Java Software Developer

Java Software Developer Interview Questions

Updated 22 Jul 2024

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Interview Questions

  • Q1. Q14) Can We write Procedures in String Data JPA? How to handle complex database in Spring Data JPA persistence? using Procedures ---> Ans : Yes

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  • Q2. Q1) What version of Java Are you currently using in your Project? Q2) What are the features Of Java 8? Q3) What is MetaSpace in java 8 Q) What is Spring Exeector Framework? Q)

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  • Q3. Q4) What is the Changes w.r.t Hashmap in java 8 over java 7?

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  • Q4. Q5) What is the difference between Race Condition and Deadlock in java?

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  • Q5. Q7) What is exception handling mechanism which you are implemented in your project?

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  • Q6. Q13) How the Interprocess Communication is happened in the Microservices architecture?

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  • Q7. Q9) Do you done unit testing In your project? How Unit testing is significant in your project?

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  • Q8. Q6) What is the ResponseState and ServerState Difference?

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  • Q9. Q8 ) What is ConcurrentModificationException In Java?

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  • Q10. Q10) What is difference Between @EnableMock and @Spy in Junit5?

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+4 interview questions

Interview Questions

  • Q1. 1)First interviewer asked me to explain all technical skills and current domain. During interviewer showed me around 10 different code snippets and asked me to guess the output, these code snippets related to basic java syntax and code.

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  • Q2. 8)which java 8 features do you use in your current project

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  • Q3. 7)Java program to count length of the string without using foreach and length function

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  • Q4. 2)After that interviewer asked me to explain all principle of oops with real time example

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  • Q5. 6)sql query for finding 2nd highest salary of employee

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  • Q6. 5)concuurent modification exception fail fast and fail safe

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  • Q7. 4)How hashmap works internally

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  • Q8. 9)how to avoid hash collision

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  • Q9. 3)Types of iterator in java

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Interview Questions

  • Q1. Online DSA round where question to be solved in front of interviewer and we need to pass all the cases. Question was based on frequency sort. This was to be done on HackerRank platform for which interviewer shared the link.

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  • Q2. Basic question based on internal working of hashmap, inter threads communication, Concurrent HashMap working and how it handles thread safety.

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  • Q3. Question on synchronized keyword and it works internally. Threads and its inter communication.

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  • Q4. Was asked to design a ratelimiter service

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Interview Questions

  • Q1. Concurrent package: internal working of CopyOnWriteArrayList Diff between synchronized collection and concurrent collection

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  • Q2. Write program to find the largest number present in array having increasing then decreasing numbers.

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  • Q3. Working of HashMap Use of Equals and Hashcode method in case of HashMap

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  • Q4. Oops concepts: pass by value in Java Parent reference to child object

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  • Q5. Thread: print odd and even number in sequence using Threads

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Interview Questions

  • Q1. What is polymorphism and its types. Explain concept of stack using queues

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  • Q2. What is inheritance, difference between interface and abstract class and oops based questions

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  • Q3. I was given a string based coding question. Second question was to predict output of a program based on inheritance (easy - medium level)

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  • Q4. Array based question. Second question was to reverse a linked list

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Interview Questions

Interview Questions

  • Q1. I was given an example of a traveling company. The task was to find out the rate of traveling per kilometer using object-oriented programming and asked object oriented programming questions on this program I am crack the interview but unfortunately I am not selected.

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Interview Questions

  • Q1. What is SpringBootApplicationa annotation in spring boot?

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  • Q2. Mini Project on Spring boot microservices and spring cloud with integration of config server, zuul api, eureka discovery service and integrating with mongoDB and perform crud operations.

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  • Q3. What is @Autowired?

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Interview Questions

  • Q1. Sql query -> retrive emp details based on top 3 highest salary if two emp have same salary sort desc on the based of age. java questions-> -->flatten the nested map --> multithreading concept --> make immutable class --> sort via comparator or comparable

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Interview Questions