Java & Spring¶

Java & Kotlin Language¶

java type system fundamentals - Primitives, strings, generics, exceptions, BigDecimal
kotlin language features - Null safety, data/sealed classes, extension functions, expression syntax
java collections streams - Collection hierarchy, Stream API, Kotlin collection functions
java concurrency - Threading, synchronization, ExecutorService, CompletableFuture
algorithms data structures - Sorting, searching, trees, Big O, interview patterns

spring ioc beans - IoC container, dependency injection, bean scopes, lifecycle, conditional beans
spring boot configuration - Project setup, application properties, clean architecture layers
spring mvc rest - Controllers, Thymeleaf templates, i18n, session scope
spring validation - DTO validation annotations, BindingResult, error display
spring security - BCrypt, SecurityFilterChain, role-based access, session auth

spring data access evolution - JDBC -> JdbcTemplate -> NamedParameter -> JOOQ -> CrudRepository
spring data jpa hibernate - JPA entities, relationships, inheritance, transactions, caching
database migrations - Flyway (SQL-based) and Liquibase (multi-format) schema management
spring nosql databases - Cassandra, MongoDB, Redis, Neo4j with Spring Data

android fundamentals ui - Project structure, XML layouts, Views, ViewGroups
android activity lifecycle - Activity lifecycle, Intents, navigation between screens
android recyclerview - RecyclerView, Adapter/ViewHolder, DiffUtil, custom views
android fragments navigation - Fragments, Navigation Component, Safe Args, View Binding
android architecture mvvm - MVP vs MVVM, ViewModel, LiveData, Repository pattern
android data storage - SharedPreferences, SQLite, Room ORM, Content Providers
android networking retrofit - Retrofit, OkHttp, Gson, pagination, image loading
android jetpack compose - Declarative UI, state management, LazyColumn, Compose navigation
kotlin coroutines - Suspend functions, Flow, StateFlow, Dispatchers, structured concurrency
android firebase - Firebase Auth, Cloud Firestore, Cloud Storage, real-time listeners
android dependency injection - Hilt DI framework, modules, scopes, Spring IoC parallels