3 JAVA questions based on hashmap and arrays.
Java Software Developer Interview Questions
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Q: What did you know about Zettle? Q: Tell about yourself
How many team members in a group
Oops Java basics (header files) For coding - Arrays are sufficient
sort array
1. How many oops concept can you apply in single class, 2. How do you manage transactions in microservices, how will you configure 2 database in a single spring boot application 3. SOLID principal 4. stream 5. CRUD controller 6. Design patterns
In this round basics of java 8 like functional interface ,lamda expression, comparable vs comparator.Also I have mentioned about spring boot so they asked few annotations amd why they are used(@respository,@service,etc)
what is your recent project that you have been work explain your project
Q : java 8 features
Technical Questions : 1. Difference between comparator and comparable ? when would we use comparator ? 2. what is a functional interface? 3. what are different type of data structures you use ? 4. using java 8 convert an array of integers to comma seprated string . 5. difference between array list and linked list ? and which is faster for retrieval? 6. can we use classes as keys in has map ? 7. Singleton prototype in thread. 8. Scope in spring boot ? 9 Do you know patch in spring boot ? 10. when will the dependencies be loaded ? at run time or static time ? 11. If I have two classes with same name what happens ? 12. if I use a concurrent hash map how is it thread safe ? 13. what happens if I try to put a same key in hash map twice ? 14.if i have a custom object as key in hash map how is hash value computed ? 15. what is a method and function level locking ? 16. what are functional interfaces ? 17 . does spring boot use eager or lazy loading ? 18. what is Optional class in spring boot ? 19. what is circular dependency in spring boot.
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