Below are my collection of resources to learn about system design/operating systems related concepts. As I continue on my journey of learning new things, I will keep on adding to this list ! :) Happy Learning !! p.s. I have created a new post dedicated to “Databases related notes w.r.t…

Problem Statement: Given a huge number of hosts in multiple regions, how will you deploy code and handle error detection, high availability etc. ? Before we dive down how can we deploy in multiple regions, lets try to understand how and what strategies need to be taken into consideration when…

Design a search autocomplete system for a search engine. Users may input a sentence (at least one word and end with a special character '#'). You are given a string array sentences and an integer array times both of length n where sentences[i] is a previously typed sentence and times[i]…

Given a grid G of numbers representing heights of persons standing next to each other. A person can see another person in the grid if the height of everyone in between is shorter than them A person can see to the right and down Return a grid A where A[x][y] is the sum of all the persons seen from G[x][y] Example [9, 6, 8, 5, 11] [1, 5, 3, 7, 9] [2, 1, 4, 6, 1] Output [5, 3, 4, 2, 1] [4, 4, 3, 2, 1] [3, 2, 1, 1, 0]

System calls provide transition from ‘user space’ to ‘kernel space’; These are not just a routine calls. In newer systems, kernel code for system calls do exist inside the address space of the process itself ( top of the address space stack). process cant access them in general, but only…

Design a Leaderboard class, which has 3 functions: addScore(playerId, score): Update the leaderboard by adding score to the given player's score. If there is no player with such id in the leaderboard, add him to the leaderboard with the given score. top(K): Return the score sum of the top K…

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. Implement the MinStack class: MinStack() initializes the stack object. void push(int val) pushes the element val onto the stack. void pop() removes the element on the top of the stack. int top() gets the…