Node Js Backend Developer Interview Questions and Answers for Freshers

Node.js is asynchronous to handle multiple requests efficiently without blocking the execution of other code.

• Node.js uses non-blocking I/O operations to handle multiple requests concurrently.

• Asynchronous programming allows Node.js to execute code while waiting for I/O operations to complete.

• Node.js event loop helps in managing asynchronous operations efficiently.

• Callbacks are commonly used in Node.js to handle asynchronous operations.

• Example: Reading a file while processing o...read more

Merge overlapping intervals in an array

• Sort the intervals based on their start times

• Initialize an empty result array

• Iterate through the sorted intervals

• If the current interval overlaps with the previous interval, merge them

• If not, add the previous interval to the result array and update the previous interval

• Add the last interval to the result array

• Return the result array