VVDN Technologies Java Developer Interview Questions and Answers

Q1. Questions from core java Java 8,Hibernate,Spring,Spring Boot,RestApi
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Easy and good ,topic are general like arithematic and veral i think it last for 120mins

Time will be around 20-30 mins ,in on campus ,topic will be easy to connect and in group there will minimum of 10-15 peopel.

First round we have 3 coding questions based on arrays , strings , Linked list

Q1. In this round the interviewer asked java questions based on oops multithreading and dsa question based on heaps, array , LinkedList
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There was a coding test to write 2 java program

Q1. Comparable vs Comparator
Ans. 
Comparable is an interface used for natural ordering, while Comparator is used for custom ordering in Java.
• Comparable interface is used to define the natural ordering of objects. It is implemented by the class whose objects are to be sorted.

• Comparator interface is used to define custom ordering of objects. It is implemented by a separate class that compares objects based on specific criteria.

• Example: Sorting a list of ...read more
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Q2. Difference between List and Set
Ans. 
List allows duplicate elements and maintains insertion order, while Set does not allow duplicates and does not maintain order.
• List can contain duplicate elements, Set cannot

• List maintains insertion order, Set does not guarantee order

• List is implemented by classes like ArrayList, LinkedList, Set is implemented by classes like HashSet, TreeSet

• Example: List<String> list = new ArrayList<>(); Set<String> s
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