###################  ## Java / OOP ########################


 1. Why String are immutable?

2. Difference Between StringBuffer and StringBuilder?

3. What is a Garbage collector in Java? Define some name of algorithm for use in GC.

4. How is a Garbage collector?

5. What finally keyword?

6. How Memory Leaks in Java Arithmetic Garbage Collector?

7. What is the advantage of Java partially OOP?

8. Why is immutability used for concurrent programming?

9. What is Functional Interface?

10. Is Functional interface can extend another interface?

11. Can we create an instance of an abstract class?

12. Can we create a Java server without any framework?

13. What is a String pool?

14. Java Memory Management?

15.




######################Spring Boot##############################







######################## JPA /  Hibernate#####################################

1. N+1 problem?

2. Hibernate Caching? Level of caching?

3. Jpa vs Hinernate?

4. Way of Optimize Query? Analyzee tools?

5. Lazy loading?

6. Get vs Load?

7.  




######################### Git/SVN###############################




######################## Design Pattern #########################






################### System Design ##########################





################### Unit Testing ##########################



################ Devops ###################




############################## Basic Problem Solving ##########

1. Prime Number 

2. Fibonacci Series

3. Factorial using recursion

4. HashMap

5. Frequency Count

6. Rotate Array/number 

7. Reverse String

8. Palindrom 


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