Q1. What is the difference between cache-aside and read-through?
Cache-aside (lazy loading): the application checks the cache first. On a miss it reads the database, then writes the value into the cache and returns it. The application ...
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Q2. Find the next number: 2, 6, 12, 20, 30, ?
Look at the differences: 4, 6, 8, 10, which increase by 2 each time. The next difference is 12, so the next term is 30 + 12 = 42. Alternative view: the terms are n(n+1) f...
Q3. What are common agile anti-patterns and how do you address them?
Common anti-patterns usually dress up traditional management as agile. Zombie Scrum: the ceremonies happen but there is no real self management or working software. The D...
Q4. How does the saga pattern handle distributed transactions?
A saga replaces a single ACID transaction across services with a sequence of local transactions, each publishing an event or invoking the next step. If a step fails, prev...
Q5. Explain the circuit breaker pattern.
A circuit breaker stops a caller from hammering a failing dependency. It tracks failures and moves between three states: - Closed: calls pass through while failures stay ...