Quick Answer
Runnable: run() method, no return value, can't throw checked exceptions. Callable: call() method, returns a value (Future), can throw checked exceptions. Use Callable when you need the result of an async computation. Submit to ExecutorService: Future future = executor.submit(callable); result = future.get() (blocks until done).
Answer
Runnable: No return value; no checked exceptions. Callable: Returns value and may throw exceptions. Used with ExecutorService to get Future results.
S
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.
