
Objective
You are provided with a maintenance_logs table that records system maintenance activities. Each record includes a unique identifier, the start and end times of the maintenance, and the reason for the downtime. Your task is to write an SQL query that calculates the total downtime in ...
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Detailed explanation and solution available for premium members.
3. Store Performance Comparison
Objective
Write a SQL query that calculates the revenue per square foot for each store and the total revenue. The results should be ordered by revenue per square foot in descending order.
Additional Information
- The query should join the
storesandsalestables onstore_id. - The rev...
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Detailed explanation and solution available for premium members.
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