IBM Software Developer interview questions

All systems design questions, primarily focused on infrastructure architecture and object-oriented programming (OOP) principles. The interviewer asked about databases (relational vs. non-relational, indexing, normalization, transactions), REST APIs (endpoints, authentication, scalability, and statelessness), and message queues (Kafka, RabbitMQ, asynchronous communication, producer-consumer models). They also touched on caching strategies, load balancing, microservices vs. monolith trade-offs, data consistency, API versioning, system fault tolerance, horizontal scaling, and object-oriented design patterns such as inheritance, composition, and SOLID principles.

Online assessment is 2 leetcode questions, in a 60-minute window. Highlights and auto-complete are available. Goal is to pass all test cases, where there are also hidden ones, you can run custom test cases as well, fairly standard assessment. The assessment is proctored.