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This video explains a very important mathematical logic problem which applies the concept of remainder. I have explained how to find pairs of songs with total durations divisible by 60 starting from the brute force approach. I have also given Read full
This video explains a very important programming interview problem which is the trapping rainwater problem.In this problem, given an array representing elevation map, we are required to find the amount of water the elevation map can trap.I have explained all Read full
This video explains a very important programming interview problem which is the 4 sum problem.This problem can be solved using multiple techniques and algorithms.I have explained all the approaches using simple examples.I have explained 3 techniques.The first one is just Read full
This video explains the chaining collision resolution technique in hashmap.Chaining allows to keep the elements with same hash value using a linked list.I have explained everything related to chaining in details using examples. I have also explained the method to Read full
This video explains a very important interview question which is to sort a very large file which cannot fit in the main memory.We can only apply sorting algorithm to the data in main memory because accessing and doing operations on Read full