Back End Developer Mock Interview
Master 30 Back End Developer interview questions covering APIs, databases, system design, and server architecture.
Question 6 of 30
What Is CAP Theorem? How do you use it in your work?
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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.
This is an example of a technical question. Technical questions will ask you about concepts, processes, or elements used in your work as a back end developer. The appropriate way to respond to a technical question is first defining the term and then describing how it is used. When answering technical questions, keep your answer brief and to the point, and anticipate a follow-up question.
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.
"The CAP Theorem was developed by Eric Brewer. It states that a distributed computer system cannot provide Consistency, Availability, and Partition tolerances at the same time. The programmer's role is to determine which of these three qualities are the most important for the program they are creating. Then, they optimize one or two of the three to match the program's requirements. The CAP Theorem is used by major computer service providers to optimize the services they provide to users."
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A distributed database can only achieve a maximum of two out of three of the following guarantees: consistency, availability, and partition tolerance. This implies that in the presence of partitions, a system architect must choose between availability and consistency. I use the CAP theorem to inform trade-offs for system design decisions and optimize performance measured against requirements, specifically whether to prioritize up-to-date or accessible data, depending on the project specifications.
Marcie's Feedback
Excellent! You've done a great job of explaining CAP Theorem and how you use it. The interviewer will undoubtedly be impressed by your knowledge. Nice job!
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