What is a blue-green deployment strategy?
Answer options
A
Deploying code only at night (blue for night, green for day)
B
Running two identical production environments and switching traffic between them during releases
C
Using two different programming languages
D
Deploying to development (green) before production (blue)
Correct answer: Running two identical production environments and switching traffic between them during releases
Detailed Solution & Conceptual Analysis
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Key Engineering Takeaway
In Agile & DevOps, understanding the underlying mechanics of DevOps is critical for writing performant, bug-free production code and passing rigorous technical architecture reviews.