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Technical Lead Java Interview Questions

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595 technical lead java interview questions shared by candidates

Java coding in coderpad, involving basic algorithm, java. One coding question in concurrency which was quite interesting. One question in system design. One session for culture fit. For example: how would you make this code thread safe?
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Lead Java Engineer

Interviewed at Backblaze

3.3★
Jul 25, 2020

Java coding in coderpad, involving basic algorithm, java. One coding question in concurrency which was quite interesting. One question in system design. One session for culture fit. For example: how would you make this code thread safe?

How can we compare two binary trees to mention whether they are identical ? Algorithm complexity of Max Stock Price Difference. spring Boot Framework Related Questions Project specific complexities or Challenges addressed
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Senior Java Developer/Lead

Interviewed at App Orchid

4.1★
Aug 1, 2023

How can we compare two binary trees to mention whether they are identical ? Algorithm complexity of Max Stock Price Difference. spring Boot Framework Related Questions Project specific complexities or Challenges addressed

Interviewer was not ready to accept any solution other than his expection, very unprofessional. Questions are : What will happen if you will not override hashcode method and follow up questions After each question he will say you need to brush up as we are product based firm.
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Senior Java Developer/Lead

Interviewed at ZeMoSo

3.9★
Sep 4, 2025

Interviewer was not ready to accept any solution other than his expection, very unprofessional. Questions are : What will happen if you will not override hashcode method and follow up questions After each question he will say you need to brush up as we are product based firm.

1. Write code JDBC connection approach with details of each API. 2. Write merge sort. 3. Write bubble sort. 4. Why you used REST. 5. What are the types of design patterns. 6. JSP Methods. Servlet Containers. 7. Servelet life cycle with many incoming requests with example. 8. Write code to consume a message from queue (JMS). 9. What is cyclometric complexity. How can we avoid that. 10. Functions, procedures, triggers, Cursors theoretically. He wanted to ask more but I did not know them. 11. Cartesian views. Materialistic views. 12. Java 8 new features with example. 13. Why should we hire you. 14. He wanted to ask more on sortings and algos
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Team Lead (Java)

Interviewed at Netcracker Technology

3.5★
Jul 23, 2016

1. Write code JDBC connection approach with details of each API. 2. Write merge sort. 3. Write bubble sort. 4. Why you used REST. 5. What are the types of design patterns. 6. JSP Methods. Servlet Containers. 7. Servelet life cycle with many incoming requests with example. 8. Write code to consume a message from queue (JMS). 9. What is cyclometric complexity. How can we avoid that. 10. Functions, procedures, triggers, Cursors theoretically. He wanted to ask more but I did not know them. 11. Cartesian views. Materialistic views. 12. Java 8 new features with example. 13. Why should we hire you. 14. He wanted to ask more on sortings and algos

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