Some simple coding questions and basic Java questions.
Senior Java Software Developer Interview Questions
412 senior java software developer interview questions shared by candidates
Basic Java questions and coding questions
1st Technical Round: 1. Method overriding rules? 2. Output? • //classes will compile fine bcos both r throwing run time exceptions • class TestOverride { • void solution() throws NullPointerException { • System.out.println("super"); • } • } • • class TestSubOverride extends TestOverride { • void solution() throws RuntimeException { • System.out.println("sub"); • } • } 2. Given array {4,5,6,1,2,4}; how do u search particular element ex:1? Ans: he was looking for best search algorithm – ans is binary search algorithm 3. Consider I have huge data which is stored randomly, which data structure is best for retrieval with performance of O(1)? Ans: Hashmap bcos of performance O(1) always 4. Write a code to delete a node from LinkedList 5. Write a simple code for Threading. 6. What is difference between callable and Runnable? 7. What is functional interface? 8. Why functional interface should have only one abstract method why not more than one? 9. When we use lamda expressions? 10. What is difference between IOC and dependency injection? 11. Why do we need dependency injection? 12. Scopes of bean in spring? 2nd Technical Round: 1. Why Java is so popular? In depth answer 2. Given Name, write code to print all combinations using that. 3. Given array, {1,2,3,4,5,6,7,8} and {4,1,2,5,1,2,3,4,5,6,7,8}, at any given position how do you find out array is sorted or not. (Circular sorting)
Core Java-Collections, Serialization, Multi-threading, OOPS concepts, SOLID Principles, Design Pattern with implementation, Spring Boot, JPA, HIbernate, SQL queries, AWS Services- Lambda, Fargate, Docker, Kubernatives, S3 configuration. Coding - Arrays, Strings, LinkedList Java Stream lambda for custom class
core java and spring questions
how to find nth largest number in array
A couple of about me and project explanations in each round Core Java, collections, threads, generics, web services, spring, hibernate, configurations, how comfortable I am with the configurations, tools, version control.
Basic core java questions. Spring Boot questions. Try with resources Multiple databases on Spring Boot SQL joins queries
Exception super class name ? & error vs exception ?
Eager and Lazy loading concept andprovide implementation code. Gave one scenario and asked to explain what will happen if we use eager and lazy loading in that code
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