Interview

 Q: When to use Parallel vs Async?

✅ Answer:

"Parallel is used for CPU-bound operations where computation is heavy,
whereas async/await is used for I/O-bound operations where the system waits for external resources like APIs or databases."

👉 Bangla:

"CPU heavy কাজ হলে Parallel, আর external wait থাকলে Async/Await ব্যবহার করি।"

Feature	Parallel	Async/Await
Type	CPU-bound	I/O-bound
Thread	Multiple threads	Non-blocking
Performance	Fast for heavy computation	Efficient for waiting
Use Case	Data processing	API/DB/File