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Preparing for a technical interview in Data Analyst, SQL & Power BI? Below are the most frequently asked 2026 technical, scenario-based, and architecture interview questions asked at TCS, Accenture, Infosys, Deloitte, Amazon, Wipro, HCL, and product startups.
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Hiring Manager Tip: Interviewers test whether you have hands-on lab experience or only theoretical knowledge. Explain the end-to-end data/code flow, edge cases, performance optimization, and testing strategy you implemented in your capstone project.
Model Answer: Modern teams integrate AI assistants for automated boilerplate generation, unit test coverage, anomaly detection, and documentation while engineers focus on security, scalability, and business logic validation.
Model Answer: Discuss log aggregation, root cause analysis (RCA), latency profiling, memory/query optimization, and rollback pipelines practiced in 4Achievers workstation labs.