1 [10%] Equality of numbers
The following expression yields the boolean value true:
(1 + 2 === 3)
while the following expression yields false:
Answer: All APIs of Node.js library are aynchronous that is non-blocking. It essentially means a Node.js based server never waits for a API to return data. Server moves to next API after calling it and a notification mechanism of Events of Node.js helps server to get response from the previous API call.
Source: tutorialspoint.com