Experience Level
3-5 Years
Real interview questions with expert answers, plain-English explanations, and practical examples. (200 questions)
Oracle
Backend Developer
Networking
How does the TCP/IP model enable reliable data transmission from a backend service to a client, and which layers are most critical for a developer to optimize?
Intuit
Security Engineer
Authentication & Authorization
How do Single Sign-On (SSO) systems work, and what are the security considerations for implementing one?
Oracle
Backend Developer
Data Structures & Algorithms
When would you prefer a dynamic array (like ArrayList) over a linked list for storing data in a backend service, and what are the memory and performance implications?
Mphasis
QA Engineer
Testing
How would you design a comprehensive test automation strategy for a complex web application?
LTIMindtree
DevOps Engineer
CI/CD
How do you ensure the security of a CI/CD pipeline, and what are the common vulnerabilities?
PayPal
Security Engineer
Authentication & Authorization
How do Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC) differ, and when would you choose one over the other?
ServiceNow
Backend Developer
API Design
How do you approach API versioning and ensure backward compatibility for evolving services?
Microsoft
DevOps Engineer
Monitoring
How would you design a robust alerting system for a critical microservice, and what considerations are there for false positives and negatives?
Atlassian
SRE
Performance Optimization
how would you approach identifying and resolving a performance bottleneck in a production distributed system?
Deloitte
Cloud Engineer
Containers & Kubernetes