Interview Q&A / System Design
System Design interview questions
Caching, scaling, databases and classic design problems for beginners.
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- What is the PACELC theorem and how does it extend CAP?
PACELC says: if there is a Partition, choose Availability or Consistency; Else, when running normally, choose between Latency and Consistency. It captures that consistency costs latency even when nothing is broken.
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