For Spring custom services with the only implementation we can use interface + implementation class or can implement the service in one class. Why do we need interfaces if we have the only implementation?
Java Software Engineer Interview Questions
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Spring mvc Hashtable vs concurrent hashmap Map vs flat map Api gateway Microservices vs monolithic Streams Catch why Arraylist vs linked list Classnotfound exceptions 500internl error Patch method Lambda expression Equals vs == Foreign key annotation
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Singleton design pattern , deadlook
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Self Introduction View Joins Static Keyword Html Tags Iframe
– Servlet Lifecycle – Multithreading – Inheritance – Polymorphism – Concepts of Interface & Abstract Class – Static keyword – Garbage collection mechanism – Diff between Java and C/C++ – Explain the properties of Java – Collection Framework(Important). He gave me a code to write using ArrayList
Java Concepts - Arrays, Strings, pattern program, Exception Handling
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