I attended 3 rounds of interviews:

Round 1: Two HackerRank questions. The first question was very easy, and the second was of average difficulty.

Round 2: CoderPad test: Given an array of non-negative numbers and a target value, return the length of the smallest subarray whose sum is greater than the target value. You needed to provide a running solution with reduced complexity.

Round 3: Telephone Interview:

• Question 1: Count ways to reach the n’th stair.
• Question 2: A 5-card magic trick. You needed to find the 5th card.

(You can easily find solutions to these questions with a quick Google search.) For question 2, I had to explain the whole trick.

We had a 1-hour discussion for both questions. I solved question 1 completely and provided an approximate solution for question 2.

After a few days, I received a rejection email. I'm unsure of the exact reason.

Count ways to reach the n’th stair.