advancedREST Concurrency Scenarios79 of 469
A REST API receives a payload of 100 records and your ThreadPoolExecutor has only 8 threads — how would you process all and return response only after all complete?
Tests whether you reach for CompletableFuture.allOf() (or an ExecutorService + invokeAll/CountDownLatch) to fan out the 100 records across the 8-thread pool and block only on the combined future, instead of serially awaiting each task.
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