Which of the following is true with respect to Node.
A - Every API of Node js are asynchronous.
B - Node being a single thread, and uses async function calls to maintain the concurrency.
C - Node thread keeps an event loop and whenever any task get completed, it fires the corresponding event which signals the event listener function to get executed.
D - All of the above.
Ans is Node being a single thread, and uses async function calls to maintain the concurrency.