Software Engineer Senior Java Developer Interview Questions

1,895 software engineer senior java developer interview questions shared by candidates

* Can the inner class access the private members of the outer class * What all operations are synchronized in hashtable * Diff b/w hashtable and hashmap * concurrent hashmap * kind of development work done in my project * Find third largest element in the array → 2,3,1,8,6,5 * Write an abstract class and its implementation class * When will you use interface and when abstract class * Why you can implement multiple interfaces but can extend only one class
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Software Engineer - Java Developer

Interviewed at Amdocs

3.7
Jun 25, 2021

* Can the inner class access the private members of the outer class * What all operations are synchronized in hashtable * Diff b/w hashtable and hashmap * concurrent hashmap * kind of development work done in my project * Find third largest element in the array → 2,3,1,8,6,5 * Write an abstract class and its implementation class * When will you use interface and when abstract class * Why you can implement multiple interfaces but can extend only one class

Round 1: 1. Host name port number resolution https://cloud.google.com/load-balancing/docs/url-map-concepts 2. Design calculator for different consumers(Solar, Scientific, Astronomical), with code reuse 3. Code for minimum difference between the values of any two different nodes in the Binary Search tree. 4. Insert, Delete and Get in O(1) 5. SQL to select all employees along with department name, from Employee table and Department Table. 6. A/B Testing 7. Recently work experience Round 2 1. Design a jigsaw puzzle 2. Print Tree common nodes
Oct 9, 2020

Round 1: 1. Host name port number resolution https://cloud.google.com/load-balancing/docs/url-map-concepts 2. Design calculator for different consumers(Solar, Scientific, Astronomical), with code reuse 3. Code for minimum difference between the values of any two different nodes in the Binary Search tree. 4. Insert, Delete and Get in O(1) 5. SQL to select all employees along with department name, from Employee table and Department Table. 6. A/B Testing 7. Recently work experience Round 2 1. Design a jigsaw puzzle 2. Print Tree common nodes

1. HashMap, hashtable differ 2. Exceptions and types of exceptions 3. Internal working of hashmap and HashSet 4. collection used to remove/doesn't allow duplicates 5. What is a concurrent hashmap 6. Db query to write an inner join 7. Stream, lambda expressions query 8. What is an interface 9. What is a lambda expression 10. What is the stored procedure 11. Can we have catch() without try 12. can we have try without catch 13. Some db, stream API questions are also asked 14. Some aptitude questions
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Software Engineer - Java Developer

Interviewed at Cognizant

3.5
Jun 22, 2021

1. HashMap, hashtable differ 2. Exceptions and types of exceptions 3. Internal working of hashmap and HashSet 4. collection used to remove/doesn't allow duplicates 5. What is a concurrent hashmap 6. Db query to write an inner join 7. Stream, lambda expressions query 8. What is an interface 9. What is a lambda expression 10. What is the stored procedure 11. Can we have catch() without try 12. can we have try without catch 13. Some db, stream API questions are also asked 14. Some aptitude questions

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