Amazon Solutions Architect Mock Interview

Master 30 Amazon Solutions Architect interview questions covering AWS services, system design, and the Leadership Principles.

Question 22 of 30

Can you define the acronym SOLID and discuss its key principles?

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William Swansen

William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.

Organizations like Amazon use Object-Oriented Design, or OOD, to develop their software products and applications. Since you are expected to know this, you should be prepared for many questions addressing OOD principles, including ones asking you to define OOD terms and concepts. An effective way to respond to this question is to first describe what the term SOLID means, then discuss each element of the acronym.

William Swansen

"SOLID is an acronym for the first five object-oriented design principles. These are:

S - Single responsibility. A class should have only one job.
O - Open-closed. Objects should be opened for extension but closed for modification.
L - Liskov substitution. Addresses solving objects for type S, where S is a subtype of T.
I - Interface segregation. Clients shouldn't be forced to implement an interface or depend on methods they do not directly use.
D - Dependency Inversion. States that a high-level module should depend on abstractions, not on a low-level module."

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30Amazon Interview Questions & Answers

Creative Thinking

1.Can you describe a creative solution to a challenging problem you developed in your role as a solutions architect?

Communication

2.How would you describe Amazon Web Services (AWS) to someone outside of Amazon's IT organization?

Technical

3.What are some of the steps you recommend to protect Amazon from a 'DOS' attack?

Operational

4.What is your strategy for securing the IT assets and intellectual property of an organization?

Discovery

5.What do you believe your role is concerning supporting Amazon's functional analysts?

Direct

6.Can you explain CAP Theorem?

Technical

7.Please discuss some of the differences between asynchronous and parallel programming?

Solutions Architect

8.How do you ensure that the software you develop will scale?

Technical

9.What are the advantages of using a NoSQL database instead of an RDBMS?

Technical

10.What is a lower latency interaction, and why is it desirable in an application?

Behavioral

11.Do you subscribe to the theory of 'Fail Early and Fail Forward?'

Technical

12.Please explain domain-driven design.

Technical

13.What are the benefits of clustering?

Technical

14.What does the acronym ACID stand for?

Technical

15.How is the term deadlock used in your role as a solutions architect?

Direct

16.What is meant by the Single Responsibility Principle, and how do you use this in your work?

Technical

17.What are the differences between a binary and mutex semaphore?

Technical

18.How do you define high availability, and what are some steps you take to ensure this?

Technical

19.What is meant by "Session Affinity," and how does this relate to the concept of sticky session load balancing?

Technical

20.Are there any issues with employing sticky sessions in your systems architecture?

Technical

21.How are DRY and DIE principles used in software engineering?

Technical

22.Can you define the acronym SOLID and discuss its key principles?

Technical

23.What does system resiliency refer to, and how would you achieve this here at Amazon?

Technical

24.Do you prefer to create programs aligned with interfaces or implementations, and why?

Technical

25.Please discuss the concept of elasticity as used in your role as a solutions architect and how it contrasts with scalability.

Technical

26.Can you describe some of the differences between concurrency and parallelism?

Technical

27.What are monolithic, SOA and microservices architectures, and how do they differ from one another?

Technical

28.When would you use a NoSQL database, and when would using a relational database be better?

Leadership

29.Can you describe a key project you recently led as a solutions architect?

Discovery

Amazon Solutions Architect Mock Interview

Can you define the acronym SOLID and discuss its key principles?

30Amazon Interview Questions & Answers

1.Can you describe a creative solution to a challenging problem you developed in your role as a solutions architect?

2.How would you describe Amazon Web Services (AWS) to someone outside of Amazon's IT organization?

3.What are some of the steps you recommend to protect Amazon from a 'DOS' attack?

4.What is your strategy for securing the IT assets and intellectual property of an organization?

5.What do you believe your role is concerning supporting Amazon's functional analysts?

6.Can you explain CAP Theorem?

7.Please discuss some of the differences between asynchronous and parallel programming?

8.How do you ensure that the software you develop will scale?

9.What are the advantages of using a NoSQL database instead of an RDBMS?

10.What is a lower latency interaction, and why is it desirable in an application?

11.Do you subscribe to the theory of 'Fail Early and Fail Forward?'

12.Please explain domain-driven design.

13.What are the benefits of clustering?

14.What does the acronym ACID stand for?

15.How is the term deadlock used in your role as a solutions architect?

16.What is meant by the Single Responsibility Principle, and how do you use this in your work?

17.What are the differences between a binary and mutex semaphore?

18.How do you define high availability, and what are some steps you take to ensure this?

19.What is meant by "Session Affinity," and how does this relate to the concept of sticky session load balancing?

20.Are there any issues with employing sticky sessions in your systems architecture?

21.How are DRY and DIE principles used in software engineering?

22.Can you define the acronym SOLID and discuss its key principles?

23.What does system resiliency refer to, and how would you achieve this here at Amazon?

24.Do you prefer to create programs aligned with interfaces or implementations, and why?

25.Please discuss the concept of elasticity as used in your role as a solutions architect and how it contrasts with scalability.

26.Can you describe some of the differences between concurrency and parallelism?

27.What are monolithic, SOA and microservices architectures, and how do they differ from one another?

28.When would you use a NoSQL database, and when would using a relational database be better?

29.Can you describe a key project you recently led as a solutions architect?

30.Please talk about a time when you analyzed a difficult problem and came up with an innovative solution.