2026

Spring Interview Questions 2026

A current, 2026 snapshot of the Spring interview questions worth knowing — kept up to date as frameworks and best practices evolve, so you prepare with what companies are actually asking in 2026.

167Questions15Beginner13Intermediate139Senior

167 Spring questions

  1. 1What is Spring MVC architecture?Intermediate
  2. 2What is Spring Profiles?Intermediate
  3. 3What is Caching in Spring?Intermediate
  4. 4What is Spring Boot Actuator?Intermediate
  5. 5What is @Qualifier used for in Spring?Intermediate
  6. 6What is Spring Security?Intermediate
  7. 7What is the difference between @Bean and @Component?Intermediate
  8. 8What is Spring Data JPA?Intermediate
  9. 9What is Spring Transaction Management?Intermediate
  10. 10What is Spring AOP (Aspect-Oriented Programming)?Intermediate
  11. 11What is the use of @Value annotation in Spring?Beginner
  12. 12What is a Spring Bean lifecycle?Beginner
  13. 13What is @ControllerAdvice?Beginner
  14. 14What is SpringApplication.run()?Beginner
  15. 15What does @Autowired do?Beginner
  16. 16What is application.properties used for?Beginner
  17. 17What is a REST Controller in Spring?Beginner
  18. 18What is Spring Boot?Beginner
  19. 19Difference between @Component, @Service, and @RepositoryBeginner
  20. 20What is Dependency Injection in Spring?Beginner
  21. 21What is Inversion of Control (IoC) in Spring?Beginner
  22. 22Spring Interview Question 1 (Free)Beginner
  23. 23Spring Interview Question 5 (Free)Intermediate
  24. 24Spring Interview Question 4 (Free)Beginner
  25. 25Spring Interview Question 3 (Free)Senior
  26. 26Spring Interview Question 2 (Free)Intermediate
  27. 27How does Spring Boot behave during cascading retry storms?Senior
  28. 28How does Spring Boot behave when connection pooling is misaligned with DB capacity?Senior
  29. 29How does Spring Boot behave under extreme logging load in production?Senior
  30. 30How does Spring Boot handle GC + container memory limit mismatch?Senior
  31. 31How does Spring Boot behave during dependency injection failure cascades?Senior
  32. 32How does Spring Boot handle backpressure collapse in non-reactive (MVC) systems?Senior
  33. 33How does Spring Boot behave during DNS resolution delays in microservices?Senior
  34. 34How does Spring Boot behave under kernel-level file descriptor exhaustion?Senior
  35. 35How does Spring Boot behave when the JVM experiences CPU starvation at the OS level?Senior
  36. 36How does Spring Boot handle runtime configuration drift in distributed systems?Senior
  37. 37How does Spring Boot behave during high contention on synchronized blocks?Senior
  38. 38How does Spring Boot handle cascading failure in distributed caching systems?Senior
  39. 39How does Spring Boot handle internal request deserialization performance bottlenecks?Senior
  40. 40How does Spring Boot behave when GC overhead limit is exceeded?Senior
  41. 41How does Spring Boot handle synchronous vs asynchronous bottlenecks?Senior
  42. 42How does Spring Boot handle memory fragmentation in long-running services?Senior
  43. 43How does Spring Boot manage request lifecycle from Tomcat to controller method?Senior
  44. 44How does Spring Boot handle CPU throttling in containerized environments (Kubernetes)?Senior
  45. 45How does Spring Boot behave under partial network partition in microservice architecture?Senior
  46. 46How does Spring Boot handle system-wide failure recovery strategies?Senior
  47. 47How does Spring Boot behave when serialization and GC interact under heavy load?Senior
  48. 48How does Spring Boot handle backpressure in reactive WebFlux pipelines under overload?Senior
  49. 49How does Spring Boot handle distributed tracing context loss?Senior
  50. 50How does Spring Boot behave during JVM full GC cycles in production systems?Senior
  51. 51How does Spring Boot handle connection pool starvation in HikariCP?Senior
  52. 52How does Spring Boot manage asynchronous execution context propagation?Senior
  53. 53How does Spring Boot handle request queueing inside embedded Tomcat under load?Senior
  54. 54How does Spring Boot behave during partial service degradation in a microservice chain?Senior
  55. 55How does Spring Boot behave under JVM class metadata pressure (Metaspace issues)?Senior
  56. 56How does Spring Boot handle multi-tenant architecture design?Senior
  57. 57How does Spring Boot handle large payload performance optimization?Senior
  58. 58How does Spring Boot handle circular dependency resolution internally?Senior
  59. 59How does Spring Boot handle HTTP request timeout propagation?Senior
  60. 60What is Spring Boot internal validation pipeline for @Valid annotations?Senior
  61. 61How does Spring Boot manage HTTP keep-alive connections internally?Senior
  62. 62What happens internally when Spring Boot runs out of thread pool capacity?Senior
  63. 63How does Spring Boot handle classloader isolation in embedded server environments?Senior
  64. 64How does Spring Boot behave under JVM pause (GC stop-the-world events)?Senior
  65. 65How does Spring Boot handle request deserialization vulnerabilities?Senior
  66. 66How does Spring Boot handle multi-database transactions?Senior
  67. 67What is Spring Boot internal request filtering order and impact?Senior
  68. 68How does Spring Boot handle configuration binding internally?Senior
  69. 69How does Spring Boot handle high-latency downstream services?Senior
  70. 70What is Spring Boot internal auto-configuration failure analysis mechanism?Senior
  71. 71How does Spring Boot handle memory leaks caused by ThreadLocal?Senior
  72. 72How does Spring Boot handle graceful shutdown in containerized environments?Senior
  73. 73How does Spring Boot handle bean destruction lifecycle and resource cleanup?Senior
  74. 74What is Spring Boot internal request dispatch optimization?Senior
  75. 75How does Spring Boot handle startup memory footprint optimization?Senior
  76. 76How does Spring Boot handle circuit breaker internal state transitions?Senior
  77. 77What is Spring Boot internal serialization bottleneck in REST APIs?Senior
  78. 78How does Spring Boot handle REST API versioning strategies?Senior
  79. 79How does Spring Boot handle database transaction isolation levels?Senior
  80. 80What is Spring Boot memory pressure under high concurrency?Senior
  81. 81How does Spring Boot handle internal bean post-processing lifecycle?Senior
  82. 82What is Spring Boot internal mechanism for handling HTTP message conversion?Senior
  83. 83How does Spring Boot handle event-driven architecture internally using ApplicationEvents?Senior
  84. 84How does Spring Boot handle hot reload and class redefinition?Senior
  85. 85What is Spring Boot anti-pattern in microservices design?Senior
  86. 86How does Spring Boot handle configuration encryption?Senior
  87. 87What is Spring Boot request retry and idempotency handling strategy?Senior
  88. 88How does Spring Boot handle database migration in production?Senior
  89. 89What is Spring Boot actuator thread dump analysis?Senior
  90. 90What is Spring Boot internal proxy creation mechanism?Senior
  91. 91How does Spring Boot handle classpath conflicts and dependency hell?Senior
  92. 92What are common production failure modes in Spring Boot applications?Senior
  93. 93How does Spring Boot handle configuration refresh at runtime?Senior
  94. 94What is Spring Boot request tracing using OpenTelemetry?Senior
  95. 95How does Spring Boot handle distributed caching consistency?Senior
  96. 96What is Spring Boot thread starvation problem?Senior
  97. 97How does Spring Boot handle graceful degradation in microservices?Senior
  98. 98What is backpressure handling in Spring WebFlux and why is it critical?Senior
  99. 99How does Spring Boot handle classpath scanning optimization?Senior
  100. 100What happens inside Spring ApplicationContext refresh() lifecycle?Senior
  101. 101How does Spring resolve bean creation order and dependency graph internally?Senior
  102. 102What is Spring Boot deployment strategy in Kubernetes?Senior
  103. 103What is Spring Boot observability stack?Senior
  104. 104What is Spring Boot multi-threading pitfalls in web applications?Senior
  105. 105What is Spring Boot database connection lifecycle?Senior
  106. 106What is Spring Boot security context propagation in microservices?Senior
  107. 107What is Spring Boot reactive vs blocking architecture comparison?Senior
  108. 108What is Spring Boot asynchronous execution model?Senior
  109. 109What is Spring Boot memory model and garbage collection interaction?Senior
  110. 110What is Spring Boot startup bottleneck analysis strategy?Senior
  111. 111What is Spring Boot class loading mechanism and how does it affect performance?Senior
  112. 112What is Spring Boot scalability strategy in production systems?Senior
  113. 113What is Spring Boot distributed transaction problem?Senior
  114. 114What is Spring Boot concurrency problem in singleton beans?Senior
  115. 115What is Spring Boot integration testing strategy?Senior
  116. 116What is Spring Boot logging architecture?Senior
  117. 117What is Spring Boot health check customization using Actuator?Senior
  118. 118What is Spring Boot memory leak diagnosis strategy?Senior
  119. 119How does Spring Boot handle request lifecycle internally?Senior
  120. 120What is Spring Boot auto-wired ambiguity resolution strategy?Senior
  121. 121How does Spring Boot handle externalized configuration precedence?Senior
  122. 122What is Spring Boot native image (GraalVM) and why is it used?Senior
  123. 123What is request scope vs session scope in Spring MVC?Senior
  124. 124What is Spring Boot packaging (fat JAR vs WAR)?Senior
  125. 125What is Spring Boot thread pool management?Senior
  126. 126What is optimistic vs pessimistic locking in Spring Data JPA?Senior
  127. 127What is distributed configuration management in Spring Cloud?Senior
  128. 128What is Spring Boot metrics system (Micrometer)?Senior
  129. 129What is Spring Security OAuth2 vs JWT authentication?Senior
  130. 130What is Spring Boot conditional annotations (@ConditionalOnClass, @ConditionalOnProperty)?Senior
  131. 131What is Spring Boot startup process internally?Senior
  132. 132How does Spring handle lazy initialization of beans?Senior
  133. 133What is the difference between @Transactional propagation types in Spring?Senior
  134. 134What is Spring Boot multi-module architecture?Senior
  135. 135What is profiling and benchmarking in Spring Boot applications?Senior
  136. 136What is graceful shutdown in Spring Boot?Senior
  137. 137What is idempotency in Spring REST APIs?Senior
  138. 138What is connection pooling in Spring Boot?Senior
  139. 139What is Spring Interceptor?Senior
  140. 140What is request filtering in Spring Boot?Senior
  141. 141What is Spring Boot DevTools?Senior
  142. 142What is Spring event-driven architecture?Senior
  143. 143What is load balancing in Spring Cloud?Senior
  144. 144How does Spring handle exception translation in persistence layer?Senior
  145. 145What is method-level security in Spring Security?Senior
  146. 146What is Spring ApplicationContext vs BeanFactory?Senior
  147. 147What is Spring Bean PostProcessor and why is it important?Senior
  148. 148What is Spring Boot configuration binding using @ConfigurationProperties?Senior
  149. 149What is Spring Boot memory management and GC considerations?Senior
  150. 150What is service discovery in Spring Cloud (Eureka)?Senior
  151. 151What is API Gateway role in Spring Cloud architecture?Senior
  152. 152What is Hibernate first-level and second-level cache in Spring?Senior
  153. 153How does Spring manage concurrency and thread safety?Senior
  154. 154What is resilience in Spring microservices (Circuit Breaker pattern)?Senior
  155. 155What is distributed tracing in Spring Boot microservices?Senior
  156. 156What is Spring Boot embedded server architecture?Senior
  157. 157What is reactive programming in Spring WebFlux?Senior
  158. 158What is Spring Boot Starter mechanism?Senior
  159. 159What is circular dependency in Spring and how is it resolved?Senior
  160. 160What is Spring Security filter chain?Senior
  161. 161How does Spring Boot auto-configuration work internally?Senior
  162. 162What is the difference between Spring Bean scopes (singleton, prototype, request, session)?Senior
  163. 163Spring Advanced Interview Question 10Beginner
  164. 164Spring Advanced Interview Question 9Senior
  165. 165Spring Advanced Interview Question 8Intermediate
  166. 166Spring Advanced Interview Question 7Beginner
  167. 167Spring Advanced Interview Question 6Senior

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Are these Spring interview questions up to date for 2026?

Yes. This page reflects 167 Spring interview questions kept current with today's frameworks, tooling and interview trends, with each answer maintained and dated.

What Spring topics should I focus on in 2026?

Prioritise the fundamentals plus the modern patterns interviewers ask about now. Each question here includes a detailed answer, code example and common mistakes so you can target the highest-impact areas.

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