How to create a singleton class?
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write code to reverse a string using recursion.
what is the internal working of hashmap?
How to create a final class?
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There were a problem statement wherein you need to design a solution for time tracking system with the organization. You need to mention the efforts estimation as well as resource plan as well
Remove duplicate from char array linked list -find duplicate
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does tree data structure use hashcode and equals ? how sorting will happen internally in treeset/treemap?
Java 8 questions Design pattern of microservices Collection questions Problem solving by stream api Question from previous projects
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