- React – Interview Questions
Twenty-four senior-level questions and answers — what actually triggers a re-render, why three setState calls only count once, what breaks when you lie to a dependency array, a five-question section on Context, when memo silently does nothing, what error boundaries do not catch, and how to diagnose a slow page. Grounded in real code.
- Spring Study Guide – Testing
When a test needs Spring and when it does not. Plain unit tests with Mockito, the cached test context and what silently evicts it, slice tests versus @SpringBootTest, @MockitoBean, why a @Transactional test rolls back by default, testing controllers with MockMvc and a whole API over a real port — every example from a suite that runs green.
- Depth-First Search
Follow one path to its end, then back up and try the next. The same code as BFS with the queue swapped for a stack — the traversal strategy IS the container. Recursive and iterative forms, cycle detection, and how to choose between DFS and BFS.
- Spring Boot – Interview Questions
Senior-level questions and answers, every one drawn from a real decision or a real bug in the pizza codebase rather than from a list. Auto-configuration, bean scopes, the proxy rule, transactions, N+1, stateless auth, and the trade-offs an interviewer is actually listening for.
- React – Sass
Sass in a Vite project is one dependency and a file rename — no config. Nesting, variables, partials and mixins in a component stylesheet, .module.scss to get scoping and Sass at once, and the one thing Sass still does that plain CSS cannot: recompile Bootstrap itself with your own colours.