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Senior Java Developer Interview Questions

"Senior developers have years of experience in Java and have the knowledge and communication skills to mentor other developers. Companies prioritize strong technical skills and questions will focus on problem solving and critical thinking. A bachelor's degree in computer science or a related field, along with years of industry experience are standard."

5,296 senior java developer interview questions shared by candidates

R1: - 2 medium level leetcode problems (30 mins and 45 mins) R2: - Questions about experience, whats and whys - Given a function sendMessage(sender, message), how to implement scheduled message functionality R3: - How does concurrent hashmap work? - What is https and explain its working and benefit - What is jwt auth? What is oAuth? - What are spring interceptors and filters and what's the difference. R4: Given a system, say twitter, how to create a blacklist checking mechanism. For each country, see whether govt has blacklisted the IP using a govt provided API that returns yes/no when IP is provided. If an IP is blacklisted, don't allow access to the system. Blacklist updates every 24 hours. What's the best implementation for scale?
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Senior Java Developer

Interviewed at Eltropy

4★
Dec 11, 2024

R1: - 2 medium level leetcode problems (30 mins and 45 mins) R2: - Questions about experience, whats and whys - Given a function sendMessage(sender, message), how to implement scheduled message functionality R3: - How does concurrent hashmap work? - What is https and explain its working and benefit - What is jwt auth? What is oAuth? - What are spring interceptors and filters and what's the difference. R4: Given a system, say twitter, how to create a blacklist checking mechanism. For each country, see whether govt has blacklisted the IP using a govt provided API that returns yes/no when IP is provided. If an IP is blacklisted, don't allow access to the system. Blacklist updates every 24 hours. What's the best implementation for scale?

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