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Senior Software Architect Interview Questions


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What are some ways to successfully roll out changes to multiple applications/services in an ecosystem where high volumn is expected and minimize or eliminate errors.

1 Answer

One techinque is to ensure that the API (contract) is versioned, another is to use markers and a load balancer to ensure that versioned services work with proper services

How does a garbage collection system work? How will you prevent an object from being garbage collected? Write N-ary tree traversal code to search a node given a String key. How many JVM instances does a tomcat server have? How would it handle multiple applications with different versions of same api (for instance log4j)? Explain wait and notify. Explain Generics. What is the difference between a static class and a singleton class? Why do you want to work for Netflix?

2 Answers

How much do you want to make?

1 Answer

I was asked to implement a linked list, originally in an actual language, but my solution became pseudo code as it's been a while since I actually implemented a linked list.

1 Answer

Architectural questions in the pretext of real case scenarios to get free consultation from well known Architects

What is a deadlock? Explain. What is Spring framework? HTTP is a stateless protocol. How is HttpSession implemented then? What is String.intern()? My Hashtable returns in constant time for most keys but for certain ones it takes a while. What is wrong? Explain volatile keyword. Is volatile keyword thread-safe? Explain a few design patterns. Name a few methods from Object class and tell what do they do. There is an integer array which only contains 1s, 2s and 3s. How will you sort it? What value has UML added in your projects? Java API says if you override equals method you should override hashCode too. Why?

Background, experience and other general question. Nothing too hard.

Most questions are built around Amazon's 14 principles.

11 Answers

Write an XML validator, on a white board. Seriously?

Describe end to end Micro services architecture? Describe trade-offs and What would you change in the architecture?

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