Quick Answer
In parallel streams, exceptions in one thread are wrapped in a RuntimeException and rethrown in the calling thread. Use a try-catch around the terminal operation. In CompletableFuture, use exceptionally(fn) to handle exceptions per step, or handle(fn) which gets both result and exception. In ExecutorService, exceptions from Callable are wrapped in ExecutionException from Future.get().
Answer
Handle exceptions inside threads individually. Use CompletableFuture.exceptionally() or handle(). Avoid uncaught exceptions that silently terminate threads.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
