Experience Level
3-5 Years
Real interview questions with expert answers, plain-English explanations, and practical examples. (200 questions)
Tech Mahindra
Mobile Developer
Performance Optimization
How do you optimize a mobile app for performance and battery life?
Infosys
AI Engineer
Machine Learning
How would you handle class imbalance in a fraud detection model?
Google
Data Engineer
Databases
What’s the difference between OLTP and OLAP, and how does that affect schema design?
Amazon
SRE
Networking
How would you debug a service that intermittently times out under load?
Deloitte
Security Engineer
Security
What’s the difference between authentication and authorization, and how does OAuth 2.0 fit in?
Accenture
Full Stack Developer
System Design
How would you design a URL shortener service?
Google
SRE
Monitoring
What are the four golden signals of monitoring, and how would you set up alerting around them?
Microsoft
Cloud Engineer
Cloud Infrastructure
What happens when Terraform’s state drifts from real infrastructure, and how do you design around it?
Honeywell
DevOps Engineer
CI/CD
How would you design a CI/CD pipeline for a microservices application?
Google
DevOps Engineer
Docker