System Engineer

You are given a N x M matrix of integers, print the spiral path of the matrix.

For example:

You are given the arrival and departure times of N trains at a railway station in a day. You need to find the minimum of platforms required for the railway station such that no train waits i.e No train should wait for the platform to be clear or free.

You have been given a long type array/list 'arr’ of size 'n’.

It represents an elevation map wherein 'arr[i]’ denotes the elevation of the 'ith' bar.

Print the total amount of rainwater that can be trapped in these elevations.

Note :

The width of each bar is the same and is equal to 1.

Example:

Input: ‘n’ = 6, ‘arr’ = [3, 0, 0, 2, 0, 4].

Output: 10

Explanation: Refer to the image for better comprehension:

Note :

You don't need to print anything. It has already been taken care of. Just implement the given function.

It was an online round of Zoom meetings. They asked some questions from DS and algorithms. As I coded my questions in C++. So they asked some questions from C++ as well. They asked me many questions from OOPs.
They also asked about the projects mentioned in my resume. I knew everything about my projects. They were happy with this interview. So please write only what you know on your resume.
I was able to give answers to approximately all the questions asked by them.