Sum up functions return value running in parallel and in sequence

Problem Description & Specifications

This interview question was asked in Intuit’s SDE2 frontend interview, where the user was asked to run functions in parallel and in sequence and evaluate there performance.

The problem statement reads as:

Write two functions:
A() returns 2 after 2 seconds
B() returns 3 after 3 seconds
Return their sum in two ways:
Parallel execution → Total time: 3 seconds
Sequential execution → Total time: 5 seconds